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Molecular Advances of Bud Dormancy in Trees J. Exp. Bot. (IF 6.9) Pub Date : 2024-04-23 Jihua Ding, Kejing Wang, Shashank Pandey, Mariano Perales, Isabel Allona, Md Rezaul Islam Khan, Victor B Busov, Rishikesh P Bhalerao
Seasonal bud dormancy in perennial woody plants is a crucial and intricate process that is vital for the survival and development of plants. Over the past few decades, significant advancements have been made in understanding many features of bud dormancy, particularly in model species, where certain molecular mechanisms underlying this process have been elucidated. In this review, we provide an overview
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Non canonical bases differentially represented in the sex chromosomes of the dioecious plant Silene latifolia J. Exp. Bot. (IF 6.9) Pub Date : 2024-04-22 Hubinský Marcel, Hobza Roman, Marta Starczak, Gackowski Daniel, Kubát Zdeněk, Janíček Tomáš, Horáková Lucie, Jose Luis Rodriguez Lorenzo
The oxidation of 5-methylcytosine (5mC) to 5-hydroxymethylcytosine (5hmC), 5-formylcytosine (5fC), and 5-carboxylcytosine (5caC), known as oxi-mCs, garners significant interest in plants as potential epigenetic marks. While research in mammals has established a role in cell reprogramming, carcinogenesis and gene regulation, their functions in plants remain unclear. In rice, 5hmC has been associated
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Navigating Amaryllidaceae Alkaloids: Bridging Gaps and Charting Biosynthetic Territories – A Comprehensive Review J. Exp. Bot. (IF 6.9) Pub Date : 2024-04-22 Nuwan Sameera Liyanage, Fatima Awwad, Karen Cristine Gonçalves dos Santos, Thilina U Jayawardena, Natacha Mérindol, Isabel Desgagné-Penix
Amaryllidaceae alkaloid (AAs) biosynthesis has garnered significant attention in recent years, particularly with the commercialisation of galanthamine as a treatment for the symptoms of Alzheimer’s disease. A significant amount of research work over the last 8 decades has focused on the understanding of AA biosynthesis, starting from early radiolabelling studies to recent multi-omics analysis with
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Sexy ways: the methodical approaches to study plant sex chromosomes J. Exp. Bot. (IF 6.9) Pub Date : 2024-04-22 Roman Hobza, Václav Bačovský, Radim Čegan, Lucie Horáková, Marcel Hubinský, Tomáš Janíček, Bohuslav Janoušek, Pavel Jedlička, Jana Kružlicová, Zdeněk Kubát, José Luis Rodríguez Lorenzo, Pavla Novotná, Vojtěch Hudzieczek
Sex chromosomes have evolved in many plant species with separate sexes. Current plant research is shifting from examining the structure of sex chromosomes to exploring their functional aspects. New studies are progressively unveiling the specific genetic and epigenetic mechanisms responsible for shaping distinct sexes in plants. While the fundamental methods of molecular biology and genomics are generally
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Improving transformation and regeneration efficiency in medicinal plants: Insights from other recalcitrant species J. Exp. Bot. (IF 6.9) Pub Date : 2024-04-22 Praveen Lakshman Bennur, Martin O’Brien, Shyama C Fernando, Monika S Doblin
Medicinal plants are integral to traditional medicine systems world-wide, being pivotal for human health. Harvesting plant material from natural environments, however, has led to species scarcity, prompting action to develop cultivation solutions that also aid conservation efforts. Biotechnological tools, specifically plant tissue culture and genetic transformation, offer solutions for sustainable
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Time-course analysis system for leaf feeding marks revealed effect of Arabidopsis thaliana trichomes on herbivore insect feeding behavior J. Exp. Bot. (IF 6.9) Pub Date : 2024-04-22 Naoyuki Sotta, Toru Fujiwara
Bioassay with insect herbivore is a common approach to studying plant defense levels. While measuring insect growth rate as a negative indicator of plant defense levels is simple and straightforward, analyzing more detailed feeding behavior parameters of insects, such as feeding rates, leaf area consumed per feeding event, intervals between feeding events, and spatiotemporal patterns of feeding sites
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How to use CRISPR/Cas9 in plants - from target site selection to DNA repair J. Exp. Bot. (IF 6.9) Pub Date : 2024-04-22 Adéla Přibylová, Lukáš Fischer
A tool for precise, target-specific, efficient and affordable genome editing, it is a dream for many researchers, from those who do basic research to those who use it for applied research. Since 2012, we have the tool that almost fulfils such requirements; it is based on CRISPR/Cas systems. However, even CRISPR/Cas has limitations and obstacles that might surprise its users. In this review, we focus
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Evolution of the FLOWERING LOCUS T-like genes in angiosperms: a core-Lamiales-specific diversification J. Exp. Bot. (IF 6.9) Pub Date : 2024-04-20 Jiu-Xia Zhao, Shu Wang, Jing Wen, Shi-Zhao Zhou, Xiao-Dong Jiang, Mi-Cai Zhong, Jie Liu, Xue Dong, Yunfei Deng, Jin-Yong Hu, De-Zhu Li
Plant life-history is determined by two transitions, the germination and the flowering times, in which the phosphatidylethanolamine-binding proteins (PEBP) FLOWERING LOCUS T (FT) and TERMINAL FLOWER1 (TFL1) play key regulatory roles. Compared to the highly conserved TFL1-likes, FT-like genes vary in copy numbers significantly in gymnosperms and monocots of the angiosperms, while sporadic duplications
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Redox regulation of gene expression: proteomics reveals multiple previously undescribed redox-sensitive cysteines in transcription complexes and chromatin modifiers J. Exp. Bot. (IF 6.9) Pub Date : 2024-04-20 Avilien Dard, Frank Van Breusegem, Amna Mhamdi
Redox signalling is crucial for regulating plant development and adaptation to environmental changes. Proteins with redox-sensitive cysteines can sense oxidative stress and modulate their functions. Recent proteomics efforts have comprehensively mapped the proteins targeted by oxidative modifications. The nucleus, the epicentre of transcriptional reprogramming, contains a large number of proteins that
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OsRH52A, a DEAD-Box protein, is required for embryo sac development by regulating functional megaspore specification in rice J. Exp. Bot. (IF 6.9) Pub Date : 2024-04-20 Jinghua Huang, Zhengping Qiao, Hang Yu, Zijun Lu, Weibin Chen, Junming Lu, Jinwen Wu, Yueming Bao, Muhammad Qasim Shahid, Xiangdong Liu
The development of the embryo sac is an important factor affecting seed setting in rice. Numerous genes associated with embryo sac (ES) development have been identified in plants. However, the function of the DEAD-box RNA helicase family genes on ES is poorly known in rice. Here, we characterized a rice DEAD-box protein, OsRH52A, which was localized in the nucleus and cytoplasm and highly expressed
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Redox regulation of epigenetic and epitranscriptomic gene regulatory pathways in plants J. Exp. Bot. (IF 6.9) Pub Date : 2024-04-20 Juline Auverlot, Avilien Dard, Julio Sáez-Vásquez, Jean-Philippe Reichheld
Developmental and environmental constraints influence genome expression through complex panels of regulatory mechanisms. Epigenetic modifications and remodelling of chromatin are some of the major actors regulating the dynamic of gene expression. Unravelling the factors relaying environmental signals to gene expression reprogramming under stress conditions is an important and fundamental question.
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Sugar sensing in C4 source leaves: a gap that needs to be filled J. Exp. Bot. (IF 6.9) Pub Date : 2024-04-20 Lily Chen, Oula Ghannoum, Robert T Furbank
Plant growth depends on sugar production and export by photosynthesising source leaves and sugar allocation and import by sink tissues (grains, roots, stems, young leaves). Photosynthesis and sink demand are tightly coordinated through metabolic (substrate, allosteric) feedback and signalling (sugar, hormones) mechanisms. Sugar signalling integrates sugar production with plant development and environmental
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Unique photosynthetic strategies employed by closely related Breviolum minutum strains under rapid short-term cumulative heat stress J. Exp. Bot. (IF 6.9) Pub Date : 2024-04-18 Pranali Deore, Sarah Jane Tsang Min Ching, Matthew R Nitschke, David Rudd, Douglas R Brumley, Elizabeth Hinde, Linda L Blackall, Madeleine J H van Oppen
The thermal tolerance of symbiodiniacean photo-endosymbionts largely underpins the thermal bleaching resilience of their cnidarian hosts such as corals and the coral model, Exaiptasia diaphana. While variation in thermal tolerance between species is well documented, variation between conspecific strains is understudied. We compared the thermal tolerance of three closely related strains of Breviolum
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Dare to be resilient: the key to future pesticide-free orchards? J. Exp. Bot. (IF 6.9) Pub Date : 2024-04-18 Marie Serrie, Fabienne Ribeyre, Laurent Brun, Jean-Marc Audergon, Bénédicte Quilot, Morgane Roth
In a context of urgent need for a more sustainable fruit tree production, it's high time to find durable alternatives to the systematic use of phytosanitary products in orchards. To this aim, resilience can deliver a number of benefits. Relying on a combination of tolerance, resistance and recovery traits, disease resilience appears as a corner stone to cope with the multiple pest and disease challenge
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Scaling of leaf area with biomass in trees reconsidered: constant metabolically active sapwood volume per unit leaf area with height growth J. Exp. Bot. (IF 6.9) Pub Date : 2024-04-18 Eapsa Berry, Tommaso Anfodillo, Matiss Castorena, Alberto Echeverría, Mark E Olson
Hypoallometric (slope<1) scaling between metabolic rate and body mass is often regarded as near-universal across organisms. However, there are compelling reasons to question hypoallometric scaling in woody plants, where metabolic rate=leaf area. This leaf area must provide carbon to the metabolically active sapwood volume (VMASW). Within populations of a species, variants in which VMASW increases per
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Delayed senescence and crop performance under stress: always a functional couple? J. Exp. Bot. (IF 6.9) Pub Date : 2024-04-18 Mariana Antonietta, Dana Martinez, Juan J Guiamet
Exposure to abiotic stresses accelerates leaf senescence in most crop plant species, thereby reducing photosynthesis and other assimilatory processes. In some cases, genotypes with delayed leaf senescence (i.e., “stay-greens”) show stress resistance, particularly in cases of water deficit, and this has led to the proposal that senescence delay improves crop performance under some abiotic stresses.
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GABA does not regulate stomatal CO2 signalling in Arabidopsis J. Exp. Bot. (IF 6.9) Pub Date : 2024-04-17 Adriane Piechatzek, Xueying Feng, Na Sai, Changyu Yi, Bhavna Hurgobin, Mathew Lewsey, Johannes Herrmann, Marcus Dittrich, Peter Ache, Tobias Müller, Johannes Kromdijk, Rainer Hedrich, Bo Xu, Matthew Gilliham
Optimal stomatal regulation is important for plant adaptation to changing environmental conditions and for maintaining crop yield. The guard-cell signal GABA is produced from glutamate by Glutamate Decarboxylase (GAD) during a reaction that generates carbon dioxide (CO2) as a by-product. Here, we investigated a putative connection between GABA signalling and the more clearly defined CO2 signalling
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Practical guide toward discovery of biomolecules with biostimulant activity J. Exp. Bot. (IF 6.9) Pub Date : 2024-04-17 Jing Li, Robin Lardon, Sven Mangelinckx, Danny Geelen
The growing demand for sustainable solutions in agriculture, critical for crop productivity and food quality in the face of climate change and reduced agrochemical usage, has brought biostimulants into the spotlight as valuable tools for regenerative agriculture. Due to their diverse biological activities, biostimulants contribute to crop growth, nutrient use efficiency, abiotic resilience, and soil
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Thermal Adaptation in Plants: Understanding the Dynamics of Translation Factors and Condensates J. Exp. Bot. (IF 6.9) Pub Date : 2024-04-17 Julia Lohmann, Oliver Herzog, Kristina Rosenzweig, Magdalena Weingartner
Plants, as sessile organisms, face the imperative challenge of adjusting growth and development with ever-changing environmental conditions. Protein synthesis is the fundamental process enabling growth of all organisms. Since elevated temperature stress poses a substantial threat to protein stability and function, immediate adjustments of protein synthesis rates are necessary to circumvent accumulation
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Growth conditions trigger genotype-specific metabolic responses that affect the nutritional quality of kale cultivars J. Exp. Bot. (IF 6.9) Pub Date : 2024-04-17 Hirofumi Ishihara, Sara Alegre, Jesús Pascual, Andrea Trotta, Wei Yang, Baoru Yang, Fatemeh Seyednasrollah, Meike Burow, Saijaliisa Kangasjärvi
Kales (Brassica oleracea convar acephala) are fast-growing, nutritious leafy vegetables ideal for year-round indoor farming. However, selection of best cultivars for growth under artificial lighting necessitates a deeper understanding of leaf metabolism in different kale types. Here we examined a curly leaved cultivar Half Tall and a lacinato type cultivar Black Magic under moderate growth light (130
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Interactions between the nitrate reductase 2 and catalase 1 fine-tune disease resistance in cassava J. Exp. Bot. (IF 6.9) Pub Date : 2024-04-16 Xueyi Zhang, Guoyin Liu, Rongjiao Zheng, Yu Yan, Haitao Shi
Cassava is one of the most important tuber crops that is used for food, starch and bio-energy. However, cassava is susceptible to a number of diseases, especially cassava bacterial blight (CBB). Nitric oxide (NO) and hydrogen peroxide (H2O2) regulate plant growth and development, as well as stress responses. However, no direct relationships between the enzymes involved in the metabolic enzymes that
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Plant Quiescence Strategy and Seed Dormancy under Hypoxia J. Exp. Bot. (IF 6.9) Pub Date : 2024-04-16 Chiara Pucciariello, Pierdomenico Perata
Summary Plant quiescence and seed dormancy can be triggered by reduced oxygen availability. Under water, oxygen depletion caused by flooding can culminate in a quiescent state, which is a plant strategy for energy preservation and survival. In adult plants, a quiescent state can be activated by sugar starvation, culminating in metabolic depression. In seeds, secondary dormancy can be activated by reduced
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Dissecting the causal polymorphism of the Lr67res multipathogen resistance gene J. Exp. Bot. (IF 6.9) Pub Date : 2024-04-15 Ricky J Milne, Katherine E Dibley, Jayakumar Bose, Adnan Riaz, Jianping Zhang, Wendelin Schnippenkoetter, Anthony R Ashton, Peter R Ryan, Stephen D Tyerman, Evans S Lagudah
Partial resistance to multiple biotrophic fungal pathogens in wheat (Triticum aestivum L.) is conferred by a variant of the Lr67 gene, which encodes a hexose-proton symporter. Two mutations (G144R, V387L) differentiate the resistant and susceptible protein variants (Lr67res and Lr67sus). Lr67res lacks sugar transport capability and was associated with anion transporter-like properties when expressed
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Crosstalk between ROP GTPase signaling and plant hormones J. Exp. Bot. (IF 6.9) Pub Date : 2024-04-12 Haoyu Tian, Ruohan Lv, Peishan Yi
Rho of Plants (ROPs) constitute a plant-specific subset of small guanine nucleotide-binding proteins within the Cdc42/Rho/Rac family. These versatile proteins regulate diverse cellular processes, including cell growth, cell division, cell morphogenesis, organ development, and stress responses. In recent years, the dynamic cellular and subcellular behaviors orchestrated by ROPs have unveiled a notable
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Residual water losses mediate the trade-off between growth and drought-survival across saplings of 12 tropical rainforest tree species with contrasting hydraulic strategies J. Exp. Bot. (IF 6.9) Pub Date : 2024-04-12 Camille Ziegler, Hervé Cochard, Clément Stahl, Louis Foltzer, Bastien Gérard, Jean-Yves Goret, Patrick Heuret, Sébastien Levionnois, Pascale Maillard, Damien Bonal, Sabrina Coste
Knowledge of the physiological mechanisms underlying species vulnerability to drought is critical to better understand patterns of tree mortality. Investigating plant adaptive strategies to drought should thus help to fill this knowledge gap, especially in tropical rainforests exhibiting high functional diversity. In a semi-controlled drought experiment on 12 rainforest tree species, we investigated
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Anatomical Limitations in Adventitious Root Formation Revealed by Magnetic Resonance Imaging, Infrared Spectroscopy, and Histology of Rose Genotypes with Contrasting Rooting Phenotypes J. Exp. Bot. (IF 6.9) Pub Date : 2024-04-12 David Wamhoff, André Gündel, Steffen Wagner, Stefan Ortleb, Ljudmilla Borisjuk, Traud Winkelmann
Adventitious root (AR) formation is one of the most important developmental processes in vegetative propagation. Although genotypic differences in rooting ability of rose are well known, the causing factors are not well understood. The rooting of two contrasting genotypes, 'Herzogin Friederike' and 'Mariatheresia', was compared following a multiscale approach. Using magnetic resonance imaging, we noninvasively
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Vesicle trafficking pathways in defence-related cell wall modifications - papillae and encasements J. Exp. Bot. (IF 6.9) Pub Date : 2024-04-12 Mads Eggert Nielsen
Filamentous pathogens that cause plant diseases such as powdery mildew, rust, anthracnose, and late blight continue to represent an enormous challenge for farmers worldwide. Interestingly, these pathogens, although phylogenetically distant, initiate pathogenesis in a very similar way by penetrating the cell wall and establishing a feeding structure inside the plant host-cell. To prevent pathogen ingress
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Genetic factors acting prior to dormancy in sour cherry influence bloom time the following spring J. Exp. Bot. (IF 6.9) Pub Date : 2024-04-11 Charity Z Goeckeritz, Chloe Grabb, Rebecca Grumet, Amy F Iezzoni, Courtney A Hollender
Understanding the process of Prunus species floral development is crucial for developing strategies to manipulate bloom time and prevent crop loss due to climate change. Here, we present a detailed examination of flower development from initiation until bloom for early- and late-blooming sour cherries (Prunus cerasus) from a population segregating for a major bloom time QTL on chromosome 4. Using a
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Counteraction of ABI5-mediated inhibition of seed germination and postgerminative growth by RACK1 in Arabidopsis J. Exp. Bot. (IF 6.9) Pub Date : 2024-04-10 Zhiyong Li, Dayan Zhang, Xiaoju Liang, Jiansheng Liang
ABSCISIC ACID (ABA) INSENSITIVE5 (ABI5), the key regulator of abscisic acid (ABA) signaling pathway, plays a fundamental role in seed germination and postgerminative development. However, the detailed molecular mechanism underlying the repression function of ABI5 in these processes remains to be elucidated. In this study, we demonstrate that the conserved eukaryotic WD40 repeat protein RACK1 is a novel
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Perspectives on embryo maturation and seed quality in a global climate change scenario J. Exp. Bot. (IF 6.9) Pub Date : 2024-04-09 Viviana Escudero, Marlene Fuenzalida, Enrico L Rezende, Manuel González-Guerrero, Hannetz Roschzttardtz
Global climate change has already brought noticeable alterations to multiple regions of our planet. Several important steps of plant growth and development, such as embryogenesis, can be affected by environmental changes. For instance, these changes would affect how stored nutrients are used during early stages of seed germination as it transitions from a heterotrophic to autotrophic metabolism, a
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Cytoskeleton remodeling: a central player in plant-fungus interactions J. Exp. Bot. (IF 6.9) Pub Date : 2024-04-09 Jyotsna Sinha, Yeshveer Singh, Praveen Kumar Verma
The eukaryotic cytoskeleton is a complex scaffold consisting of actin filaments, intermediate filaments, and microtubules. Though fungi and plants lack intermediate filaments, the dynamic structural network of actin filaments and microtubules regulates cell shape, division, polarity, and vesicular trafficking in both. However, the specialized functions of the cytoskeleton during plant-fungus interactions
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Experimental approaches to studying translation in plant semi-autonomous organelles J. Exp. Bot. (IF 6.9) Pub Date : 2024-04-08 Malgorzata Kwasniak-Owczarek, Hanna Janska
Plant mitochondria and chloroplasts are semi-autonomous organelles originated from free-living bacteria and retaining respective reduced genomes during evolution. As a consequence, relatively few of the mitochondrial and chloroplast proteins are encoded in the organellar genomes and synthesized by the organellar ribosomes. Since the both organellar genomes encode mainly components of the energy transduction
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Deciphering molecular events behind Systemin-induced resistance against Botrytis cinerea in tomato plants J. Exp. Bot. (IF 6.9) Pub Date : 2024-04-06 Julia Pastor-Fernández, Neus Sanmartín, Maria Manresa, Cédric Cassan, Pierre Pétriacq, Yves Gibon, Jordi Gamir, Beatriz Romero Rodriguez, Araceli G Castillo, Miguel Cerezo, Victor Flors, Paloma Sánchez-Bel
Plant defense peptides are paramount endogenous danger signals secreted after a challenge intensifying the plant immune response. The peptidic hormone Systemin (Sys) was shown to participate in resistance in several plant-pathosystems, although the mechanisms behind Sys-IR when exogenously applied remain elusive. We performed proteomic, metabolomic and enzymatic studies to decipher the Sys-induced
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NADPH oxidase-mediated sulfenylation of cysteine derivatives regulates plant immunity J. Exp. Bot. (IF 6.9) Pub Date : 2024-04-04 Yuta Hino, Taichi Inada, Miki Yoshioka, Hirofumi Yoshioka
Reactive oxygen species (ROS) are rapidly generated during plant immune responses by respiratory burst oxidase homolog (RBOH), which is a plasma membrane-localized NADPH oxidase. Although regulatory mechanisms of RBOH activity have been well documented, the ROS-mediated downstream signaling is unclear. We here demonstrated that ROS sensor proteins play a central role in ROS signaling via oxidative
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Accounting for photosystem I photoinhibition sheds new light on seasonal acclimation strategies of boreal conifers J. Exp. Bot. (IF 6.9) Pub Date : 2024-04-04 Steffen Grebe, Albert Porcar-Castell, Anu Riikonen, Virpi Paakkarinen, Eva-Mari Aro
Summary The photosynthetic acclimation of boreal evergreen conifers is controlled by regulatory and photoprotective mechanisms that allow conifers to cope with extreme environmental changes. However, the underlying dynamics of photosystem II (PSII) and photosystem I (PSI) remain unresolved. Here, we investigated the dynamics of PSII and PSI during the spring recovery of photosynthesis in Pinus sylvestris
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Identification of hub genes involved in GA-regulated coleoptile elongation under submerged germinations in rice J. Exp. Bot. (IF 6.9) Pub Date : 2024-04-04 Yunfei Hu, Mingqing Ma, Wenlong Zhao, Pengwei Niu, Rongbai Li, Jijing Luo
Submergence stress hinders the direct seeding in rice cultivation. Rapid elongation of rice seed coleoptiles to reach the water surface enables rice to survive submergence stress. Gibberellin (GA) positively influences rice growth. However, the molecular mechanisms underlying GA-regulated coleoptile elongation under submergence conditions remain unclear. Here, we performed a WGCNA analysis to preliminarily
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Nitric oxide, energy and redox-dependent responses to hypoxia J. Exp. Bot. (IF 6.9) Pub Date : 2024-04-01 Sanjib Bal Samant, Nidhi Yadav, Jagannath Swain, Josepheena Joseph, Aprajita Kumari, Afsana Praveen, Ranjan Kumar Sahoo, Girigowda Manjunatha, Chandra Shekar Seth, Sneh Lata Singla-Pareek, Christine H Foyer, Ashwani Pareek, Kapuganti Jagadis Gupta
Hypoxia occurs when the oxygen levels fall below the levels required for mitochondria to support respiration. Regulated hypoxia is associated with quiescence, particularly in storage organs (seeds) and stem cell niches. In contrast, environmentally-induced hypoxia poses significant challenges for metabolically-active cells that are adapted to aerobic respiration. The perception of oxygen availability
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Modelling metabolic fluxes of tomato stems reveals that nitrogen shapes central metabolism for defence against Botrytis cinerea J. Exp. Bot. (IF 6.9) Pub Date : 2024-03-29 Nathalie Lacrampe, Raphaël Lugan, Doriane Dumont, Philippe C Nicot, François Lecompte, Sophie Colombié
Among plant pathogens, the necrotrophic fungus Botrytis cinerea is one of the most prevalent, leading to severe crop damage. Studies related to its colonization of different plant species have reported variable host metabolic responses to infection. In tomato, high N availability leads to decreased susceptibility. Metabolic flux analysis can be used as an integrated method to better understand which
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Genome-wide association studies and transcriptomics reveal mechanisms explaining the diversity of wheat root responses to nutrient availability J. Exp. Bot. (IF 6.9) Pub Date : 2024-03-29 Suhaib Ahmad, Hafiza Madeeha Khan, Amjad Nawaz, Muhammad Abdul Samad, Huikyong Cho, Hira Sarfraz, Yasir Aziz, Hatem Rouached, Zaigham Shahzad
Nutrient availability profoundly influences plant root system architecture, which critically determines crop productivity. While Arabidopsis has provided important insights into the genetic responses to nutrient deficiency, translating this knowledge to crops, particularly wheat, remains a subject of inquiry. Here, examining a diverse wheat population under varying nitrogen (N), phosphorus (P), potassium
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Molecular and genetic regulation of petal number variation in plants J. Exp. Bot. (IF 6.9) Pub Date : 2024-03-28 Dan Wang, Xue Dong, Mi-Cai Zhong, Xiao-Dong Jiang, Wei-Hua Cui, Mohammed Bendahmane, Jin-Yong Hu
Floral forms with an increased number of petals, also known as double flower (DF) with great agronomic and economic values, have been selected and conserved in many domesticated plants, particularly in ornamentals. The molecular and genetic mechanisms that control this trait are therefore a hot topic, not only for scientists, but also for breeders. In this review, we summarize the current knowledge
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Aintegumenta And Redundant Aintegumenta-Like6 Are Required For Bract Outgrowth In Arabidopsis J. Exp. Bot. (IF 6.9) Pub Date : 2024-03-27 Darren Manuela, Mingli Xu
Plants consist of fundamental units of growth called phytomers (leaf or bract, axillary bud, node, and internode), which are repeated and modified throughout shoot development to give plants plasticity for survival and adaptation. One phytomer modification is the suppression or outgrowth of bracts, the leaves subtending the flowers. The floral meristem identity regulator LEAFY (LFY) and the organ boundary
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Combining modelling and experimental approaches to assess the feasibility of developing rice-oil palm agroforestry system J. Exp. Bot. (IF 6.9) Pub Date : 2024-03-27 Raphaël P A Perez, Rémi Vezy, Romain Bordon, Thomas Laisné, Sandrine Roques, Maria-Camila Rebolledo, Lauriane Rouan, Denis Fabre, Olivier Gibert, Marcel De Raissac
Monoculture systems in SouthEast Asia are facing challenges due to climate change-induced extreme weather conditions, leading to significant annual production losses for rice and oil palm. To ensure the stability of these crops, innovative strategies like resilient agroforestry systems need to be explored. Converting oil palm monocultures to rice-based intercropping systems shows promise, but achieving
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NACs strike again: NOR-like1 is responsible for cuticle development in tomato fruit J. Exp. Bot. (IF 6.9) Pub Date : 2024-03-27 Nigel E Gapper
This article comments on: Liu G-S, Huang H, Grierson D, Gao Y, Ji X, Peng Z-Z, Li H-L, Niu X-L, Jia W, He J-L, Xiang L-T, Gao H-Y, Qu G-Q, Zhu H-L, Zhu B-Z, Luo Y-B, Fu D-Q. 2024. NAC transcription factor SlNOR-like1 plays a dual regulatory role in tomato fruit cuticle formation. Journal of Experimental Botany 75, 1903–1918.
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Breaking boundaries: a novel role for CUC genes in sex determination in cucurbits J. Exp. Bot. (IF 6.9) Pub Date : 2024-03-27 Margaret Anne Pelayo, Frank Wellmer
This article comments on: Segura M, García A, Gamarra G, Benítez A, Iglesias-Moya J, Martínez C, Jamilena M. 2024. An miR164-resistant mutation in the transcription factor gene CpCUC2B enhances carpel arrest and ectopic boundary specification in Cucurbita pepo flower development. Journal of Experimental Botany 75, 1948–1966.
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More than a photoreceptor: aureochromes are intrinsic to the diatom light-regulated transcriptional network J. Exp. Bot. (IF 6.9) Pub Date : 2024-03-27 Sacha N Coesel
This article comments on: Im SH, Lepetit B, Mosesso N, Shrestha S, Weiss L, Nymark M, Roellig R, Wilhelm C, Isono E, Kroth PG. 2024. Identification of promoter targets by Aureochrome 1a in the diatom Phaeodactylum tricornutum. Journal of Experimental Botany 75, 1834–1851.
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Carbohydrate distribution via SWEET17 is critical for Arabidopsis inflorescence branching under drought J. Exp. Bot. (IF 6.9) Pub Date : 2024-03-26 Marzieh Valifard, Azkia Khan, Johannes Berg, Rozenn Le Hir, Benjamin Pommerrenig, H Ekkehard Neuhaus, Isabel Keller
Sugars Will Eventually be Exported Transporters (SWEETs) are the most recently discovered family of plant sugar transporters. By acting as uniporters, SWEETs facilitate the diffusion of sugars across cell membranes and play an important role in various physiological processes such as abiotic stress adaptation. AtSWEET17, a vacuolar fructose facilitator, was shown to be involved in the modulation of
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Recent advances in UV-B signalling: interaction of proteins with the UVR8 photoreceptor J. Exp. Bot. (IF 6.9) Pub Date : 2024-03-25 Wei Liu, Gareth I Jenkins
The photoreceptor UVR8 mediates many plant responses to UV-B and short wavelength UV-A light. UVR8 functions through interactions with other proteins which lead to extensive changes in gene expression. Interactions with particular proteins determine the nature of the response to UV-B. It is therefore important to understand the molecular basis of these interactions: how are different proteins able
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Shaping leaves through TALE homeodomain transcription factors J. Exp. Bot. (IF 6.9) Pub Date : 2024-03-25 Mary E Byrne, Eleanor Imlay, Nazuratul Nabilah Binti Ridza
The first TALE homeodomain transcription factor to be described in plants was maize knotted1 (kn1). Dominant mutations in kn1 disrupt leaf development with abnormal knots of tissue forming in the leaf blade. kn1 was found to be expressed in the shoot meristem but not in a peripheral region that gives rise to leaves. Furthermore, KN1 and closely related proteins were excluded from initiating and developing
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Comprehensive LC-MS/MS Analysis of Nitrogen-Related Plant Metabolites J. Exp. Bot. (IF 6.9) Pub Date : 2024-03-25 Sanja Ćavar Zeljković, Nuria De Diego, Lukáš Drašar, Jaroslav Nisler, Libor Havlíček, Lukáš Spíchal, Petr Tarkowski
We have developed and validated a novel LC-MS/MS method for simultaneously analyzing amino acids, biogenic amines, and their acetylated and methylated derivatives in plants. This method involves a one-step extraction of 2-5 mg of lyophilized plant material followed by fractionation of different biogenic amine forms and exploits an efficient combination of hydrophilic interaction chromatography (HILIC)
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Comparative transcriptomics illuminates the cellular responses of an aeroterrestrial zygnematophyte to UV radiation J. Exp. Bot. (IF 6.9) Pub Date : 2024-03-23 Anna Busch, Jennifer V Gerbracht, Kevin Davies, Ute Hoecker, Sebastian Hess
The zygnematophytes are the closest relatives of land plants and comprise several lineages that adapted to a life on land. Species of the genus Serritaenia form colorful, mucilaginous capsules, which surround the cells and block harmful solar radiation, one of the major terrestrial stressors. In eukaryotic algae, this “sunscreen mucilage” represents a unique photoprotective strategy, whose induction
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Chemical and transcriptomic analysis of leaf trichomes from Cistus creticus subsp. creticus reveal the biosynthetic pathways of certain labdane-type diterpenoids and their acetylated forms J. Exp. Bot. (IF 6.9) Pub Date : 2024-03-23 Antigoni S Papanikolaou, Dimitra Papaefthimiou, Dragana Matekalo, Christina-Vasiliki Karakousi, Antonios M Makris, Angelos K Kanellis
Labdane-related diterpenoids (LRDs), a subgroup of terpenoids, exhibit structural diversity and significant commercial and pharmacological potential. LRDs share the characteristic decalin-labdanic core structure that derives from the cycloisomerization of geranylgeranyl diphosphate (GGPP). Labdanes derive their name from the oleoresin known as "Labdanum," "Ladano" or "Aladano, used since ancient Greek
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Are high-throughput root phenotyping platforms suitable for informing root system architecture models with genotype-specific parameters? An evaluation based on the root model ArchiSimple and a small panel of wheat cultivars J. Exp. Bot. (IF 6.9) Pub Date : 2024-03-22 Hong Anh Nguyen, Pierre Martre, Clothilde Collet, Xavier Draye, Christophe Salon, Christian Jeudy, Renaud Rincent, Bertrand Muller
Given the difficulties in accessing plant roots in situ, high-throughput root phenotyping (HTRP) platforms under controlled conditions have been developed to meet the growing demand for characterizing root system architecture (RSA) for genetic analyses. However, a proper evaluation of their capacity to provide the same estimates for strictly identical root traits across platforms has never been achieved
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Mechanism of oxalate decarboxylase Oxd_S12 from Bacillus velezensis BvZ45-1 in defense against cotton verticillium wilt J. Exp. Bot. (IF 6.9) Pub Date : 2024-03-22 Ying Sun, Na Yang, Sirui Li, Fei Chen, Yijing Xie, Canming Tang
Verticillium wilt, a soilborne vascular disease caused by Verticillium dahliae, strongly affects cotton yield and quality. In this study, an isolated rhizosphere bacterium, designated Bacillus velezensis BvZ45-1, exhibited greater than 46% biocontrol efficacy against cotton verticillium wilt under greenhouse and field conditions. Moreover, through crude protein extraction and mass spectrometry analysis
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Higher order polyploids exhibit enhanced desiccation tolerance in the grass Microchloa caffra J. Exp. Bot. (IF 6.9) Pub Date : 2024-03-21 Rose A Marks, Paula Delgado, Givemore Munashe Makonya, Keren Cooper, Robert VanBuren, Jill M Farrant
Desiccation tolerance evolved recurrently across diverse plant lineages to enable survival in water limited conditions. Many resurrection plants are polyploid and several groups have hypothesized that polyploidy contributed to the evolution of desiccation tolerance. However, due to the vast phylogenetic distance between resurrection plant lineages, the rarity of desiccation tolerance, and the prevalence
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Defective mutations of SlSGR1, SlPSY1 and MYB12 genes lead to formation of green ripe fruit in tomato J. Exp. Bot. (IF 6.9) Pub Date : 2024-03-20 Long Cui, Fangyan Zheng, Changxing Li, Guobin Li, Jie Ye, Yuyang Zhang, Taotao Wang, Zonglie Hong, Zhibiao Ye, Junhong Zhang
Modern tomatoes produce colourful mature fruits, but many wild tomato ancestors form green or gray green ripe fruits. In this study, tomato cultivar ‘Lvbaoshi’ (LBS) that produces green ripe fruits was found to contain three recessive loci that were responsible for development of green ripe fruits. The colourless peel of LBS fruits was caused by a 603-bp deletion in the promoter of SlMYB12. The candidate
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Identification and characterization of two O-methyltransferases involved in methylated 2-(2-phenethyl) chromones biosynthesis in agarwood J. Exp. Bot. (IF 6.9) Pub Date : 2024-03-18 Wenli Wu, Tingting Yan, Xiaochen Sun, Iain Wilson, Gaiyun Li, Zhou Hong, Fenjuan Shao, Deyou Qiu
The 2-(2-phenethyl)chromones (PECs) are the signature constituents responsible for the fragrance and pharmacological properties of agarwood. O-methyltransferases (OMTs) are necessary for the methylated PECs biosynthesis, however, there is little information known about OMTs in Aquilaria sinensis. In this study, we identified 29 OMT genes from the A. sinensis genome. Expression analysis showed they
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Overexpressing PagGS1;2 maintains carbon and nitrogen balance under high-ammonium conditions and shows increased tolerance to ammonium toxicity in 84K Poplar J. Exp. Bot. (IF 6.9) Pub Date : 2024-03-18 Xue Leng, Hanzeng Wang, Lina Cao, Ruihui Chang, Shuang Zhang, Caifeng Xu, Jiajie Yu, Xiuyue Xu, Chunpu Qu, Zhiru Xu, Guanjun Liu
In plants, the glutamine synthetase – glutamic acid synthetase (GS/GOGAT) cycle plays important roles in nitrogen metabolism, growth, development, and stress resistance. Excess ammonium (NH4+) restricts plant growth, but GS can help to alleviate NH4+ toxicity. In this study, 84K poplar (Populus alba × P. glandulosa) showed reduced biomass accumulation and leaf chlorosis under high-NH4+ stress. These
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Beneficial rhizobacterium Bacillus velezensis SQR9 regulates plant nitrogen uptake via endogenous signaling pathway J. Exp. Bot. (IF 6.9) Pub Date : 2024-03-18 Yu Chen, Yucong Li, Yansong Fu, Letian Jia, Lun Li, Zhihui Xu, Nan Zhang, Yunpeng Liu, Xiaorong Fan, Wei Xuan, Guohua Xu, Ruifu Zhang
Nitrogen fertilizer is widely used in agriculture to boost crop yields, plant growth-promoting rhizobacteria (PGPRs) can increase plant nitrogen use efficiency through nitrogen fixation and organic nitrogen mineralization. However, it is not known if they can activate the plant uptake of nitrogen. In this study, we investigated the effects of a PGPR strain Bacillus velezensis SQR9-emitted volatile
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Dorsoventrally asymmetric expression of miR319/TCP generates dorsal-specific venation patterning in petunia corolla tube J. Exp. Bot. (IF 6.9) Pub Date : 2024-03-16 Bin Zhang, Xiaoting Qin, Yao Han, Mingyang Li, Yulong Guo
Vein-associated pigmentation (Venation) is a type of floral coloration adopted by plants to attract pollinators. Several petunia (Petunia hybrida) lines generate dorsoventrally asymmetric venation patterning of the corolla tube, in which venation is only presents in the dorsal tube. The molecular mechanism underlying this trait is unknown. Here, we demonstrate that miR319 is preferentially expressed
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A tomato B-box protein regulates plant development and fruit quality through the interaction with PIF4, HY5 and RIN transcription factors J. Exp. Bot. (IF 6.9) Pub Date : 2024-03-16 Lumi Shiose, Juliene dos Reis Moreira, Bruno Silvestre Lira, Gabriel Ponciano, Gabriel Gomez Ocampo, Raquel Tsu Ay Wu, José Laurindo dos Santos Júnior, Nikolaos Ntelkis, Elke Clicque, Maria José Oliveira, Greice Lubini, Eny Iochevet Segal Floh, Javier Francisco Botto, Marcelo José Pena Ferreira, Alain Goossens, Luciano Freschi, Magdalena Rossi
During the last decade, the knowledge about BBX proteins has abruptly increased. Genome-wide studies identified BBX gene family in several ornamental, industry and food crops; however, the reports regarding the role of these genes as regulators of agronomically important traits are scarce. Here, by phenotyping a knockout mutant, we performed a comprehensive functional characterization of the tomato