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The impact of multifactorial stress combination on plant growth and survival New Phytol. (IF 8.512) Pub Date : 2021-01-26 Sara I. Zandalinas; Soham Sengupta; Felix B. Fritschi; Rajeev K. Azad; Rachel Nechushtai; Ron Mittler
Climate change‐driven extreme weather events, combined with increasing temperatures, harsh soil conditions, low water availability and quality, and the introduction of many man‐made pollutants, pose a unique challenge to plants. Although our knowledge of the response of plants to each of these individual conditions is vast, we know very little about how a combination of many of these factors, occurring
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Drought by CO2 interactions in trees: a test of the water savings mechanism New Phytol. (IF 8.512) Pub Date : 2021-01-26 Mingkai Jiang; Jeff W.G. Kelly; Brian J. Atwell; David T. Tissue; Belinda E. Medlyn
● Elevated atmospheric CO2 (eCa) may benefit plants during drought by reducing stomatal conductance (gs) but any ‘water savings effect’ could be neutralized by concurrent stimulation of leaf area. We investigated whether eCa enhanced water savings, thereby ameliorating the impact of drought on carbon and water relations in trees. ● We report leaf‐level gas exchange and whole‐plant and soil water relations
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CHYR1 ubiquitinates the phosphorylated WRKY70 for degradation to balance immunity in Arabidopsis thaliana New Phytol. (IF 8.512) Pub Date : 2021-01-25 Huanhuan Liu; Bao Liu; Shangling Lou; Hao Bi; Hu Tang; Shaofei Tong; Song Yan; Ningning Chen; Han Zhang; Yuanzhong Jiang; Jianquan Liu
It is critically important for plants to control the trade‐off between normal growth and pathogen immunity. However, the underlying molecular mechanism remains largely unknown. Here we report such a mechanism controlled by WRKY70 and its partner CHYR1 in Arabidopsis. We found that both levels of the WRKY70 target gene SARD1 and the phosphorylated forms of WRKY70 were increased in WRKY70OE plants upon
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Polyploid phylogenetics New Phytol. (IF 8.512) Pub Date : 2021-01-25 Carl J. Rothfels
Polyploidy is a dominant feature of extant plant diversity. However, major research questions, including whether polyploidy is important to long‐term evolution or is just ‘evolutionary noise’, remain unresolved due to difficulties associated with the generation and analysis of data from polyploid lineages. Many of these difficulties have been recently overcome, such that it is now often relatively
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Spatiotemporal patterns of intracellular Ca2+ signalling govern hypo‐osmotic stress resilience in marine diatoms New Phytol. (IF 8.512) Pub Date : 2021-01-24 Katherine E. Helliwell; Friedrich H. Kleiner; Hayley Hardstaff; Abdul Chrachri; Trupti Gaikwad; Deborah Salmon; Nicholas Smirnoff; Glen L. Wheeler; Colin Brownlee
Diatoms are globally important phytoplankton that dominate coastal and polar‐ice assemblages. These environments exhibit substantial changes in salinity over dynamic spatiotemporal regimes. Rapid sensory systems are vital to mitigate the harmful consequences of osmotic stress. Population‐based analyses have suggested that Ca2+ signalling is involved in diatom osmotic sensing. However, mechanistic insight
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The role of silicon in the development of complex crystal shapes in coccolithophores New Phytol. (IF 8.512) Pub Date : 2021-01-23 Gerald Langer; Alison R. Taylor; Charlotte E. Walker; Erin M. Meyer; Oz Ben Joseph; Assaf Gal; Glenn M. Harper; Ian Probert; Colin Brownlee; Glen L. Wheeler
The development of calcification by the coccolithophores had a profound impact on ocean carbon cycling, but the evolutionary steps leading to the formation of these complex biomineralised structures are not clear. Heterococcoliths consisting of intricately‐shaped calcite crystals are formed intracellularly by the diploid life cycle phase. Holococcoliths consisting of simple rhombic crystals can be
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Insect species richness affects plant responses to multi‐herbivore attack New Phytol. (IF 8.512) Pub Date : 2021-01-23 Maite Fernández de Bobadilla; Mitchel E. Bourne; Janneke Bloem; Sarah N. Kalisvaart; Gerrit Gort; Marcel Dicke; Erik H. Poelman
Plants are often attacked by multiple insect herbivores. How plants deal with an increasing richness of attackers from a single or multiple feeding guilds is poorly understood. We subjected black mustard (Brassica nigra) plants to 51 treatments representing attack by an increasing species richness (1, 2 or 4 species) of either phloem feeders, leaf chewers, or a mix of both feeding guilds when keeping
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Pollen sterols are associated with phylogeny and environment but not with pollinator guilds New Phytol. (IF 8.512) Pub Date : 2021-01-23 Pengjuan Zu; Hauke Koch; Orlando Schwery; Samuel Pironon; Charlotte Phillips; Ian Ondo; Iain W. Farrell; W. David Nes; Elynor Moore; Geraldine A. Wright; Dudley I. Farman; Philip C. Stevenson
Phytosterols are primary plant metabolites that have fundamental structural and regulatory functions. They are also essential nutrients for phytophagous insects, including pollinators, that cannot synthesize sterols. Despite the well‐described composition and diversity in vegetative plant tissues, few studies have examined phytosterol diversity in pollen.
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Genetic architecture and adaptation of flowering time among environments New Phytol. (IF 8.512) Pub Date : 2021-01-23 Wenjie Yan; Baosheng Wang; Emily Chan; Thomas Mitchell‐Olds
The genetic basis of flowering time changes across environments, and pleiotropy may limit adaptive evolution of populations in response to local conditions. However, little is known about how genetic architecture changes among environments.
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Deciduous and evergreen oaks show contrasting adaptive responses in leaf mass per area across environments New Phytol. (IF 8.512) Pub Date : 2020-12-19 Domingo Sancho‐Knapik; Alfonso Escudero; Sonia Mediavilla; Christine Scoffoni; Joseph Zailaa; Jeannine Cavender‐Bares; Tomás Gómez Álvarez‐Arenas; Arántzazu Molins; David Alonso‐Forn; Juan Pedro Ferrio; José Javier Peguero‐Pina; Eustaquio Gil‐Pelegrín
Increases in leaf mass per area (LMA) are commonly observed in response to environmental stresses and are achieved through increases in leaf thickness and/or leaf density. Here, we investigated how the two underlying components of LMA differ in relation to species native climates and phylogeny, across deciduous and evergreen species. Using a phylogenetic approach, we quantified anatomical, compositional
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Maternal effects shape the seed mycobiome in Quercus petraea New Phytol. (IF 8.512) Pub Date : 2020-12-20 Tania Fort; Charlie Pauvert; Amy E. Zanne; Otso Ovaskainen; Thomas Caignard; Matthieu Barret; Stéphane Compant; Arndt Hampe; Sylvain Delzon; Corinne Vacher
The tree seed mycobiome has received little attention despite its potential role in forest regeneration and health. The aim of the present study was to analyze the processes shaping the composition of seed fungal communities in natural forests as seeds transition from the mother plant to the ground for establishment. We used metabarcoding approaches and confocal microscopy to analyze the fungal communities
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Role of a vacuolar iron transporter OsVIT2 in the distribution of iron to rice grains New Phytol. (IF 8.512) Pub Date : 2021-01-21 Jing Che; Naoki Yamaji; Jian Feng Ma
Iron (Fe) from rice grains is a major source of dietary intake; however, the molecular mechanisms responsible for loading of Fe to the grains are poorly understood. We functionally characterized a vacuolar iron transporter gene, OsVIT2 in terms of expression pattern, cellular localization, and mutant phenotypes. OsVIT2 was expressed in the parenchyma cell bridges of nodes, in the mestome sheath of
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Environmental and developmental factors driving xylem anatomy and micro‐density in black spruce New Phytol. (IF 8.512) Pub Date : 2021-01-21 Valentina Buttò; Philippe Rozenberg; Annie Deslauriers; Sergio Rossi; Hubert Morin
Wood density is the product of carbon allocation for structural growth and reflects the trade‐off between mechanical support and water conductivity. We tested a conceptual framework based on the assumption that micro‐density depends on direct and indirect relationships with endogenous and exogenous factors. The dynamics of wood formation, including timings and rates of cell division, cell enlargement
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Regulation of Flowering Time by Ambient Temperature: Repressing the Repressors and Activating the Activators New Phytol. (IF 8.512) Pub Date : 2021-01-21 Suhyun Jin; Ji Hoon Ahn
Plants display remarkable developmental flexibility as they continuously sense and respond to changes in their environment. This flexibility allows them to select the optimal timing for critical developmental decisions such as when to flower. Ambient temperature is a major environmental factor that influences flowering; the mechanisms involved in ambient temperature‐responsive flowering have attracted
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HOMEODOMAIN PROTEIN8 Mediates Jasmonate‐Triggered Trichome Elongation in Tomato New Phytol. (IF 8.512) Pub Date : 2021-01-21 Bing Hua; Jiang Chang; Zhijing Xu; Xiaoqian Han; Mengyuan Xu; Meina Yang; Changxian Yang; Zhibiao Ye; Shuang Wu
Plant hormones can adjust the physiology and development of plants to enhance their adaption to biotic and abiotic challenges. Jasmonic Acid (JA), one of the immunity hormones in plants, triggers genome‐wide transcriptional changes in response to insect attack and wounding. Although JA is known to affect the development of trichomes, epidermal appendages that form a protective barrier against various
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Desmethyl butenolides are optimal ligands for karrikin receptor proteins New Phytol. (IF 8.512) Pub Date : 2021-01-21 Jiaren Yao; Adrian Scaffidi; Yongjie Meng; Kim T Melville; Aino Komatsu; Aashima Khosla; David C Nelson; Junko Kyozuka; Gavin R Flematti; Mark T Waters
Strigolactones and karrikins are butenolide molecules that regulate plant growth. They are perceived via the α/β‐hydrolase DWARF14 (D14) and its homologue KARRIKIN INSENSITIVE2 (KAI2), respectively. Plant‐derived strigolactones have a butenolide ring with a methyl group that is essential for bioactivity. By contrast, karrikins are abiotic in origin, and the butenolide methyl group is non‐essential
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Aphid feeding induces the relaxation of epigenetic control and the associated regulation of the defense response in Arabidopsis New Phytol. (IF 8.512) Pub Date : 2021-01-21 Maria Luz Annacondia; Dimitrije Markovic; Juan Luis Reig‐Valiente; Vassilis Scaltsoyiannes; Corné M.J. Pieterse; Velemir Ninkovic; R. Keith Slotkin; German Martinez
Environmentally induced changes in the epigenome help individuals to quickly adapt to fluctuations in the conditions of their habitats. We explored those changes in Arabidopsis thaliana plants subjected to multiple biotic and abiotic stresses, and identified transposable element (TE) activation in plants infested with the green peach aphid, Myzus persicae. We performed a genome‐wide analysis mRNA expression
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The Arabidopsis condensin CAP‐D subunits arrange interphase chromatin New Phytol. (IF 8.512) Pub Date : 2021-01-21 Celia Municio; Wojciech Antosz; Klaus D. Grasser; Etienne Kornobis; Michiel Van Bel; Ignacio Eguinoa; Frederik Coppens; Andrea Bräutigam; Inna Lermontova; Astrid Bruckmann; Katarzyna Zelkowska; Andreas Houben; Veit Schubert
Condensins are best known for their role in shaping chromosomes. However, other functions as organizing interphase chromatin and transcriptional control have been reported in yeasts and animals, but little is known about their function in plants. To elucidate the specific composition of condensin complexes and the expression of CAP‐D2 (condensin I) and CAP‐D3 (condensin II) we performed biochemical
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Stable, fertile lines produced by hybridisation between allotetraploids Brassica juncea (AABB) and B. carinata (BBCC) have merged the A and C genomes New Phytol. (IF 8.512) Pub Date : 2021-01-21 Elvis Katche; Roman Gaebelein; Zurianti Idris; Paula Vasquez‐Teuber; Yu‐tzu Lo; David Nugent; Jacqueline Batley; Annaliese S. Mason
Many flowering plant taxa contain allopolyploids which share one or more genomes in common. In the Brassica genus, crop species B. juncea and B. carinata share the B genome, with 2n = AABB and 2n = BBCC genome complements respectively. Hybridization results in 2n = BBAC hybrids, but the fate of these hybrids over generations of self‐pollination has never been reported. We produced and characterised
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Horizontal chromosome transfer and independent evolution drive diversification in Fusarium oxysporum f. sp. fragariae New Phytol. (IF 8.512) Pub Date : 2020-12-08 Peter M. Henry; Dominique D.A. Pincot; Bradley N. Jenner; Celia Borrero; Manuel Aviles; Myeong‐Hyeon Nam; Lynn Epstein; Steven J. Knapp; Thomas R. Gordon
The genes required for host‐specific pathogenicity in Fusarium oxysporum can be acquired through horizontal chromosome transfer (HCT). However, it is unknown if HCT commonly contributes to the diversification of pathotypes. Using comparative genomics and pathogenicity phenotyping, we explored the role of HCT in the evolution of F. oxysporum f. sp. fragariae, the cause of Fusarium wilt of strawberry
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PIF3/HY5 module regulates BBX11 to suppress protochlorophyllide levels in dark and promote photomorphogenesis in light New Phytol. (IF 8.512) Pub Date : 2020-12-17 Nikhil Job; Sourav Datta
Greening of cotyledons during de‐etiolation is critical for harvesting light energy and sustaining plant growth. PIF3 and HY5 antagonistically regulate protochlorophyllide synthesis in the dark. However, the mechanism by which the PIF3/HY5 module regulates genes involved in protochlorophyllide synthesis is not clear. Using genetic, molecular and biochemical techniques we identified that the B‐BOX protein
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Agricultural land use disrupts biodiversity mediation of virus infections in wild plant populations New Phytol. (IF 8.512) Pub Date : 2020-12-20 Hanna Susi; Anna‐Liisa Laine
Human alteration of natural habitats may change the processes governing species interactions in wild communities. Wild populations are increasingly impacted by agricultural intensification, yet it is unknown whether this alters biodiversity mediation of disease dynamics. We investigated the association between plant diversity (species richness, diversity) and infection risk (virus richness, prevalence)
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A mis‐regulated cyclic nucleotide‐gated channel mediates cytosolic calcium elevation and activates immunity in Arabidopsis New Phytol. (IF 8.512) Pub Date : 2021-01-20 Chunhui Zhao; Yinhua Tang; Junli Wang; Yanhong Zeng; Hequan Sun; Zichao Zheng; Rong Su; Korbinian Schneeberger; Jane E. Parker; Haitao Cui
Calcium (Ca2+) is a second messenger for plant cell surface and intracellular receptors mediating pattern‐triggered and effector‐triggered immunity (respectively, PTI and ETI). Several CYCLIC NUCLEOTIDE‐GATED CHANNELS (CNGCs) were shown to control transient cytosolic Ca2+ influx upon PTI activation. The contributions of specific CNGC members to PTI and ETI remain unclear. ENHANCED DISEASE SUSCEPTIBLITY1
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LF1 regulates the lateral organs polarity development in rice New Phytol. (IF 8.512) Pub Date : 2021-01-20 Ting Zhang; Jing You; Yi Zhang; Wanyue Yao; Wenbo Chen; Qiannan Duan; Wenwen Xiao; Li Ye; Yue Zhou; Xianchun Sang; Yinghua Ling; Guanghua He; Yunfeng Li
The patterning of adaxial–abaxial tissues plays a vital role in the morphology of lateral organs, which is maintained by antagonism between the genes that specify adaxial and abaxial tissue identity. The homeo‐domain leucine zipper class III (HD‐ZIP III) family genes regulate adaxial identity; however, little is known about the physical interactions or transcriptionally regulated downstream genes of
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NIN is essential for development of symbiosomes, suppression of defence and premature senescence in Medicago truncatula nodules New Phytol. (IF 8.512) Pub Date : 2021-01-20 Jieyu Liu; Menno Rasing; Tian Zeng; Joël Klein; Olga Kulikova; Ton Bisseling
NIN (NODULE INCEPTION) is a transcription factor that plays a key role during root nodule initiation. However, it’s role in later nodule developmental stages is unclear. Both NIN mRNA and protein accumulated at the highest level in the proximal part of the infection zone in Medicago truncatula nodules. Two nin weak allele mutants, nin‐13/16, form a rather normal nodule infection zone, whereas a fixation
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The miR172/IDS1 signaling module confers salt tolerance through maintaining ROS homeostasis in cereal crops New Phytol. (IF 8.512) Pub Date : 2021-01-19 Xiliu Cheng; Qiang He; Sha Tang; Haoran Wang; Xiangxiang Zhang; Mingjie Lv; Huafeng Liu; Qian Gao; Yue Zhou; Qi Wang; Xinyu Man; Jun Liu; Rongfeng Huang; Huan Wang; Tao Chen; Jie Liu
Salt stress triggers the overdose accumulation of reactive oxygen species (ROS) in crop plants, leading to severe oxidative damage to living tissues. MicroRNAs act as master regulators orchestrating the stress responsive regulatory networks as well as salt tolerance. However, the fundamental roles of miRNAs in modulating salt tolerance in cereal crops, especially in salt‐triggered ROS scavenging remain
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Modulation of Arabidopsis root growth by specialized triterpenes New Phytol. (IF 8.512) Pub Date : 2020-12-07 Yuechen Bai; Patricia Fernández‐Calvo; Andrés Ritter; Ancheng C. Huang; Stefania Morales‐Herrera; Keylla U. Bicalho; Michal Karady; Laurens Pauwels; Dieter Buyst; Maria Njo; Karen Ljung; José C. Martins; Steffen Vanneste; Tom Beeckman; Anne Osbourn; Alain Goossens; Jacob Pollier
Plant roots are specialized belowground organs that spatiotemporally shape their development in function of varying soil conditions. This root plasticity relies on intricate molecular networks driven by phytohormones, such as auxin and jasmonate (JA). Loss‐of‐function of the NOVEL INTERACTOR OF JAZ (NINJA), a core component of the JA signaling pathway, leads to enhanced triterpene biosynthesis, in
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Mast seeding: the devil (and the delight) is in the detail New Phytol. (IF 8.512) Pub Date : 2020-12-09 Dave Kelly
This article is a Commentary on Bogdziewicz et al. (2021), 229: 2357–2364.
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Jeannine Cavender‐Bares New Phytol. (IF 8.512) Pub Date : 2021-01-19
What inspired your interest in plant science? It was a windy road for me. The short answer is my Dad. I grew up in Athens, Ohio (USA), which is nestled in the foothills of the Appalachian Mountains. Throughout my young life I was surrounded by nature. My father was a mycologist in the Botany Department at Ohio University (now Emeritus); he taught courses on fungi, medicinal plants, the role of plants
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Plant tropisms as a window on plant computational processes New Phytol. (IF 8.512) Pub Date : 2020-11-20 Yasmine Meroz
Plants are living information‐processing organisms with highly adaptive behavior, allowing them to prosper in a harsh and fluctuating environment in spite of being sessile. Lacking a central nervous system, plants are distributed systems orchestrating complex computational processes performed at the tissue level. Here I consider plant tropisms as a useful input–output system boasting a robust mathematical
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The goo‐d stuff: Plantago as a myxospermous model with modern utility New Phytol. (IF 8.512) Pub Date : 2020-11-21 James M. Cowley; Rachel A. Burton
Mucilage, a gel‐like layer formed around wetted seeds in a process called myxospermy, has importance as a proxy for studying cell wall polysaccharide biosynthesis and interactions and as a source of valuable health supplements and hydrocolloids. Arabidopsis thaliana has provided unrivalled insight into mucilage/cell wall synthesis, but its lack of commercial utility presents an opportunity to develop
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Coumarin accumulation and trafficking in Arabidopsis thaliana: a complex and dynamic process New Phytol. (IF 8.512) Pub Date : 2020-11-18 Kevin Robe; Geneviève Conejero; Fei Gao; Linnka Lefebvre‐Legendre; Elodie Sylvestre‐Gonon; Valérie Rofidal; Sonia Hem; Nicolas Rouhier; Marie Barberon; Arnaud Hecker; Frédéric Gaymard; Esther Izquierdo; Christian Dubos
Iron (Fe) is a major micronutrient and is required for plant growth and development. Nongrass species have evolved a reduction‐based strategy to solubilize and take up Fe. The secretion of Fe‐mobilizing coumarins (e.g. fraxetin, esculetin and sideretin) by plant roots plays an important role in this process. Although the biochemical mechanisms leading to their biosynthesis have been well described
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A (conditional) role for labdane‐related diterpenoid natural products in rice stomatal closure New Phytol. (IF 8.512) Pub Date : 2021-01-18 Juan Zhang; Riqing Li; Meimei Xu; Rachel I. Hoffmann; Yushi Zhang; Bo Liu; Mingcai Zhang; Bing Yang; Zhaohu Li; Reuben J. Peters
• Rice (Oryza sativa) is the staple food for over half the world’s population. Drought stress imposes major constraints on rice yields. Intriguingly, labdane‐related diterpenoid (LRD) phytoalexins in maize (Zea mays) affect drought tolerance, as indicated by the increased susceptibility of an insertion mutant of the class II diterpene cyclase ZmCPS2/An2 that initiates such biosynthesis. Rice also produces
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The geometry of the compound leaf plays a significant role in the leaf movement of Medicago truncatula modulated by mtdwarf4a New Phytol. (IF 8.512) Pub Date : 2021-01-18 Weiyue Zhao; Quanzi Bai; Baolin Zhao; Qing Wu; Chaoquan Wang; Ye Liu; Tianquan Yang; Yu Liu; Hua He; Shanshan Du; Million Tadege; Liangliang He; Jianghua Chen
In most legumes, two typical features found in leaves are diverse compound forms and the pulvinus‐driven nyctinastic movement. Many genes have been identified for leaf‐shape determination, but the underlying nature of leaf movement as well as its association with the compound form remains largely unknown. Using forward‐genetic screening and whole‐genome resequencing, we found that two allelic mutants
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A novel pathogenicity determinant hijacks maize catalase 1 to enhance viral multiplication and infection New Phytol. (IF 8.512) Pub Date : 2021-01-18 Zhiyuan Jiao; Yiying Tian; Yanyong Cao; Juan Wang; Binhui Zhan; Zhenxing Zhao; Biao Sun; Chang Guo; Wendi Ma; Zhenfeng Liao; Hengmu Zhang; Tao Zhou; Yiji Xia; Zaifeng Fan
Pathogens have evolved various strategies to overcome host immunity for successful infection. Maize chlorotic mottle virus (MCMV) can cause lethal necrosis in maize (Zea mays) when it coinfects with a virus in the Potyviridae family. However, MCMV pathogenicity determinant remains largely unknown. Here we show that the P31 protein of MCMV is important for viral accumulation and essential for symptom
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Moss stomata do not respond to light and CO2 concentration but facilitate carbon uptake by sporophytes: a gas exchange, stomatal aperture and 13C labelling study New Phytol. (IF 8.512) Pub Date : 2021-01-18 Jiří Kubásek; Tomáš Hájek; Jeffrey Duckett; Silvia Pressel; Jiří Šantrůček
•Stomata exert control on fluxes of CO2 and H2O in the majority of vascular plants and thus are pivotal for planetary fluxes of carbon and water. However, in mosses, the significance and possible function of the sporophytic stomata are not well understood, hindering understanding of the ancestral function and evolution of these key structures of land plants.
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Silencing the alarm: an insect salivary enzyme closes plant stomata and inhibits volatile release New Phytol. (IF 8.512) Pub Date : 2021-01-18 Po‐An Lin; Yintong Chen; Duverney Chaverra‐Rodriguez; Chan Chin Heu; Nursyafiqi Bin Zainuddin; Jagdeep Singh Sidhu; Michelle Peiffer; Ching‐Wen Tan; Anjel Helms; Donghun Kim; Jared Ali; Jason L. Rasgon; Jonathan Lynch; Charles T. Anderson; Gary W. Felton
Herbivore‐induced plant volatiles (HIPVs) are widely recognized as an ecologically important defensive response of plants against herbivory. Although the induction of this “cry for help” has been well‐documented, only a few studies has investigated the inhibition of HIPVs by herbivores, and little is known about whether herbivores have evolved mechanisms to inhibit the release of HIPVs. To examine
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Diversification, disparification, and hybridization in the desert shrubs Encelia New Phytol. (IF 8.512) Pub Date : 2021-01-18 Sonal Singhal; Adam B. Roddy; Christopher DiVittorio; Ary Sanchez‐Amaya; Claudia L. Henriquez; Craig R. Brodersen; Shannon Fehlberg; Felipe Zapata
There are multiple hypotheses for the spectacular plant diversity found in deserts. We explore how different factors, including the roles of ecological opportunity and selection, promote diversification and disparification in Encelia, a lineage of woody plants in the deserts of the Americas. Using a nearly complete species‐level ddRAD‐based phylogeny along with a broad set of phenotypic traits, we
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In vivo assembly of the sorgoleone biosynthetic pathway and its impact on agroinfiltrated leaves of Nicotiana benthamiana New Phytol. (IF 8.512) Pub Date : 2021-01-18 Zhiqiang Pan; Joanna Bajsa‐Hirschel; Justin N. Vaughn; Agnes M. Rimando; Scott R. Baerson; Stephen O. Duke
Sorgoleone, a hydrophobic compound exuded from root hair cells of Sorghum spp., accounts for much of the allelopathic activity of the genus. The enzymes involved in the biosynthesis of this compound have been identified and functionally characterized. Here, we report the successful assembly of the biosynthetic pathway and the significant impact of in vivo synthesized sorgoleone on the heterologous
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Auxin efflux controls orderly nucellar degeneration and expansion of the female gametophyte in Arabidopsis New Phytol. (IF 8.512) Pub Date : 2020-12-18 Junzhe Wang; Xiaolong Guo; Qiang Xiao; Jianchu Zhu; Alice Y. Cheung; Li Yuan; Elizabeth Vierling; Shengbao Xu
The nucellus tissue in flowering plants provides nutrition for the development of the female gametophyte (FG) and young embryo. The nucellus degenerates as the FG develops, but the mechanism controlling the coupled process of nucellar degeneration and FG expansion remains largely unknown. The degeneration process of the nucellus and spatiotemporal auxin distribution in the developing ovule before fertilization
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Protein glycosylation during infection by plant pathogenic fungi New Phytol. (IF 8.512) Pub Date : 2021-01-17 Caiyun Liu; Nicholas J. Talbot; Xiao‐Lin Chen
Glycosylation is a conserved set of post‐translational modifications that exists in all eukaryotic cells. During the last decade, the role of glycosylation in plant pathogenic fungi has received significant attention and considerable progress has been made, especially in Ustilago maydis and Magnaporthe oryzae. Here, we review recent advances in our understanding of the role of N‐glycosylation, O‐glycosylation
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Rapid evolution of latitudinal clines in growth and defense of an invasive weed New Phytol. (IF 8.512) Pub Date : 2021-01-17 Yang Yang; Mu Liu; Yuanfei Pan; Heyan Huang; Xiaoyun Pan; Alejandro Sosa; Yuping Hou; Zhengcai Zhu; Bo Li
Re‐establishment of heritable latitudinal clines in growth‐related traits has been recognized as evidence for adaptive evolution in invasive plants. However, less is known about latitudinal clines in defense and joint clinal evolution of growth and defense in invasive plants. We planted 14 native Argentinean populations and 14 introduced Chinese populations of Alternanthera philoxeroides in replicate
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Global patterns and a latitudinal gradient of flower disparity: perspectives from the angiosperm order Ericales New Phytol. (IF 8.512) Pub Date : 2021-01-17 Marion Chartier; Maria Von Balthazar; Susanne Sontag; Stefan Löfstrand; Thomas Palme; Florian Jabbour; Hervé Sauquet; Jürg Schönenberger
Morphological diversity (disparity) is an essential but often neglected aspect of biodiversity. Hence, it seems timely and promising to re‐emphasize morphology in modern evolutionary studies. Disparity is a good proxy for the diversity of functions and interactions with the environment of a group of taxa. In addition, geographical and ecological patterns of disparity are crucial to understand organismal
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Golgi‐localized manganese transporter PML3 regulates Arabidopsis growth through modulating Golgi glycosylation and cell wall biosynthesis New Phytol. (IF 8.512) Pub Date : 2021-01-17 Chang‐Hong Yang; Chao Wang; Somesh Singh; Ni Fan; Shuo Liu; Li Zhao; Hengliang Cao; Wenxiang Xie; Chengwei Yang; Chao‐Feng Huang
Golgi is a critical compartment for both the reutilization of the essential micronutrient manganese (Mn) and its detoxification. However, whether Mn plays a role in the Golgi remains to be demonstrated in plants. We characterized the function of PML3, a member of the Unknown Protein Family UPF0016, in Mn transport and the regulation of plant growth, Golgi glycosylation and cell wall biosynthesis in
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Optimal carbon partitioning helps reconcile the apparent divergence between optimal and observed canopy profiles of photosynthetic capacity New Phytol. (IF 8.512) Pub Date : 2021-01-17 Thomas N. Buckley
Photosynthetic capacity per unit irradiance is greater, and the marginal carbon revenue of water (∂A/∂E) is smaller, in shaded leaves than sunlit leaves, apparently contradicting optimization theory. I tested the hypothesis that these patterns arise from optimal carbon partitioning subject to biophysical constraints on leaf water potential. In a whole plant model with two canopy modules, I adjusted
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ERECTA signaling regulates plant immune responses via chromatin‐mediated promotion of WRKY33 binding to target genes New Phytol. (IF 8.512) Pub Date : 2021-01-17 Hanyang Cai; Youmei Huang; Fangqian Chen; Liping Liu; Mengnan Chai; Man Zhang; Maokai Yan; Mohammad Aslam; Qing He; Yuan Qin
• The signaling pathway mediated by the receptor‐like kinase ERECTA (ER) plays important roles in plant immune responses, but the underlying mechanism is unclear.
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Ancient and recent gene duplications as evolutionary drivers of the seed maturation regulators DELAY OF GERMINATION1 family genes New Phytol. (IF 8.512) Pub Date : 2021-01-17 Eri Nishiyama; Mariko Nonogaki; Satoru Yamazaki; Hiroyuki Nonogaki; Kazuhiko Ohshima
The DELAY OF GERMINATION1 (DOG1) family genes (DFGs) in Arabidopsis thaliana are involved in seed dormancy, reserve accumulation, and desiccation tolerance. Decoding the molecular evolution of DFGs is key to understanding how these seed programs evolved. This article demonstrates that DFGs have diverged in the four lineages DOG1, DOG1‐LIKE4 (DOGL4), DOGL5, and DOGL6 while DOGL1, DOGL2, and DOGL3 arose
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Adaptive introgression: how polyploidy reshapes gene flow landscapes New Phytol. (IF 8.512) Pub Date : 2021-01-17 Roswitha Schmickl; Levi Yant
Rare, yet accumulating evidence in both plants and animals shows that whole genome duplication (WGD, leading to polyploidy) can break down reproductive barriers, facilitating gene flow between otherwise isolated species. Recent population genomic studies in wild, outcrossing Arabidopsis arenosa and Arabidopsis lyrata indicate that this WGD‐potentiated gene flow can be adaptive and highly specific in
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An optimized genetically encoded dual reporter for simultaneous ratio imaging of Ca2+‐ and H+ reveals new insights into ion signaling in plants New Phytol. (IF 8.512) Pub Date : 2021-01-17 Kunkun Li; Juan Prada; Daniel S.C. Damineli; Anja Liese; Tina Romeis; Thomas Dandekar; José A. Feijó; Rainer Hedrich; Kai Robert Konrad
Whereas the role of calcium ions (Ca2+) in plant signaling is well studied, the physiological significance of pH‐changes remains largely undefined. Here we developed CapHensor, an optimized dual‐reporter for simultaneous Ca2+ and pH ratio‐imaging and studied signaling events in pollen tubes (PTs), guard cells (GCs), and mesophyll cells (MCs). Monitoring spatio‐temporal relationships between membrane
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The Arabidopsis R‐SNARE VAMP714 is essential for polarization of PIN proteins and auxin responses New Phytol. (IF 8.512) Pub Date : 2021-01-17 Xiaoyan Gu; Kumari Fonseka; Julien Agneessens; Stuart A. Casson; Andrei Smertenko; Guangqin Guo; Jennifer F. Topping; Patrick J. Hussey; Keith Lindsey
The plant hormone auxin and its directional intercellular transport plays a major role in diverse aspects of plant growth and development. The establishment of auxin gradients requires the asymmetric distribution of members of the auxin efflux carrier PIN‐FORMED (PIN) protein family to the plasma membrane. An endocytic pathway regulates the recycling of PIN proteins between the plasma membrane and
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Perception of the pathogen‐induced peptide RGF7 by the receptor‐like kinases RGI4 and RGI5 triggers innate immunity in Arabidopsis thaliana New Phytol. (IF 8.512) Pub Date : 2021-01-17 Xiaoyang Wang; Na Zhang; Lina Zhang; Yunxia He; Chao Cai; Jinggeng Zhou; Jia Li; Xiangzong Meng
Signaling peptides play crucial roles in plant growth, development and defense. We report here that the Arabidopsis thaliana secreted peptide, ROOT MERISTEM GROWTH FACTOR 7 (RGF7), functions as an endogenous elicitor to trigger plant immunity. Expression of the RGF7 precursor‐encoding gene (preRGF7) is highly induced in Arabidopsis leaves upon infection by the bacterial pathogen Pseudomonas syringae
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Shedding light on the dark side of xanthophyll cycles New Phytol. (IF 8.512) Pub Date : 2021-01-16 Beatriz Fernández‐Marín; Thomas Roach; Amy Verhoeven; José Ignacio García‐Plazaola
Xanthophyll cycles are broadly important in photoprotection, and the reversible de‐epoxidation of xanthophylls typically occurs in excess light conditions. However, as presented in this review, compiling evidence in a wide range of photosynthetic eukaryotes shows that xanthophyll de‐epoxidation also occurs under diverse abiotic stress conditions in darkness. Light‐driven photochemistry usually leads
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Plastidial retrograde modulation of light and hormonal signaling: an odyssey New Phytol. (IF 8.512) Pub Date : 2021-01-16 Jishan Jiang; Katayoon Dehesh
The transition from an engulfed autonomous unicellular photosynthetic bacterium to a semi‐autonomous endosymbiont plastid was accompanied by the transfer of genetic material from the endosymbiont to the nuclear genome of the host, ensued by the establishment of plastids‐to‐nucleus (retrograde) signaling. The retrograde coordinated activities of the two subcellular genomes ensures chloroplast biogenesis
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Genes derived from ancient polyploidy have higher genetic diversity and are associated with domestication in Brassica rapa New Phytol. (IF 8.512) Pub Date : 2021-01-16 Xinshuai Qi; Hong An; Tara E. Hall; Chenlu Di; Paul D. Blischak; Michael T.W. McKibben; Yue Hao; Gavin C. Conant; J. Chris Pires; Michael S. Barker
● Many crops are polyploid or have a polyploid ancestry. Recent phylogenetic analyses have found that polyploidy often preceded the domestication of crop plants. One explanation for this observation is that increased genetic diversity following polyploidy may have been important during the strong artificial selection that occurs during domestication. ● To test the connection between domestication and
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Coordination of stem and leaf traits define different strategies to regulate water loss and tolerance ranges to aridity New Phytol. (IF 8.512) Pub Date : 2021-01-16 Rosana López; Francisco Javier Cano; Nicolas K Martin‐StPaul; Hervé Cochard; Brendan Choat
▪ Adaptation to drought involves complex interactions of traits that vary within and among species. To date, few data are available to quantify within‐species variation in functional traits and they are rarely integrated into mechanistic models to improve predictions of species response to climate change. ▪ We quantified intraspecific variation in functional traits of two Hakea species growing along
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Genome‐Wide Discovery of Natural Variation in Pre‐mRNA Splicing and Prioritizing Causal Alternative Splicing to Salt Stress Response in Rice New Phytol. (IF 8.512) Pub Date : 2021-01-16 Huihui Yu; Qian Du; Malachy Campbell; Bin Yu; Harkamal Walia; Chi Zhang
Pre‐mRNA splicing is an essential step for the regulation of gene expression. In order to specifically capture splicing variants in plants for genome‐wide association studies (GWAS), we developed a software tool to quantify and visualize Variations of Splicing in Population (VaSP). VaSP can quantify splicing variants from short‐read RNA‐seq datasets and discover genotype‐specific splicing (GSS) events
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Leaf turgor loss point shapes local and regional distributions of evergreen but not deciduous tropical trees New Phytol. (IF 8.512) Pub Date : 2021-01-15 Norbert Kunert; Joseph Zailaa; Valentine Herrmann; Helene C. Muller‐Landau; S. Joseph Wright; Rolando Pérez; Sean M. McMahon; Richard C. Condit; Steven P. Hubbell; Lawren Sack; Stuart J. Davies; Kristina J. Anderson‐Teixeira
● The effects of climate change on tropical forests will depend on how diverse tropical tree species respond to drought. Current distributions of evergreen and deciduous tree species across local and regional moisture gradients reflect their ability to tolerate drought stress, and might be explained by functional traits. ● We measured leaf water potential at turgor loss (i.e., “wilting point”; πtlp)
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The maximum growth rate hypothesis is correct for eukaryotic photosynthetic organisms, but not cyanobacteria New Phytol. (IF 8.512) Pub Date : 2021-01-15 T.A.V. Rees; John A. Raven
The (maximum) growth rate (µmax) hypothesis predicts that cellular and tissue phosphorus levels should increase with increasing growth rate, and RNA should also increase as most of the phosphorus is required to make ribosomes. Using published data, we show that though there is a strong positive relationship between the µmax of all photosynthetic organisms and their phosphorus content (% dry weight)