Salt stress affects plant growth and crop yield reduction, thus how to improve the salt tolerance of plants is full of challenges. Plant growth-promoting rhizobacteria (PGPR), as an environment-friendly treatment to improve salt stress tolerance of plants is widely accepted and has big potential in field application. In this study, a halotolerant actinomycete Streptomyces sp. KLBMP5084 obtained from

Quorum sensing (QS) is a well-known, cell density dependent regulatory process in bacterial communities. It is mediated by auto-induced synthesis of diffusible signal molecules once a critical cell density is reached. In Gram-negative bacteria, N-acyl-homoserine lactones (AHLs) are QS-signal molecules involved in, for e.g. biofilm formation, activation of virulence genes of pathogens, and induction

Plant roots modify aggregation of rhizosphere soil. Oxisols, in turn, have very small, granular, stable and resistant aggregates. So, it is necessary a sensitive method to detect differences between rhizosphere soil and non-rhizosphere soil or bulk soil. The objective of this work was to evaluate aggregation of rhizosphere soil and bulk soil under six cropping systems by turbidimetry and water percolation

In the last decades, the applications of Plant Growth Promoting Rhizobacteria (PGPR) as inoculants for enhancing crops yield under different stress conditions have reached enormous interest. Pseudomonas putida KT2440 is a well-known rhizobacteria capable of colonizing roots of agronomically important crops. This work aims to evaluate three P. putida KT2440 mutants (mus-20, mus-42, and EU206), which

Biochar (B) and fertilizer (organic fertilizer, OF and synthetic fertilizer, CF) are frequently applied to improve ecosystem function and increase crop productivity in degraded soil. Nonetheless, the effects and mechanism of biochar in combination with OF and CF on degraded red soil was unclear. The aim was to study the influence of biochar and fertilizer related amendments in a degraded red soil on

Soil use and management modify mycorrhizal interactions, but how these changes affect the growth and nutrition of crops under different contexts has been poorly studied. The objective of this study was to evaluate the effects of arbuscular mycorrhizal fungal (AMF) spore communities belonging to two no-till cropping systems (soybean monoculture and soybean-maize rotation), and uncultivated grasslands

We compared putrescine metabolism in roots of tolerant maize cultivar (Karoon) to a susceptible cultivar (260) under drought stress. The experiment was conducted in growth chamber under controlled condition in 80 pots. Drought stress led to significant increase in root growth indices, H2O2 content and activity of antioxidant enzymes (superoxide dismutase, catalase, and peroxidase). The qPCR analysis

Biotic and abiotic constraints jeopardize the expansion of common bean (Phaseolus vulgaris L.) cultivation to the Cameroon warmer lowlands. The crop is traditionally perceived as a cooler region crop unsuited for the humid tropical areas. We surveyed 78 farmer's fields during the 2015 and 2016 growing seasons, across 7 sub-divisions in the lowland agro-ecological zone of the Centre Region of Cameroon

In this study, we developed two depth-decaying and depth-cumulative models of root length density and root mass density of winter barley and compared them with the several existing depth-decaying and depth-cumulative root distribution models. The experimental treatments were the combinations of full, deficit, and rainfed irrigations under the raised bed and conventional flat planting systems. The two

Typha domingensis is an invasive macrophyte which can be found even under low water levels. The objective of this study was to evaluate the root growth and anatomy as related to nutrient uptake and distribution of cattail under different water availabilities. Typha domingensis individuals were subjected to five water conditions: waterlogged, field capacity (FC), 75%FC and 50%FC. Nutrient contents of

The plant root system influences plant growth and development due to its phenotypic, physiological, metabolomic, and microbiomic traits. Broadly speaking, it is characterized by primary (stem-attached large), secondary (primary-attached medium), and fine (secondary-attached hair-like) roots. The role of root branching order and categories (fine, medium, and large) in influencing microbial communities

This study is aimed to investigate the antifungal activity of endophytic fungi isolated from Jerusalem artichoke (Helianthus tuberosus) and Ginger (Zingiber officinale) and Stemona root (Stemona tuberosa) against causative agent of southern stem rot Sclerotium rolfsii. The dual assay results showed that out of 110 fungal endophytes, Diaporthe phaseolorum BUP3/1 and Macrophomina phaseolina BUP2/3, isolated

Cover crops may influence soil health and functioning. However, little is known about the role of belowground root architectural traits in linking cover crop diversity with rhizosphere soil ecosystem properties. We hypothesize that cover crop diversity may improve root traits, which in return, could influence its effects on essential indicators of soil physicochemical heterogeneity, such as the composition

Herein we report a study examining the effects of colletotrichumine A, an indole-pyrazine alkaloid isolated from the anthracnose pathogen Colletotrichum capsici, on chilli plants. A colletotrichumine A-pathogen combination was more toxic to the host than individual inoculations of colletotrichumine A or the pathogen. The colletotrichumine A-pathogen combination led to an increased activity of defense

A plant microbiome includes a community of microrganisms that interact extensively with the plant. The bacteria Azospirillum brasilense and Herbaspirillum seropedicae are nitrogen fixers and plant growth promoters, capable of promoting associations with the wheat crop, being a biological tool to reduce chemical fertilizers. Thus, the present work aims to evaluate the interaction of these bacteria with

The context-dependent nature of plant-microbe interaction in the rhizosphere is of significance in terms of the consistency of beneficial microbe effects in inoculated plants. We performed a series of experiments testing the effect of inoculation with arbuscular mycorrhizal fungi (AMF) and a root-associated fungus, Penicillium pinophilum EU0013, on the growth and root colonization of tomato and lettuce

There is considerable evidence that abiotic factors have an important influence on the microbial diversity of natural ecosystems. In the present study, we tested the hypothesis that rhizospheric and endophytic micro-organisms isolated from the roots of Hymenaea courbaril L. in two biomes with distinct ecological characteristics – the Pantanal wetland and the Cerrado savanna – present distinct functional

Soil communities support great biodiversity, as well as their interaction with the plants, can be equally diverse. In this work, we focused our attention on investigating the effect of native rhizobia from Brazilian grassland as a plant growth-promoting rhizobacteria for grasses. We suggest that the positive effect of rhizobacteria on plants is context-dependent, and native species may present better

Plant parasitic nematodes (PPNs) cause huge agricultural and silvicultural losses every year. Most studies that investigated various mechanisms for killing nematodes used the model organism Caenorhabditis elegans. Pseudomonas chlororaphis is an important biocontrol bacterium with great application potential in agriculture. Pseudomonas chlororaphis strains have the potential to control PPNs. In our

The Baja California desert harsher environment harbors a limited biodiversity due to extreme conditions like low moisture of sandy soils and high soil temperature. In the present study, actinobacteria from soil of Baja California desert was isolated and their properties as plant growth promoter and antifungal activity were evaluated. Streptomyces netropsis strain A-ICA was isolated and identified based

Plant competitive superiority has long been hypothesized to play a key role in the process of plant invasion, which is also affected by global change components such as anthropogenic nitrogen (N) deposition. To explore mutual interactions between alien and native plants at different N available levels, a pot experiment was carried out at a common garden in northern China. Two alien plants (Lolium perenne

Mycorrhiza fungi can use as an efficient resource to increase the efficiency of potato nutrients use, especially phosphorus (P) and nitrogen (N) to achieve sustainable production and protecting the environment and human health. This experiment conducted to study the interaction of P levels and mycorrhiza fungi on absorption of elements and qualitative and quantitative yields of potato under field conditions

The present study was conducted to examine the accumulation of nutrients, antioxidant enzymes activity, growth and yield of pea influenced by arbuscular mycorrhizal fungi (AMF) under salt stress. This study included four treatments i.e. single species AMF (Rhizophagus intraradices), formulated AMF (Funneliformis mosseae and Rhizophagus intraradices), and multi species AMF (Rhizophagus fasciculatus

Multifunctional microorganisms, showing multiple mechanisms of plant growth promotion, are desirable in the development of microbial formulations. Aspergillus niger is known for its capacity to solubilize mineral phosphates, being considered a promising candidate for the development of inoculants. Furthermore, A. niger can produce phytohormones, which places it as a potential multifunctional plant-growth

Juçara palm (Euterpe edulis Mart.) is a native species of great ecological and economic importance that occurs in the Brazilian Atlantic Forest. The illegal harvesting of wild juçara palm heart has brought the species onto the endangered species list. Thus, this study aims to isolate, characterize, and select native bacterial strains associated with E. edulis and estimate the correlation between soil

Although sold commercially as myco-insecticides, naturally occurring soil borne entomopathogenic fungi (EPF) pose a unique opportunity for regulating soil-dwelling insect herbivore populations via conservation biological control. Plant identity has a significant effect on soil borne fungi, which may includee EPF. We asked whether the choice of covercrops could affect the diversity and infectivity of

Rhizobia can colonize the roots of grasses in the Brazilian semiarid region; however, studies to isolate these bacteria for growth promotion of maize via unconventional isolation approaches have not been conducted. This study aimed to isolate, characterize (biochemically and molecularly) and assess the potential of cowpea nodulating/maize associated rhizobia for plant growth promotion. Extracts of

Phytonematodes cause great losses to agricultural production. The magnitude of their economic impact is directly related to management practices, with the hypothesis that high nematode populations can also be found inside and outside symptomatic patches, and that they correlate with soil properties. This study examined the relationship of soil chemical properties and texture with phytonematode populations

Salinity stress adversely affects root nodulation symbiotic relationships, and ultimately the nitrogen fixation capacity and the growth and yield of leguminous plants. Improving growth and biological nitrogen fixation of leguminous plants grown on salt–affected soils are considered to be a striking challenge. Most of the findings reveal that co–inoculation of legumes with salt–tolerant non–rhizobial

In tree-based intercropping systems, roots of trees and crops are interacting and could influence ecosystem services provided by soil microorganisms. Here, the analysis of diversity of arbuscular mycorrhiza fungi (AMF) associated with roots of walnut and maize reveals differences. Of interest, Funneliformis genus is mainly associated with maize roots, and one OTU related to an uncultured Glomus, might

Endophytic plant growth promoting bacteria are of great interest since the ability to colonize the internal tissues of plants gives it an adaptive advantage. To confer any beneficial effect on the plant, bacteria must present a successful colonization and thus be competent in the rhizosphere and finally infect internal tissues. In this sense, bacterial motility is an essential property involved in

Plants from phosphorus (P) limited environments have developed various strategies for acquiring P from the soil, and for maintaining P homeostasis within the plant. We analyzed the mechanisms of phosphorus acquisition used by the grass Sporobolus airoides-rhizosphere microbiota during two years with contrasting annual rainfall in an extreme P-oligotrophic ecosystem. We determined arbuscular mycorrhizal

Cyanobacteria, a group of N2 fixing bacteria, and some species of them are free-living or associated with other bacteria, such as Azospirillum. Their association promotes the growth and productive performance of maize (Zea mays), showing variable responses according to the maize hybrid used. Thus, the aim of this study was to evaluate the effects of inoculation and co-inoculation of the Anabaena cylindrica

The utilization of appropriate preparations of plant growth-promoting fungi (PGPF) is one of the most promising trends for inducing plant resistance against a pathogen. However, not much is known about their mechanisms. Herein, the goal of this study was to present more information on this matter. The isolated rhizosphere fungi Aspergillus falvus, Aspergillus niger, Penicillium citrinum, Penicillium

The root knot nematode (Meloidogyne spp.) is a widely distributed phytoparasite and causes production losses in soybeans. Therefore, the aim of the present study was to evaluate the isolates of Purpureocillium lilacinum (Simbiose®), Claroideoglomus etunicatum and Rhizophagus clarus as possible biocontrol agents for Meloidogyne incognita. The greenhouse treatments consisted of six distinct formulations

Iron biofortification of crops, like wheat, is an attractive strategy to cope with iron deficiency causing hidden hunger. Several recent studies dissected the genetics controlling iron concentrations in wheat grain, and expanded our understanding of iron accumulation in wheat grains. However, successful breeding of iron-rich wheat cultivar is limited based on plant genetics. Along with the wide appreciation

White root rot disease caused by Rigidoporus microporus results in major economic loss to rubber plantation in all rubber growing countries including Malaysia. This glasshouse trial was conducted to explore the potential of single and co-inoculation of Enterobacter sp. UPMSSB7 and arbuscular mycorrhizal fungi (Glomus mosseae) with silicon for white root rot disease suppression and plant growth promotion

Flavonoids produced by roots are secondary metabolites involved in the induction of nod genes in rhizobial cells and nodule organogenesis. We describe the development and quality control of a new formulation for soybean (Glycine max (L.) Merr.) based on Bradyrhizobium elkanii cells grown in a culture medium containing isoflavones. As opposed to B. japonicum, the performance of B. elkanii pre-incubated

Arbuscular mycorrhizal fungi (AMF) play a pivotal role in ecological restoration. To date, indigenous AMF remain unexplored but could be a potential resource for successful restoration programs. In this study, we evaluated the infectivity of AMF of five degraded oasis soils in Morocco (Marrakesh, Tafilalet, Draa, Tata-Guelmim and Figuig). Our data showed that mycorrhizal parameters; AMF spore number

The coarse mint (Plectranthus amboinicus Lour.) is a medicinal plant that produces essential oil; however, it is still little studied the effects of effects of arbuscular mycorrhizal fungi species on growth and essential oil content and its composition in P. amboinicus. Therefore, this study aimed to evaluate Rhizophagus clarus and Claroideoglomus etunicatum under low and high phosphorus conditions

This study aimed to evaluate the influence of arbuscular mycorrhizal fungi on the growth and production of capitula and essential oil of chamomile plants, under different growth conditions. The symbiosis between fungi of the phylum Glomeromycota and plant roots may cause changes in secondary metabolism, including the synthesis of essential oils. Increasing biomass production associated with gains in

The efficacy of a liquid formulation of “PGPR mix-I″ amended with 15 mM treahoalose, and a talc based formulation of the same were tested for plant growth promotion in amaranthus crop in sterilized soil under glass house conditions. The seven treatments included 100% NPK as per Kerala Agricultural University recommendation as chemical fertilizer alone, talc based or liquid formulation of PGPR mix–I

The viability of the Golden Pothos (Epipremnum aureum) plants in different formulations of engineered growth media were evaluated for application in plant-based air filtration systems. To enhance filtration capability, the growth media was engineered to improve toxin capture ability with the aim of maintaining a plant-friendly environment. The growth media used in this study was a hydroponic media

This study aimed to characterize endophytic bacteria associated with root-nodules of a wild legume (Genista cinerea: Fabaceae) growing in arid soils of Algeria. A total of ten non-symbiotic endophytic bacterial strains were isolated and identified using a combination of conventional and molecular approaches based on 16S rRNA gene sequencing. Moreover, growth variations of the isolates under different

Research on arbuscular mycorrhizal fungi (AMF) in ultramafic soils has principally focused on ecological restoration whereas little attention has been given to agriculture. The present study aims at understanding if mixtures of different AMF species from a New Caledonian ultramafic soil induced a better plant fitness and lower contents of potentially toxic metals in aerial parts of a crop plant than

Bacteria of the Pseudomonas genus have been widely studied due to their antagonistic potential against a diverse group of fungal and bacterial phytopathogens, and their competence to colonize different plant tissues. We have isolated a rhizospheric pseudomonad that produced a black pigment, which is not a widespread trait within this genus. We confirmed that the isolate belonged to the P. putida complex

Exopolysaccharides (EPS) the high molecular weight microbial substances play an important role in enhancing soil aggregation as well as maintaining water holding capacity around the rhizosphere. Therefore, looking into the fact that rice is one of the important food crops for most of the people of the world and the ability of EPS to increase the uptake of nutrients by plants and protect from drought

Evaluation of the potential mechanisms that link arbuscular mycorrhizal fungi (AMF) and green algae to carbon mineralization is highly fundamental under saline arid land since a deep vision into these interrelationships might lead to improvements in soil quality, carbon protection and the implication for a better ecosystem functioning. This study aimed to determine the interactions between arbuscular

Activated carbon (AC) is a known adsorbent for organic compounds including root exudates but could have an influence on crop yield and greenhouse gas (GHG) emissions. A 2-year pot experiment was conducted to assess the effect of AC on GHG emissions, seed yield, soil chemical properties and isoflavone content of soybean genotypes with varying nodulation capacities under sandy soil conditions. We also

Phosphorus-efficient cultivars have an increased capacity to exploit the soil and/or to convert non-available forms of phosphorus (P) into available ones for root uptake. Preliminary field observations showed that nitrogen (N) inefficient maize cultivar ZD958 exhibited high tolerance to low P soil in the shoot performance than N-efficient cultivar XY335. However, it remains unknown whether ZD958 had

Rice feeds more than 50% of the population worldwide, representing a great energy contribution in low-income families. The exaggerated use of synthetic chemical fertilizers to maintain high levels of yield causes alterations in the physical, chemical and biological quality of the soils. A sustainable alternative is the use of beneficial microorganisms that promote plant growth in crops. The objective

The free amino acids play an important role in total nitrogen (N) absorption for plants. Most previous studies, however, only focused on the organic N uptake of glycine or several simple amino acids by plants. The purpose of this research was to quantify the uptake rate of N derived from multiple amino acids and evaluate the importance of different N forms (amino acid N and inorganic N) to plant nutrition

Zinc deficiency and salinity stress often limits crop production in many calcareous soils. It has been suggested that root organic acids are a response of plants to both conditions. The aim of this hydroponic experiment was to investigate the effect of salinity on organic acids (malic, citric and acetic acids) release by roots in maize plant, under Zinc deficiency conditions. Treatments consisted of

We tested whether root exudation confers high P acquisition efficiency (PAE) in rice by quantifying 13C allocation and rhizosphere phosphatase activity for three contrasting genotypes. Phosphatase activity per root surface was similar for all genotypes, indicating that it is not conferring PAE in rice. DJ123 allocated more 13C from shoots to roots compared to Nerica4 and Chomrong Dhan in accordance