Linking microbial community composition to farming pattern in selenium-enriched region: Potential role of microorganisms on Se geochemistry

2022 ◽  
Vol 112 ◽  
pp. 269-279
Author(s):  
Yanhong Wang ◽  
Xinyan Shi ◽  
Xianxin Huang ◽  
Chunlei Huang ◽  
Helin Wang ◽  
...  
2019 ◽  
Vol 116 (25) ◽  
pp. 12558-12565 ◽  
Author(s):  
Mathias J. E. E. E. Voges ◽  
Yang Bai ◽  
Paul Schulze-Lefert ◽  
Elizabeth S. Sattely

The factors that contribute to the composition of the root microbiome and, in turn, affect plant fitness are not well understood. Recent work has highlighted a major contribution of the soil inoculum in determining the composition of the root microbiome. However, plants are known to conditionally exude a diverse array of unique secondary metabolites, that vary among species and environmental conditions and can interact with the surrounding biota. Here, we explore the role of specialized metabolites in dictating which bacteria reside in the rhizosphere. We employed a reduced synthetic community (SynCom) of Arabidopsis thaliana root-isolated bacteria to detect community shifts that occur in the absence of the secreted small-molecule phytoalexins, flavonoids, and coumarins. We find that lack of coumarin biosynthesis in f6′h1 mutant plant lines causes a shift in the root microbial community specifically under iron deficiency. We demonstrate a potential role for iron-mobilizing coumarins in sculpting the A. thaliana root bacterial community by inhibiting the proliferation of a relatively abundant Pseudomonas species via a redox-mediated mechanism. This work establishes a systematic approach enabling elucidation of specific mechanisms by which plant-derived molecules mediate microbial community composition. Our findings expand on the function of conditionally exuded specialized metabolites and suggest avenues to effectively engineer the rhizosphere with the aim of improving crop growth in iron-limited alkaline soils, which make up a third of the world’s arable soils.


PLoS ONE ◽  
2016 ◽  
Vol 11 (10) ◽  
pp. e0165448 ◽  
Author(s):  
Marc D. Auffret ◽  
Kristiina Karhu ◽  
Amit Khachane ◽  
Jennifer A. J. Dungait ◽  
Fiona Fraser ◽  
...  

2014 ◽  
Vol 81 (4) ◽  
pp. 1257-1266 ◽  
Author(s):  
Matthieu Barret ◽  
Martial Briand ◽  
Sophie Bonneau ◽  
Anne Préveaux ◽  
Sophie Valière ◽  
...  

ABSTRACTSeeds carry complex microbial communities, which may exert beneficial or deleterious effects on plant growth and plant health. To date, the composition of microbial communities associated with seeds has been explored mainly through culture-based diversity studies and therefore remains largely unknown. In this work, we analyzed the structures of the seed microbiotas of different plants from the family Brassicaceae and their dynamics during germination and emergence through sequencing of three molecular markers: the ITS1 region of the fungal internal transcribed spacer, the V4 region of 16S rRNA gene, and a species-specific bacterial marker based on a fragment ofgyrB. Sequence analyses revealed important variations in microbial community composition between seed samples. Moreover, we found that emergence strongly influences the structure of the microbiota, with a marked reduction of bacterial and fungal diversity. This shift in the microbial community composition is mostly due to an increase in the relative abundance of some bacterial and fungal taxa possessing fast-growing abilities. Altogether, our results provide an estimation of the role of the seed as a source of inoculum for the seedling, which is crucial for practical applications in developing new strategies of inoculation for disease prevention.


2018 ◽  
Vol 118 ◽  
pp. 35-41 ◽  
Author(s):  
Yu-Rong Liu ◽  
Manuel Delgado-Baquerizo ◽  
Jun-Tao Wang ◽  
Hang-Wei Hu ◽  
Ziming Yang ◽  
...  

2004 ◽  
Vol 49 (1) ◽  
pp. 71-82 ◽  
Author(s):  
Andrew Johnson ◽  
Neville Llewellyn ◽  
Jennifer Smith ◽  
Christopher Gast ◽  
Andrew Lilley ◽  
...  

2015 ◽  
Vol 81 (20) ◽  
pp. 6946-6952 ◽  
Author(s):  
Maryam Vahdatzadeh ◽  
Aurélie Deveau ◽  
Richard Splivallo

ABSTRACTTruffles (Tuberspp.) are ascomycete subterraneous fungi that form ectomycorrhizas in a symbiotic relationship with plant roots. Their fruiting bodies are appreciated for their distinctive aroma, which might be partially derived from microbes. Indeed, truffle fruiting bodies are colonized by a diverse microbial community made up of bacteria, yeasts, guest filamentous fungi, and viruses. The aim of this minireview is two-fold. First, the current knowledge on the microbial community composition of truffles has been synthesized to highlight similarities and differences among four truffle (Tuber) species (T. magnatum,T. melanosporum,T. aestivum, andT. borchii) at various stages of their life cycle. Second, the potential role of the microbiome in truffle aroma formation has been addressed for the same four species. Our results suggest that on one hand, odorants, which are common to many truffle species, might be of mixed truffle and microbial origin, while on the other hand, less common odorants might be derived from microbes only. They also highlight that bacteria, the dominant group in the microbiome of the truffle, might also be the most important contributors to truffle aroma not only inT. borchii, as already demonstrated, but also inT. magnatum,T. aestivum, andT. melanosporum.


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