Wheat Rhizosphere Microbiota Respond to Changes in Plant Genotype, Chemical Inputs, and Plant Phenotypic Plasticity

Jacquiod, Samuel; Raynaud, Tiffany; Pimet, Eric; Ducourtieux, Chantal; Casieri, Leonardo; Wipf, Daniel; Blouin, Manuel

doi:10.3389/fevo.2022.903008

Cited by 9 publications

(5 citation statements)

References 81 publications

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“…The conclusions of the three methods of microbiome core definition suggest the presence of generalists, i.e., some representative microorganisms from Proteobacteria, Actinobacteria, Hypomicrobiaceae, Bradyrhizobiaceae, Sphingomonas sp., in the wheat rhizomicrobiome. In support of these results, it should be mentioned that Jacquiod et al [ 39 ] found a dominance of Proteobacteria, Actinobacteria, and Bacteroidetes OTUs in wheat core. These authors reported that plant genotype and phenotypic plasticity had the most influence on the rhizosphere microbiota, whereas inputs had only marginal effects [ 39 ].…”

Section: Discussionsupporting

confidence: 65%

“…In support of these results, it should be mentioned that Jacquiod et al [ 39 ] found a dominance of Proteobacteria, Actinobacteria, and Bacteroidetes OTUs in wheat core. These authors reported that plant genotype and phenotypic plasticity had the most influence on the rhizosphere microbiota, whereas inputs had only marginal effects [ 39 ]. Most of the Hyphomicrobiaceae were oligotrophic species, and the species of Sphingomonadaceae are able to utilize a wide diversity of organic compounds and to grow and survive under low-nutrient conditions [ 40 ].…”

Section: Discussionsupporting

confidence: 65%

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Ecological Diversity of Bacterial Rhizomicrobiome Core during the Growth of Selected Wheat Cultivars

Kuźniar,

Włodarczyk,

Jurczyk

et al. 2023

Biology

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One of the latest ecological concepts is the occurrence of a biased rhizosphere of microorganisms recruited mostly through interactions among various components of the rhizosphere, including plant roots and the bulk soil microbiome. We compared the diverse attributes of the core microbiome of wheat rhizosphere communities with wheat (W) and legume (L) forecrops determined by three different methods in this study (membership, composition, and functionality). The conclusions of the three methods of microbiome core definition suggest the presence of generalists, i.e., some representative microorganisms from Proteobacteria, Actinobacteria, Hypomicrobiaceae, Bradyrhizobiaceae, Sphingomonas sp., in the wheat rhizomicrobiome. The relative abundance of the core microbiome accounted for 0.1976% (W) and 0.334% (L)—membership method and 6.425% (W) and 4.253% (L)—composition method. Additionally, bacteria of the specialist group, such as Rhodoplanes sp., are functionally important in the rhizomicrobiome core. This small community is strongly connected with other microbes and is essential for maintenance of the sustainability of certain metabolic pathways.

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Section: Discussionsupporting

confidence: 65%

Section: Discussionsupporting

confidence: 65%

Ecological Diversity of Bacterial Rhizomicrobiome Core during the Growth of Selected Wheat Cultivars

Kuźniar,

Włodarczyk,

Jurczyk

et al. 2023

Biology

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“…Furthermore, we found that ploidy level and fertilization interactively influenced the rhizobacterial community composition ( Fig. 2C , Data S2 ) suggesting that microbial communities in the root environment are shaped by interactions between agricultural management practices such as fertilization conditions, and host selection processes which are dependent on genomic content [ 28 , 73 ].…”

Section: Discussionmentioning

confidence: 99%

“…when invading the rhizosphere, particularly during early land colonization. This could suggest that the Bacteroidota are key early microbial colonizers of plants as indicated by their high abundances in the rhizosphere of wild sugar beet [ 90 ], barley [ 91 ], lettuce [ 92 ], rice [ 93 ], common bean grown in agricultural soil [ 94 ], other wild plant species [ 78 ], and now wheat (supported by [ 26 , 28 ]). This combination of complex biopolymer utilization and organophosphorus utilization provides a distinct metabolic niche for Bacteroidota and facilitates the coexistence with other rhizobacteria that specialize in the acquisition of low molecular weight liable C such as Pseudomonas and Burkholderiales.…”

Section: Discussionmentioning

confidence: 99%

Agricultural intensification reduces selection of putative plant growth-promoting rhizobacteria in wheat

Reid,

Kavamura,

Torres-Ballesteros

et al. 2024

The ISME Journal

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The complex evolutionary history of wheat has shaped its associated root microbial community. However, consideration of impacts from agricultural intensification have been limited. This study investigated how endogenous (genome polyploidization), and exogenous (introduction of chemical fertilizers) factors have shaped beneficial rhizobacterial selection. We combined culture -independent and -dependent methods to analyze rhizobacterial community composition and its associated functions at the root-soil interface from a range of ancestral and modern wheat genotypes, grown with and without the addition of chemical fertilizer. In controlled pot experiments, fertilization and soil compartment (rhizosphere, rhizoplane) were the dominant factors shaping rhizobacterial community composition, whereas the expansion of the wheat genome from diploid to allopolyploid caused the next greatest variation. Rhizoplane-derived culturable bacterial collections tested for plant growth-promoting (PGP) traits revealed that fertilization reduced the abundance of putative plant growth-promoting rhizobacteria (PGPR) in allopolyploid wheats but not in wild wheat progenitors. Taxonomic classification of these isolates showed that these differences were largely driven by reduced selection of beneficial root bacteria representative of the Bacteroidota phylum in allopolyploid wheats. Furthermore, the complexity of supported beneficial bacterial populations in hexaploid wheats was greatly reduced in comparison to diploid wild wheats. We therefore propose that the selection of root-associated bacterial genera with PGP functions may be impaired by crop domestication in a fertilizer-dependent manner, a potentially crucial finding to direct future plant breeding programs to improve crop production systems in a changing environment.

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“…This trend is likely due to the incorporation of dwar ng genes in the 1960s (Matus et al 2012;McGrail and McNear 2021) and the application of inorganic fertilizers in excess of the plant's needs. These factors result in a high availability of nutrients, so the plant does not need to invest resources in developing its root system to intercept these nutrients (Jacquiod et al 2022;McGrail and McNear 2021).…”

Section: )mentioning

confidence: 99%

Exploring root architecture and rhizosphere biology in fourteen winter wheat varieties released in Chile from 1965 to 2020

Paz-Vidal¹,

Castillo-Rosales²,

López³

et al. 2023

Preprint

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Background and Aims. The study aims to explore the impact of advancements in wheat genetics on root structure and rhizosphere biology, which are still not fully understood. Specifically, we investigated various factors including the exudation of carboxylates, colonization by arbuscular mycorrhizal fungi, microbial activity, and root architecture in winter wheat varieties that have been released between 1965 and 2020. Methods. To conduct our study, we sowed fourteen different winter wheat varieties with four replicates on acidic Andisol at field conditions. Complete root systems and soil samples were extracted using a tractor-mounted hydraulic sampler tube of 3.5 cm diameter, which reached a depth of 60 cm. Results. In this sense, succinate showed a significant increase by 21%. Mycorrhizal colonization was inversely proportional to P concentrations and all varieties showed higher microbial activity at anthesis. The longest roots were found in varieties released after the year 2000, but no significant differences were found in other root architecture parameters. There was no clear pattern observed in root architecture or biological activity as a function of the year of release. Plant genetics moderated root architecture, carboxylate exudation, microbial activity, and mycorrhizal colonization, all of which are affected by high P concentrations. Conclusions. This study investigated plant-microorganism interactions, often overlooked due to root system analysis challenges. Older wheat varieties showed higher carboxylate exudation. We identified wheat varieties with potential for improved root systems and crop efficiency.

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Wheat Rhizosphere Microbiota Respond to Changes in Plant Genotype, Chemical Inputs, and Plant Phenotypic Plasticity

Cited by 9 publications

References 81 publications

Ecological Diversity of Bacterial Rhizomicrobiome Core during the Growth of Selected Wheat Cultivars

Ecological Diversity of Bacterial Rhizomicrobiome Core during the Growth of Selected Wheat Cultivars

Agricultural intensification reduces selection of putative plant growth-promoting rhizobacteria in wheat

Exploring root architecture and rhizosphere biology in fourteen winter wheat varieties released in Chile from 1965 to 2020

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