The ecologically relevant genetics of plant–plant interactions

Becker, Claude; Berthomé, Richard; Delavault, Philippe; Flutre, Timothée; Fréville, Hélène; Gibot‐Leclerc, Stéphanie; Corre, Valérie Le; Morel, Jean-Benoît; Moutier, Nathalie; Muños, Stéphane; Richard‐Molard, Céline; Westwood, James H.; Courty, Pierre-Emmanuel; Germain, Alexandre de Saint; Louarn, Gaëtan; Roux, Fabrice

doi:10.1016/j.tplants.2022.08.014

Cited by 8 publications

(7 citation statements)

References 106 publications

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“…This finding is the first large‐scale evidence, besides available scare reports (Bowsher et al ., 2017; Subrahmaniam et al ., 2018), that healthy plants can affect transcription in their intraspecific neighbours. Our findings raise many questions on how plants molecularly react to neighbours that should be answered more broadly, an important challenge when studying plant communities (The International PLANTCOM Network et al ., 2022).…”

Section: Discussionmentioning

confidence: 99%

“…In plants, very few genome‐wide association studies (GWAS) approaches have been undertaken to explore the response of a given focal plant to a various range of intraspecific neighbour plants (Subrahmaniam et al ., 2018). However, such approaches may provide essential clues on the major force driving plant community dynamics and crop yield (The International PLANTCOM Network et al ., 2022). For instance, the analysis of the developmental response of one focal Arabidopsis thaliana ecotype to diverse neighbours allowed the identification of genetic loci in the neighbours that affected size and fitness‐related traits (Mutic & Wolf, 2007).…”

Section: Introductionmentioning

confidence: 99%

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A major genetic locus in neighbours controls changes of gene expression and susceptibility in intraspecific rice mixtures

et al. 2023

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Summary Reports indicate that intraspecific neighbours alter the physiology of focal plants, and with a few exceptions, their molecular responses to neighbours are unknown. Recently, changes in susceptibility to pathogen resulting from such interactions were demonstrated, a phenomenon called neighbour‐modulated susceptibility (NMS). However, the genetics of NMS and the associated molecular responses are largely unexplored. Here, we analysed in rice the modification of biomass and susceptibility to the blast fungus pathogen in the Kitaake focal genotype in the presence of 280 different neighbours. Using genome‐wide association studies, we identified the loci in the neighbour that determine the response in Kitaake. Using a targeted transcriptomic approach, we characterized the molecular responses in focal plants co‐cultivated with various neighbours inducing a reduction in susceptibility. Our study demonstrates that NMS is controlled by one major locus in the rice genome of its neighbour. Furthermore, we show that this locus can be associated with characteristic patterns of gene expression in focal plant. Finally, we propose an hypothesis where Pi could play a role in explaining this case of NMS. Our study sheds light on how plants affect the physiology in their neighbourhood and opens perspectives for understanding plant–plant interactions.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A major genetic locus in neighbours controls changes of gene expression and susceptibility in intraspecific rice mixtures

et al. 2023

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“…Moreover, there are already multiple examples of single genetic elements influencing social organization and collective behaviours in animals (Nelson et al ., 2007; Wang et al ., 2013). The greenbeard concept provides a theoretical foundation to explain how such genetic elements could work and how they could evolve, and as such, represents a promising (and unexplored) avenue to better understand the genetic basis of plant–plant interactions (Subrahmaniam et al ., 2018; Becker et al ., 2022).…”

Section: Perspectives For Greenbeard Research In Plantsmentioning

confidence: 99%

Greenbeards in plants?

Montazeaud,

Keller

2024

New Phytologist

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SummaryGreenbeards are selfish genetic elements that make their bearers behave either altruistically towards individuals bearing similar greenbeard copies or harmfully towards individuals bearing different copies. They were first proposed by W.D. Hamilton over 50 yr ago, to illustrate that kin selection may operate at the level of single genes. Examples of greenbeards have now been reported in a wide range of taxa, but they remain undocumented in plants. In this paper, we discuss the theoretical likelihood of greenbeard existence in plants. We then question why the greenbeard concept has never been applied to plants and speculate on how hypothetical greenbeards could affect plant–plant interactions. Finally, we point to different research directions to improve our knowledge of greenbeards in plants.

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“…However, a debate has developed in the literature about this rhizospheric communication on whether plants have belowground self and non-self-recognition and has attempted to conceptualize this interaction with several terms and definitions 7 , 8 . Root–root interactions can occur either interspecifically, between the members of different plant species, or intraspecifically, within the individuals of the same species 3 , 9 , 10 . As the changes in root morphology may vary depending on environmental conditions, it is difficult to conclude the general response(s) caused specifically by their neighbours 11 , 12 .…”

Section: Introductionmentioning

confidence: 99%

Neighbour-induced changes in root exudation patterns of buckwheat results in altered root architecture of redroot pigweed

Eroğlu,

Bennett,

Steininger-Mairinger

et al. 2024

Sci Rep

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Roots are crucial in plant adaptation through the exudation of various compounds which are influenced and modified by environmental factors. Buckwheat root exudate and root system response to neighbouring plants (buckwheat or redroot pigweed) and how these exudates affect redroot pigweed was investigated. Characterising root exudates in plant–plant interactions presents challenges, therefore a split-root system which enabled the application of differential treatments to parts of a single root system and non-destructive sampling was developed. Non-targeted metabolome profiling revealed that neighbour presence and identity induces systemic changes. Buckwheat and redroot pigweed neighbour presence upregulated 64 and 46 metabolites, respectively, with an overlap of only 7 metabolites. Root morphology analysis showed that, while the presence of redroot pigweed decreased the number of root tips in buckwheat, buckwheat decreased total root length and volume, surface area, number of root tips, and forks of redroot pigweed. Treatment with exudates (from the roots of buckwheat and redroot pigweed closely interacting) on redroot pigweed decreased the total root length and number of forks of redroot pigweed seedlings when compared to controls. These findings provide understanding of how plants modify their root exudate composition in the presence of neighbours and how this impacts each other’s root systems.

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The ecologically relevant genetics of plant–plant interactions

Cited by 8 publications

References 106 publications

A major genetic locus in neighbours controls changes of gene expression and susceptibility in intraspecific rice mixtures

A major genetic locus in neighbours controls changes of gene expression and susceptibility in intraspecific rice mixtures

Greenbeards in plants?

Neighbour-induced changes in root exudation patterns of buckwheat results in altered root architecture of redroot pigweed

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