Skip to Main content Skip to Navigation
Preprints, Working Papers, ...

Changes in wheat rhizosphere microbiota in response to chemical inputs, plant genotype and phenotypic plasticity

Abstract : Since modern wheat varieties are grown with chemical inputs, we ignore if changes observed in rhizosphere microorganisms between ancient and modern varieties are due to i) breeding-induced changes in plant genotype, ii) modifications of the environment via synthetic chemical inputs, or (iii) phenotypic plasticity, defined as the interaction between the genotype and the environment. In the field, we evaluated the effects of various wheat varieties (modern and ancient) grown with or without chemical inputs (N-fertilizer, fungicide and herbicide together) in a crossed factorial design. We analysed rhizosphere bacteria and fungi by amplicons sequencing and mycorrhizal association by microscopic observations. When considered independently of plant genotype, chemical inputs were responsible for an increase in dominance for bacteria and decrease in evenness for bacteria and fungi. Independently of inputs, modern varieties had richer and more even bacterial communities compared to ancient varieties. Phenotypic plasticity had a significant effect: bacterial and fungal diversity decreased when inputs were applied in ancient varieties but not in modern ones. Mycorrhiza were more abundant in modern than ancient varieties, and less abundant when using chemical inputs. Although neglected, phenotypic plasticity is important to understand the evolution of plant-microbiota associations and a relevant target in breeding programs.
Document type :
Preprints, Working Papers, ...
Complete list of metadata

https://hal-agrosup-dijon.archives-ouvertes.fr/hal-03275892
Contributor : Admin Agrosupdijon Connect in order to contact the contributor
Submitted on : Thursday, July 1, 2021 - 2:41:30 PM
Last modification on : Friday, July 2, 2021 - 3:44:10 AM

Links full text

Identifiers

Citation

Samuel Jacquiod, Tiffany Raynaud, Eric Pimet, Chantal Ducourtieux, Leonardo Casieri, et al.. Changes in wheat rhizosphere microbiota in response to chemical inputs, plant genotype and phenotypic plasticity. 2021. ⟨hal-03275892⟩

Share

Metrics

Record views

30