Functional Microbial Features Driving Community Assembly During Seed Germination and Emergence

TitreFunctional Microbial Features Driving Community Assembly During Seed Germination and Emergence
Type de publicationArticle de revue
AuteurTorres-Cortés, Gloria , Bonneau, Sophie , Bouchez, Olivier, Genthon, Clémence, Briand, Martial , Jacques, Marie-Agnès , Barret, Matthieu
Editeur Frontiers Research Foundation
TypeArticle scientifique dans une revue à comité de lecture
Titre de la revueFrontiers in Plant Science
Mots-cléscopiotrophy, metagenomics, plant microbial communities, seed germination, seed microbiome
Résumé en anglais

Microbial interactions occurring on and around seeds are especially important for plant fitness since seed-borne microorganisms are the initial source of inoculum for the plant microbiota. In this study, we analyze structural and functional changes occurring within the plant microbiota at these early stages of the plant cycle, namely germination and emergence. To this purpose, we performed shotgun DNA sequencing of microbial assemblages associated to seeds, germinating seeds and seedlings of two plant species: bean and radish. We observed an enrichment of and during emergence and a set of functional traits linked to copiotrophy that could be responsible for this selection as a result of an increase of nutrient availability after germination. Representative bacterial isolates of taxa that are selected in seedlings showed indeed faster bacterial growth rate in comparison to seed-associated bacteria isolates. Finally, binning of metagenomics contigs results in the reconstruction of population genomes of the major bacterial taxa associated to the samples. Together, our results demonstrate that, although seed microbiota varied across plant species, nutrient availability during germination elicits changes of the composition of microbial communities by potentially selecting microbial groups with functional traits linked to copiotrophy. The data presented here represents the first attempts to empirically assess changes in the microbial community during plant emergence and moves us toward a more holistic understanding of the plant microbiome.

URL de la notice
Lien vers le document

Titre abrégéFront Plant Sci
Identifiant (ID) PubMed30008730
PubMed Central IDPMC6034153