Genetic control of rhizosheath formation in pearl millet.

Autor: de la Fuente Cantó C; DIADE, Université de Montpellier, IRD, CIRAD, Montpellier, France., Diouf MN; Eco&Sols, Université de Montpellier, IRD, CIRAD, INRAE, Institut Agro, Montpellier, France.; Laboratoire Mixte International Intensification Écologique Des Sols Cultivés en Afrique de L'Ouest (IESOL), Dakar, Senegal.; Département de Biologie Végétale, Faculté Des Sciences Et Techniques, Université Cheikh Anta Diop, Dakar, Sénégal., Ndour PMS; Eco&Sols, Université de Montpellier, IRD, CIRAD, INRAE, Institut Agro, Montpellier, France.; Laboratoire Mixte International Intensification Écologique Des Sols Cultivés en Afrique de L'Ouest (IESOL), Dakar, Senegal., Debieu M; DIADE, Université de Montpellier, IRD, CIRAD, Montpellier, France., Grondin A; DIADE, Université de Montpellier, IRD, CIRAD, Montpellier, France.; Laboratoire Mixte International Adaptation Des Plantes Et Microorganismes Associés Aux Stress Environnementaux (LAPSE), Centre de recherche de Bel-Air, Dakar, Senegal.; CERAAS, Thiès, Senegal., Passot S; DIADE, Université de Montpellier, IRD, CIRAD, Montpellier, France., Champion A; DIADE, Université de Montpellier, IRD, CIRAD, Montpellier, France., Barrachina C; Montpellier GenomiX, Montpellier, France., Pratlong M; Montpellier GenomiX, Montpellier, France., Gantet P; DIADE, Université de Montpellier, IRD, CIRAD, Montpellier, France., Assigbetsé K; Eco&Sols, Université de Montpellier, IRD, CIRAD, INRAE, Institut Agro, Montpellier, France.; Laboratoire Mixte International Intensification Écologique Des Sols Cultivés en Afrique de L'Ouest (IESOL), Dakar, Senegal., Kane N; Laboratoire Mixte International Adaptation Des Plantes Et Microorganismes Associés Aux Stress Environnementaux (LAPSE), Centre de recherche de Bel-Air, Dakar, Senegal., Cubry P; DIADE, Université de Montpellier, IRD, CIRAD, Montpellier, France., Diedhiou AG; Laboratoire Mixte International Adaptation Des Plantes Et Microorganismes Associés Aux Stress Environnementaux (LAPSE), Centre de recherche de Bel-Air, Dakar, Senegal.; Département de Biologie Végétale, Faculté Des Sciences Et Techniques, Université Cheikh Anta Diop, Dakar, Sénégal., Heulin T; Aix Marseille Univ, CEA, CNRS, BIAM, LEMiRE, Laboratory of Microbial Ecology of the Rhizosphere, ECCOREV FR 3098, 13108, Saint Paul-Lez-Durance, France., Achouak W; Aix Marseille Univ, CEA, CNRS, BIAM, LEMiRE, Laboratory of Microbial Ecology of the Rhizosphere, ECCOREV FR 3098, 13108, Saint Paul-Lez-Durance, France., Vigouroux Y; DIADE, Université de Montpellier, IRD, CIRAD, Montpellier, France., Cournac L; Eco&Sols, Université de Montpellier, IRD, CIRAD, INRAE, Institut Agro, Montpellier, France., Laplaze L; DIADE, Université de Montpellier, IRD, CIRAD, Montpellier, France. laurent.laplaze@ird.fr.; Laboratoire Mixte International Adaptation Des Plantes Et Microorganismes Associés Aux Stress Environnementaux (LAPSE), Centre de recherche de Bel-Air, Dakar, Senegal. laurent.laplaze@ird.fr.
Jazyk: angličtina
Zdroj: Scientific reports [Sci Rep] 2022 Jun 02; Vol. 12 (1), pp. 9205. Date of Electronic Publication: 2022 Jun 02.
DOI: 10.1038/s41598-022-13234-w
Abstrakt: The rhizosheath, the layer of soil that adheres strongly to roots, influences water and nutrients acquisition. Pearl millet is a cereal crop that plays a major role for food security in arid regions of sub-Saharan Africa and India. We previously showed that root-adhering soil mass is a heritable trait in pearl millet and that it correlates with changes in rhizosphere microbiota structure and functions. Here, we studied the correlation between root-adhering soil mass and root hair development, root architecture, and symbiosis with arbuscular mycorrhizal fungi and we analysed the genetic control of this trait using genome wide association (GWAS) combined with bulk segregant analysis and gene expression studies. Root-adhering soil mass was weakly correlated only to root hairs traits in pearl millet. Twelve QTLs for rhizosheath formation were identified by GWAS. Bulk segregant analysis on a biparental population validated five of these QTLs. Combining genetics with a comparison of global gene expression in the root tip of contrasted inbred lines revealed candidate genes that might control rhizosheath formation in pearl millet. Our study indicates that rhizosheath formation is under complex genetic control in pearl millet and suggests that it is mainly regulated by root exudation.
(© 2022. The Author(s).)
Databáze: MEDLINE
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