Boivin Stéphane, Lepetit M. (2020). Partner preference in the legume-rhizobia symbiosis and impact on legume inoculation strategies. Advances in Botanical Research : Regulation of Nitrogen-Fixing Symbioses in Legumes, 94, 323-348. ISSN 0065-2296.
Titre du document
Partner preference in the legume-rhizobia symbiosis and impact on legume inoculation strategies
Advances in Botanical Research : Regulation of Nitrogen-Fixing Symbioses in Legumes, 2020,
94, 323-348 ISSN 0065-2296
Legumes interact with diverse soil bacteria of the genus Rhizobium to form dinitrogen (N-2)-fixing symbiotic root nodules. This symbiotic interaction occurs under plant nitrogen (N)-deficit and only between compatible partners. When young nodules are formed, bacteroids begin to fix atmospheric N-2 and provide ammonium to the plant which in return provides phytosynthates to the bacteria. Ability and Competitiveness to Form root Nodules (AFN and CFN) within natural populations have a strong impact on early partner choice. In soil, there are frequently multiple compatible partners and legume roots are often colonized by multiple rhizobia displaying different Symbiotic N-2 Fixation (SNF) efficiencies. In mature nodules, Post-Infection Partner Preference (PIPP) shape partner choice by favoring effective symbiotic N-2 fixing structures to the expense of inefficient ones. Little is known about mechanisms involved in legume-rhizobium partner choices despite the relevance of this trait to design new strategies to improve inoculation of legume crops.
Plan de classement
Sciences du monde végétal [076]
;
Biotechnologies [084]
