Genotypic variability for tolerance to low soil phosphorus availability in faba bean ( Vicia faba L.)
2022
Brahimi, Samira | Toumatia, Omrane | Drevon, Jean Jacques | Lazali, Mohamed | Zitouni, Abdelghani | Université de Djilali Bounaama Khemis Miliana (univ-DBKM) | Laboratoire de Biologie des Systèmes Microbiens - LBSM (Alger, Algeria) ; École normale supérieure - Kouba-Alger (ENS Kouba-Alger) | Ecologie fonctionnelle et biogéochimie des sols et des agro-écosystèmes (UMR Eco&Sols) ; Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut de Recherche pour le Développement (IRD)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Institut Agro - Montpellier SupAgro ; Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro) | Algerian Ministry of Higher Education and Scientific Research (PRFU project (D04N01UN440120180001) | European Project: 618127,EC:FP7:KBBE,FP7-ERANET-2013-RTD,ARIMNET2(2014)
International audience
Afficher plus [+] Moins [-]anglais. The capacity of legumes to fix atmospheric dinitrogen in partnership with rhizobia provides an input-saving and resource-conserving alternative, thereby reducing the need for chemical fertilizers while enhancing overall crop productivity. However, low soil nutrient availability, notably phosphorus (P), is among the most nutrient limitations for legumes, since legume nodules responsible for N-2 fixation have a high P requirement. In order to explore the genetic variability for P uptake and use efficiency in low-P availability in soils, three faba bean genotypes namely Sidi Aich, Castel and Diva were studied in two field sites (S1 and S2) over two growing seasons 2018 and 2019. At flowering stage, plants were harvested and analyzed for their nodulation, growth, P content and yield. Results indicate that low-P availability in the soil of S1 significantly limited plant growth, nodulation, and grain yield for all genotypes though with highest extent for Diva and Castel. We found a significant correlation between nodule growth of all genotypes and Olsen-P content in the rhizosphere soil during two growing seasons. It is concluded that the genotypes selected for their P uptake and use efficiency had a higher yield and could best adapt to low-P availability under field conditions.
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