WSQ26ZH2

3385

20 avril 2021 18:23

20 avril 2021 18:23

Biological nitrogen fixation (BNF) refers to a bacterially mediated process by which atmospheric N2 is reduced, either symbiotically or non-symbiotically, into ammonia (NH3) in the presence of the enzyme complex nitrogenase. In N2-fixing grain legumes, BNF is often hampered under low phosphorus (P) availability. Phosphorus plays a vital role in BNF, and the P status of legume, particularly nodules, as well as P availability in the rhizosphere regulate BNF. Besides adequate P fertilization, to ensure nodule functioning, other plant traits (i.e., extensive rooting system and their spatial distribution, hyper-nodulation, root exudates, rhizosphere acidification, and heterogeneity) contribute to greater P uptake and hence BNF. The positive interaction between P availability and BNF can be exploited by beneficial soil P solubilizing microorganisms (PSM). These microorganisms can increase plant-available P by modifying either soil processes in the rhizosphere, or promoting plant traits that lead to increased P uptake by production of plant growth-promoting substances, both of which could indirectly influence the efficiency of BNF in legumes. In this review, we report on the importance of microbial P bio-solubilization as a pathway for improving BNF in grain legumes via PSM and P solubilizing bacteria (PSB). Because BNF in legumes is a P-requiring agro-ecological process, the ability of soil PSB to synergize with the rhizobial strains is likely a key belowground process worth investigating for advanced research aiming to improve rhizosphere biological functions necessary for sustainable legume-base cropping systems.

None

• AB - Utile à l'AB
• FREDO fertilisation
• FREDO santé végétale
• GEO Global
• GEO Maroc
• azote

• inoculant
• nitrogen fixation
• rhizobia
• crops
• legumes
• nodules
• rhizosphere
• sustainability

Frontiers in Agronomy

3

2021

10.3389/fagro.2021.637196 Le DOI est une URL unique de référencement d'une publication. Il est donc plus fiable et permanent qu'une URL classique

2673-3218 L’ISSN est un code de 8 chiffres servant à identifier les journaux, revues, magazines, périodiques de toute nature et sur tous supports, papier comme électronique.