Benefits of phosphate solubilizing bacteria on belowground crop performance for improved crop acquisition of phosphorus


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Output type: Journal article review

UM6P affiliated Publication?: Yes

Author list: Bargaz A., Elhaissoufi W., Khourchi S., Benmrid B., Borden K.A., Rchiad Z.

Publisher: ELSEVIER GMBH

Publication year: 2021

Journal: MICROBIOLOGICAL RESEARCH (0944-5013)

Journal acronym: MICROBIOL RES

Volume number: 252

ISSN: 0944-5013

URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85113308194&doi=10.1016%2fj.micres.2021.126842&partnerID=40&md5=a01e4ac106453b1093e360d385e2a4d0

Languages: English (EN-GB)


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Abstract

Although research on plant growth promoting bacteria began in the 1950s, basic and applied research on bacteria improving use of phosphorus (P) continues to be a priority among many agricultural research institutions. Ultimately, identifying agriculturally beneficial microbes, notably P solubilizing bacteria (PSB), that enhance the efficient use of P supports more sustainable cropping systems and the judicious use of mineral nutrients. In parallel, there is more attention on improving crop root P acquisition of existing soil P pools as well as by increasing the proportion of fertilizer P that is taken up by crops. Today, new lines of research are emerging to investigate the co-optimization of PSB-fertilizer-crop root processes for improved P efficiency and agricultural performance. In this review, we compile and summarize available findings on the beneficial effects of PSB on crop production with a focus on crop P acquisition via root system responses at the structural, functional and transcriptional levels. We discuss the current state of knowledge on the mechanisms of PSB-mediated P availability, both soil- and root-associated, as well as crop uptake via P solubilization, mineralization and mobilization, mainly through the production of organic acids and P-hydrolyzing enzymes, and effects on phytohormone signaling for crop root developement. The systematic changes caused by PSB on crop roots are discussed and contextualized within promising functional trait-based frameworks. We also detail agronomic profitability of P (mineral and organic) and PSB co-application, in amended soils and inoculated crops, establishing the connection between the influence of PSB on agroecosystem production and the impact of P fertilization on microbial diversity and crop functional traits for P acquisition. © 2021 Elsevier GmbH


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Last updated on 2021-23-11 at 23:16