Work

Metagenomic Analysis to Assess the Impact of Plant Growth-Promoting Rhizobacteria on Peanut ( Arachis hypogaea L.) Crop Production and Soil Enzymes and Microbial Diversity

Year: 2024

Type: article

Abstract: High Resolution Image Download MS PowerPoint Slide Peanut production could be increased through plant growth-promoting rhizobacteria (PGPR). In this regard, the present field research aimed at elucidating the impact of PGPR on peanut yield, soil enzyme activity, microbial diversity, and structure. Three PGPR strains ( Bacillus velezensis, RI3; Bacillus velezensis, SC6; Pseudomonas psychrophila, P10) were evaluated, along with Bradyrhizobium japonicum (BJ), taken as a control. PGPR increased seed yield by 8%, improving the radiation use efficiency (4–14%). PGPR modified soil enzymes (fluorescein diacetate activity by 17% and dehydrogenase activity by 28%) and microbial abundance (12%). However, PGPR did not significantly alter microbial diversity; nonetheless, it modified the relative abundance of key phyla (Actinobacteria > Proteobacteria > Firmicutes) and genera ( Bacillus > Arthrobacter > Pseudomonas ). PGPRs modified the relative abundance of genes associated with N-fixation and nitrification while increasing genes related to N-assimilation and N-availability. PGPR improved agronomic traits without altering rhizosphere diversity.

Source: Journal of Agricultural and Food Chemistry

DOI: 10.1021/acs.jafc.4c05687