AUTHOR=Tang Tongtong , Sun Xing , Liu Qin , Dong Yuanhua , Zha Mingfang 

TITLE=Treatment with organic manure inoculated with a biocontrol agent induces soil bacterial communities to inhibit tomato Fusarium wilt disease

JOURNAL=Frontiers in Microbiology

VOLUME=13

YEAR=2023

URL=https://www.frontiersin.org/journals/microbiology/articles/10.3389/fmicb.2022.1006878

DOI=10.3389/fmicb.2022.1006878

ISSN=1664-302X

ABSTRACT=<sec><title>Introduction</title><p>Organic manure, plant growth-promoting microorganisms, and biocontrol agents are widely used to sustainably control soil-borne diseases. However, how and whether organic manure inoculated with biocontrol agents alters soil microbiota and reduces disease severity is poorly understood.</p></sec><sec><title>Methods</title><p>Here, we examined changes to the soil microbial community, soil properties, and incidence of <italic>Fusarium</italic> wilt disease in response to several fertilization regimes. Specifically, we studied the effects of inorganic chemical fertilization (<italic>CF</italic>), organic manure fertilization (OF), and <italic>Erythrobacter</italic> sp. YH-07-inoculated organic manure fertilization (BF) on the incidence of <italic>Fusarium</italic> wilt in tomato across three seasons.</p></sec><sec><title>Results</title><p>BF-treated soils showed increased microbial abundance, richness, and diversity compared to other treatments, and this trend was stable across seasons. BF-treated soils also exhibited a significantly altered microbial community composition, including increased abundances of <italic>Bacillus</italic>, <italic>Altererythrobacter</italic>, <italic>Cryptococcus</italic>, and <italic>Saprospiraceae</italic>, and decreased abundances of <italic>Chryseolinea</italic> and <italic>Fusarium</italic>. Importantly, BF treatment significantly suppressed the incidence of Fusarium wilt in tomato, likely due to direct suppression by <italic>Erythrobacter</italic> sp. YH-07 and indirect suppression through changes to the microbial community composition and soil properties.</p></sec><sec><title>Discussion</title><p>Taken together, these results suggest that <italic>Erythrobacter</italic> sp. YH-07-inoculated organic manure is a stable and sustainable soil amendment for the suppression of <italic>Fusarium</italic> wilt diseases.</p></sec>