数字农科院2.0

Deciphering the role of rhizosphere microbiota in modulating disease resistance in cabbage varieties

文献类型： 外文期刊

作者： Xingxing Ping;Raja Asad Ali Khan;Shumin Chen;Yang Jiao;Xia Zhuang;Lijun Jiang;Liqun Song;Yuhong Yang;Jianlong Zhao;Yan Li;Zhenchuan Mao;Bingyan Xie;Jian Ling

作者机构：

关键词： Cabbage;Co-occurrence networks;Disease resistance;Fusarium oxysporum f. sp. Conglutinans;Fusarium wilt;Plant defence;Rhizosphere microbes

期刊名称： Microbiome

ISSN： 2049-2618

年卷期： 2024 年 12 卷 1 期

页码：

收录情况： SCIE（2024版）

摘要： Background: Cabbage Fusarium wilt (CFW) is a devastating disease caused by the soil-borne fungus Fusarium oxysporum f. sp. conglutinans (Foc). One of the optimal measures for managing CFW is the employment of tolerant/resistant cabbage varieties. However, the interplay between plant genotypes and the pathogen Foc in shaping the rhizosphere microbial community, and the consequent influence of these microbial assemblages on biological resistance, remains inadequately understood. Results: Based on amplicon metabarcoding data, we observed distinct differences in the fungal alpha diversity index (Shannon index) and beta diversity index (unweighted Bray–Curtis dissimilarity) within the rhizosphere of the YR (resistant to Foc) and ZG (susceptible to Foc) cabbage varieties, irrespective of Foc inoculation. Notably, the Shannon diversity shifts in the resistant YR variety were more pronounced following Foc inoculation. Disease-resistant plant variety demonstrate a higher propensity for harboring beneficial microorganisms, such as Pseudomonas, and exhibit superior capabilities in evading harmful microorganisms, in contrast to their disease-susceptible counterparts. Furthermore, the network analysis was performed on rhizosphere-associated microorganisms, including both bacteria and fungi. The networks of association recovered from YR exhibited greater complexity, robustness, and density, regardless of Foc inoculation. Following Foc infection in the YR rhizosphere, there was a notable increase in the dominant bacterium NA13, which is also a hub taxon in the microbial network. Reintroducing NA13 into the soil significantly improved disease resistance in the susceptible ZG variety, by directly inhibiting Foc and triggering defense mechanisms in the roots. Conclusions: The rhizosphere microbial communities of these two cabbage varieties are markedly distinct, with the introduction of the pathogen eliciting significant alterations in their microbial networks which is correlated with susceptibility or resistance to soil-borne pathogens. Furthermore, we identified a rhizobacteria species that significantly boosts disease resistance in susceptible cabbages. Our results indicated that the induction of resistance genes leading to varied responses in microbial communities to pathogens may partly explain the differing susceptibilities of the cabbage varieties tested to CFW. -meKq2qaHpqpKck3NvZ8m1Video Abstract

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