Bacillus species are core microbiota of resistant maize cultivars that induce host metabolic defense against corn stalk rot
文献类型: 外文期刊
作者: Xinyao Xia;Qiuhe Wei;Hanxiang Wu;Xinyu Chen;Chunxia Xiao;Yiping Ye;Chaotian Liu;Haiyue Yu;Yuanwen Guo;Wenxian Sun;Wende Liu
作者机构:
关键词: Bacillus;Compartments;Corn stalk rot;Microbiome;Resistance
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: Microbes colonizing each compartment of terrestrial plants are indispensable for maintaining crop health. Although corn stalk rot (CSR) is a severe disease affecting maize (Zea mays) worldwide, the mechanisms underlying host-microbe interactions across vertical compartments in maize plants, which exhibit heterogeneous CSR-resistance, remain largely uncharacterized. RESULTS: Here, we investigated the microbial communities associated with CSR-resistant and CSR-susceptible maize cultivars using multi-omics analysis coupled with experimental verification. Maize cultivars resistant to CSR reshaped the microbiota and recruited Bacillus species with three phenotypes against Fusarium graminearum including niche pre-emption, potential secretion of antimicrobial compounds, and no inhibition to alleviate pathogen stress. By inducing the expression of Tyrosine decarboxylase 1 (TYDC1), encoding an enzyme that catalyzes the production of tyramine and dopamine, Bacillus isolates that do not directly suppress pathogen infection induced the synthesis of berberine, an isoquinoline alkaloid that inhibits pathogen growth. These beneficial bacteria were recruited from the rhizosphere and transferred to the stems but not grains of the CSR-resistant plants. CONCLUSIONS: The current study offers insight into how maize plants respond to and interact with their microbiome and lays the foundation for preventing and treating soil-borne pathogens. Video Abstract.
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