芽孢杆菌是抗性玉米栽培品种的核心微生物群,能诱导宿主对玉米茎腐病进行新陈代谢防御。

IF 13.8 1区 生物学 Q1 MICROBIOLOGY
Xinyao Xia, Qiuhe Wei, Hanxiang Wu, Xinyu Chen, Chunxia Xiao, Yiping Ye, Chaotian Liu, Haiyue Yu, Yuanwen Guo, Wenxian Sun, Wende Liu
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引用次数: 0

摘要

背景:陆生植物各分区中的微生物是维持作物健康不可或缺的因素。虽然玉米茎腐病(CSR)是影响全球玉米(Zea mays)的一种严重病害,但玉米植物表现出不同的 CSR 抗性,其宿主与微生物在垂直分区间相互作用的机制在很大程度上仍未得到表征:结果:在此,我们利用多组学分析和实验验证,研究了与抗 CSR 和易感 CSR 玉米栽培品种相关的微生物群落。抗CSR的玉米栽培品种重塑了微生物群落,并招募了具有三种表型的芽孢杆菌来对抗禾本科镰刀菌,包括抢占生态位、潜在分泌抗菌化合物和无抑制作用以减轻病原体压力。通过诱导酪氨酸脱羧酶 1(TYDC1)(编码一种催化酪胺和多巴胺生成的酶)的表达,不直接抑制病原体感染的芽孢杆菌分离物诱导了小檗碱(一种抑制病原体生长的异喹啉生物碱)的合成。这些有益细菌从根瘤菌层被招募并转移到抗 CSR 植物的茎上,而不是谷粒上:目前的研究有助于深入了解玉米植物如何对其微生物组做出反应并与其相互作用,为预防和治疗土传病原体奠定了基础。视频摘要
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Bacillus species are core microbiota of resistant maize cultivars that induce host metabolic defense against corn stalk rot.

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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来源期刊
Microbiome
Microbiome MICROBIOLOGY-
CiteScore
21.90
自引率
2.60%
发文量
198
审稿时长
4 weeks
期刊介绍: Microbiome is a journal that focuses on studies of microbiomes in humans, animals, plants, and the environment. It covers both natural and manipulated microbiomes, such as those in agriculture. The journal is interested in research that uses meta-omics approaches or novel bioinformatics tools and emphasizes the community/host interaction and structure-function relationship within the microbiome. Studies that go beyond descriptive omics surveys and include experimental or theoretical approaches will be considered for publication. The journal also encourages research that establishes cause and effect relationships and supports proposed microbiome functions. However, studies of individual microbial isolates/species without exploring their impact on the host or the complex microbiome structures and functions will not be considered for publication. Microbiome is indexed in BIOSIS, Current Contents, DOAJ, Embase, MEDLINE, PubMed, PubMed Central, and Science Citations Index Expanded.
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