Protorhabditis nematodes and pathogen-antagonistic bacteria interactively promote plant health.

IF 13.8 1区生物学 Q1 MICROBIOLOGY

Microbiome Pub Date : 2024-10-28 DOI:10.1186/s40168-024-01947-1

Xu Xu, Renqiang Jiang, Xinling Wang, Shanshan Liu, Menghui Dong, Hancheng Mao, Xingrui Li, Ziyu Ni, Nana Lv, Xuhui Deng, Wu Xiong, Chengyuan Tao, Rong Li, Qirong Shen, Stefan Geisen

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引用次数: 0

Abstract

Background: Fertilization practices control bacterial wilt-causing Ralstonia solanacearum by shaping the soil microbiome. This microbiome is the start of food webs, in which nematodes act as major microbiome predators. However, the multitrophic links between nematodes and the performance of R. solanacearum and plant health, and how these links are affected by fertilization practices, remain unknown.

Results: Here, we performed a field experiment under no-, chemical-, and bio-organic-fertilization regimes to investigate the potential role of nematodes in suppressing tomato bacterial wilt. We found that bio-organic fertilizers changed nematode community composition and increased abundances of bacterivorous nematodes (e.g., Protorhabditis spp.). We also observed that pathogen-antagonistic bacteria, such as Bacillus spp., positively correlated with abundances of bacterivorous nematodes. In subsequent laboratory and greenhouse experiments, we demonstrated that bacterivorous nematodes preferentially preyed on non-pathogen-antagonistic bacteria over Bacillus. These changes increased the performance of pathogen-antagonistic bacteria that subsequently suppressed R. solanacearum.

Conclusions: Overall, bacterivorous nematodes can reduce the abundance of plant pathogens, which might provide a novel protection strategy to promote plant health. Video Abstract.

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原生线虫和病原体拮抗细菌相互作用，促进植物健康。

背景：施肥方法通过塑造土壤微生物群来控制导致细菌枯萎病的 Ralstonia solanacearum。该微生物群是食物网的起点，其中线虫是微生物群的主要捕食者。然而，线虫与 R. solanacearum 的表现和植物健康之间的多营养联系，以及这些联系如何受到施肥方法的影响，仍是未知数：结果：在此，我们进行了一项田间试验，研究线虫在抑制番茄细菌性萎蔫病中的潜在作用。我们发现，生物有机肥改变了线虫群落的组成，增加了食菌线虫（如原生线虫）的数量。我们还观察到，病原拮抗细菌（如芽孢杆菌）与食菌线虫的数量呈正相关。在随后的实验室和温室实验中，我们证明细菌线虫优先捕食非病原拮抗细菌，而不是芽孢杆菌。这些变化提高了病原拮抗细菌的性能，从而抑制了茄碱菌：总之，食菌线虫可以减少植物病原体的数量，这可能为促进植物健康提供了一种新的保护策略。视频摘要

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来源期刊

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.