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ORIGINAL RESEARCH article

Front. Microbiol.
Sec. Microbial Symbioses
Volume 15 - 2024 | doi: 10.3389/fmicb.2024.1506059
This article is part of the Research Topic Plant Microbiome: Interactions, Mechanisms of Action, and Applications, Volume III View all 19 articles

Superiority of Native Seed Core Microbiomes in the Suppression of Bacterial Wilt Disease

Provisionally accepted
Yanling Dong Yanling Dong Jie Gong Jie Gong Qipeng Jiang Qipeng Jiang Jidan Zhang Jidan Zhang Ruiyu Yang Ruiyu Yang Yuhao Dai Yuhao Dai Yao Wang Yao Wang Shili Li Shili Li Wei Ding Wei Ding *
  • Southwest University, Chongqing, China

The final, formatted version of the article will be published soon.

    Native endophytic microorganisms in tobacco seeds are closely related to their resistance to Ralstonia solanacearum (R. solanacearum) infections. However, the role of the native seed core microbiome in the suppression of bacterial wilt disease (BWD) remains underexplored. Here, the characteristics of endophytic bacterial communities in both resistant and susceptible tobacco varieties were characterized using high-throughput sequencing technology. Our findings identify Paenibacillus as a potential microbial antagonist against BWD based on its significantly greater presence in BWD-resistant tobacco varieties, with a relative abundance that was 83.10% greater in the seeds of resistant tobacco than in those of susceptible varieties. Furthermore, a Paenibacillus strain identified as Paenibacillus odorifer 6036-R2A-26 (P. odorifer 26) was isolated from the seeds of the resistant variety. Following irrigation treatment with P. odorifer 26, the BWD index was reduced by 51.08%.Additionally, this strain exhibited significant growth-promoting effects on tobacco. It significantly increased the fresh weight of the tobacco plants by 30.26% in terms of aboveground weight, 37.75% in terms of underground weight, and 33.97% in terms of aboveground dry weight. This study highlights the critical role of Paenibacillus in tobacco seeds in the suppression of BWD, which may result from its antagonistic and growth-promoting properties. Our research suggests that P. odorifer 26 is a promising biocontrol agent against R. solanacearum.

    Keywords: endophytic bacteria, Paenibacillus, Resistant varieties, Susceptible varieties, Tobacco bacterial wilt

    Received: 04 Oct 2024; Accepted: 09 Dec 2024.

    Copyright: © 2024 Dong, Gong, Jiang, Zhang, Yang, Dai, Wang, Li and Ding. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

    * Correspondence: Wei Ding, Southwest University, Chongqing, China

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