Cooperative interactions between seed-borne bacterial and air-borne fungal pathogens on rice

Boknam Jung, Jungwook Park, Namgyu Kim, Taiying Li, Soyeon Kim, Laura E. Bartley, Jinnyun Kim, Inyoung Kim, Yoonhee Kang, Kihoon Yun, Younghae Choi, Hyun-Hee Lee, Sungyeon Ji, Kwang Sik Lee, Bo Yeon Kim, Jong Cheol Shon, Won Cheol Kim, Kwang-Hyeon Liu, Dahye Yoon, Suhkman Kim, Young-Su Seo () and Jungkwan Lee ()
Additional contact information
Boknam Jung: Dong-A University
Jungwook Park: Pusan National University
Namgyu Kim: Pusan National University
Taiying Li: Dong-A University
Soyeon Kim: Dong-A University
Laura E. Bartley: University of Oklahoma
Jinnyun Kim: Pusan National University
Inyoung Kim: Pusan National University
Yoonhee Kang: Dong-A University
Kihoon Yun: Dong-A University
Younghae Choi: Dong-A University
Hyun-Hee Lee: Pusan National University
Sungyeon Ji: Dong-A University
Kwang Sik Lee: Dong-A University
Bo Yeon Kim: Dong-A University
Jong Cheol Shon: Kyungpook National University
Won Cheol Kim: Kyungpook National University
Kwang-Hyeon Liu: Kyungpook National University
Dahye Yoon: Pusan National University
Suhkman Kim: Pusan National University
Young-Su Seo: Pusan National University
Jungkwan Lee: Dong-A University

Nature Communications, 2018, vol. 9, issue 1, 1-11

Abstract: Abstract Bacterial-fungal interactions are widely found in distinct environments and contribute to ecosystem processes. Previous studies of these interactions have mostly been performed in soil, and only limited studies of aerial plant tissues have been conducted. Here we show that a seed-borne plant pathogenic bacterium, Burkholderia glumae (Bg), and an air-borne plant pathogenic fungus, Fusarium graminearum (Fg), interact to promote bacterial survival, bacterial and fungal dispersal, and disease progression on rice plants, despite the production of antifungal toxoflavin by Bg. We perform assays of toxoflavin sensitivity, RNA-seq analyses, lipid staining and measures of triacylglyceride content to show that triacylglycerides containing linolenic acid mediate resistance to reactive oxygen species that are generated in response to toxoflavin in Fg. As a result, Bg is able to physically attach to Fg to achieve rapid and expansive dispersal to enhance disease severity.

Date: 2018
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DOI: 10.1038/s41467-017-02430-2

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