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Naringenin restricts the colonization and growth of Ralstonia solanacearum in tobacco mutant KCB-1

文献类型： 外文期刊

作者： Shi, Haoqi 1 ; Jiang, Jiale 1 ; Yu, Wen 3 ; Cheng, Yazhi 3 ; Wu, Shengxin 3 ; Zong, Hao 4 ; Wang, Xiaoqiang 5 ; Ding, Anming 1 ; Wang, Weifeng 1 ; Sun, Yuhe 1 ;

作者机构： 1.Chinese Acad Agr Sci, Tobacco Res Inst, Key Lab Tobacco Gene Resources, Qingdao 266101, Peoples R China

2.Chinese Acad Agr Sci, Grad Sch, Beijing 100081, Peoples R China

3.Fujian Inst Tobacco Agr Sci, Fuzhou 350003, Peoples R China

4.Shandong Linyi Tobacco Co Ltd, Linyi 276000, Peoples R China

5.Chinese Acad Agr Sci, Tobacco Res Inst, Qingdao 266101, Peoples R China

期刊名称：PLANT PHYSIOLOGY （ 影响因子：7.4； 五年影响因子：8.7 ）

ISSN： 0032-0889

年卷期： 2024 年

页码：

收录情况： SCI

摘要： Bacterial wilt severely jeopardizes plant growth and causes enormous economic loss in the production of many crops, including tobacco (Nicotiana tabacum). Here, we first demonstrated that the roots of bacterial wilt-resistant tobacco mutant KCB-1 can limit the growth and reproduction of Ralstonia solanacearum. Secondly, we demonstrated that KCB-1 specifically induced an upregulation of naringenin content in root metabolites and root secretions. Further experiments showed that naringenin can disrupt the structure of R. solanacearum, inhibit the growth and reproduction of R. solanacearum, and exert a controlling effect on bacterial wilt. Exogenous naringenin application activated the resistance response in tobacco by inducing the burst of reactive oxygen species and salicylic acid deposition, leading to transcriptional reprogramming in tobacco roots. Additionally, both external application of naringenin in CB-1 and overexpression of the Nicotiana tabacum chalcone isomerase (NtCHI) gene, which regulates naringenin biosynthesis, in CB-1 resulted in a higher complexity of their inter-root bacterial communities than in untreated CB-1. Further analysis showed that naringenin could be used as a marker for resistant tobacco. The present study provides a reference for analyzing the resistance mechanism of bacterial wilt-resistant tobacco and controlling tobacco bacterial wilt. Bacterial wilt-resistant mutant KCB-1 restricts colonization and growth of Ralstonia solanacearum by specifically inducing increased naringenin content.

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