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SstF, a novel sulforaphane-sensing transcription factor of Xanthomonas campestris, is required for sulforaphane tolerance and virulence

文献类型： 外文期刊

作者： Wang, Bo 1 ; Xu, Zhizhou 1 ; Zhao, Yangyang 1 ; Wu, Guichun 3 ; Li, Kaihuai 4 ; Hou, Rongxian 1 ; Guo, Baodian 1 ; Tang, Bao 1 ; Zhao, Yancun 1 ; Liu, Fengquan 1 ;

作者机构： 1.Jiangsu Acad Agr Sci, Inst Plant Protect, Jiangsu Key Lab Food Qual & Safety, State Key Lab Cultivat Base,Minist Sci & Technol, Nanjing, Peoples R China

2.Nanjing Agr Univ, Coll Plant Protect, Dept Plant Pathol, Nanjing, Peoples R China

3.Anhui Agr Univ, Sch Life Sci, Hefei, Peoples R China

4.Guizhou Univ, Coll Agr, Guiyang, Peoples R China

5.Jiangsu Acad Agr Sci, Inst Plant Protect, Jiangsu Key Lab Food Qual & Safety, State Key Lab Cultivat Base,Minist Sci & Technol, Nanjing 210014, Peoples R China

关键词： SstF; sulforaphane; transcription factor; virulence; Xanthomonas campestris

期刊名称：MOLECULAR PLANT PATHOLOGY （ 2022影响因子：4.9； 五年影响因子：5.9 ）

ISSN： 1464-6722

年卷期： 2023 年 24 卷 5 期

页码：

收录情况： SCI

摘要： Avoiding the host defence system is necessary for the survival of pathogens. However, the mechanisms by which pathogenic bacteria sense and resist host defence signals are still unknown. Sulforaphane (SFN) is a secondary metabolite of crucifers. It not only plays an important role in maintaining the local defence response but also directly inhibits the growth of some pathogens. In this study, we identified a key SFN tolerance-related gene, saxF, in Xanthomonas campestris pv. campestris (Xcc), the causal agent of black rot in crucifers. More interestingly, we found that the transcription of saxF was regulated by the novel transcription factor SFN-sensing transcription factor (SstF). As a LysR family transcription factor, SstF can sense SFN and regulate the expression of saxF cluster genes to increase SFN resistance by directly binding to the promoter of saxF. In addition, we found that SstF and saxF also play an important role in positively regulating the virulence of Xcc. Collectively, our results illustrate a previously unknown mechanism by which Xcc senses the host defence signal SFN and activates the expression of SFN tolerance-related genes to increase virulence. Therefore, this study provides a remarkable result; that is, during pathogen-plant co-evolution, new functions of existing scaffolds are activated, thus improving the proficiency of the pathogenic mechanism.

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