The Silencing of the StPAM16-1 Gene Enhanced the Resistance of Potato Plants to the Phytotoxin Thaxtomin A
文献类型： 外文期刊
作者： Liu, Lu 1 ; Song, Shuangwei 1 ; Liu, Ning 3 ; Wang, Zhiqin 1 ; Zhao, Yonglong 1 ; Zhong, Naiqin 1 ; Zhao, Pan 1 ; Wang, Haiyun 1 ;
作者机构： 1.Chinese Acad Sci, Inst Microbiol, State Key Lab Plant Genom, Beijing 100101, Peoples R China
2.Chinese Acad Sci, Engn Lab Adv Microbial Technol Agr, Beijing 100101, Peoples R China
3.Beijing Acad Agr & Forestry Sci, Beijing Vegetable Res Ctr BVRC, Beijing 100097, Peoples R China
4.Beijing Acad Agr & Forestry Sci, Natl Engn Res Ctr Vegetables NERCV, State Key Lab Vegetable Biobreeding, Beijing 100097, Peoples R China
5.Key Lab Potato Ind Integrat & Dev Enterprises Inne, Hulunbuir 021000, Peoples R China
关键词：
期刊名称：INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES （ 影响因子：4.9； 五年影响因子：5.7 ）
ISSN： 1661-6596
年卷期： 2025 年 26 卷 3 期
页码：
收录情况： SCI
摘要： Potato common scab (CS) caused by Streptomyces scabiei is a severe disease that threatens tuber quality and its market value. To date, little is known about the mechanism regulating the resistance of potato to CS. In this study, we identified a presequence translocase-associated motor 16 gene from potato (designated StPAM16-1) that is involved in the response to the phytotoxin thaxtomin A (TA) secreted by S. scabiei. The StPAM16-1 protein was localized in the mitochondria, and the expression of the gene was upregulated in potato leaves treated with TA. The suppression of StPAM16-1 in potato led to enhanced resistance to TA and S. scabiei. Protein interaction analyses revealed that StPAM16-1 interacted with the subunit 5b of the COP9 signalosome complex (StCSN5). Similar to that of StPAM16-1, the expression levels of StCSN5 significantly increased in potato leaves treated with TA. These results indicated that StPAM16-1 acted as a negative regulator and was functionally associated with StCSN5 in the immune response of potato plants against CS. Our study sheds light on the molecular mechanism by which PAM16 participates in the plant immune response. Furthermore, both StPAM16-1 and StCSN5 could be potential target genes in the molecular breeding of potato cultivars with increased resistance to CS.
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