文献类型： 外文期刊
作者： Zhang, Hao 1 ; Zhao, Mei 3 ; Cai, Lulu 4 ; Guan, Wei 2 ; Yang, Yuwen 2 ; Walcott, Ron 5 ; Zhao, Wenjun 4 ; Zhao, Tingchang 2 ;
作者机构： 1.Jilin Agr Univ, Coll Plant Protect, Changchun 130118, Peoples R China
2.Chinese Acad Agr Sci, Inst Plant Protect, Beijing 100193, Peoples R China
3.China Agr Univ, Coll Plant Protect, Dept Plant Pathol, Beijing 100193, Peoples R China
4.Chinese Acad Inspect & Quarantine, Ctr Biosafety, Sanya 572024, Peoples R China
5.Univ Georgia, Dept Plant Pathol, Athens, GA 30602 USA
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 7 期
页码：
收录情况： SCI
摘要： Bacterial fruit blotch (BFB) is a highly destructive seed-borne and seed-transmitted disease caused by the Gram-negative bacterium Acidovorax citrulli that has caused substantial economic losses for the cucurbit industry in China. Despite its potential for economic damage, little is known about the bacterium's molecular mechanisms of pathogenicity. Toxin-antitoxin (TA) systems are critical for the bacterial stress response. These systems are composed of two genes, toxin and antitoxin, that encode a stable toxin protein and a labile antitoxin protein, respectively. In this study, the genes for the putative HipBA TA system were identified in A. citrulli genomes through bioinformatic analysis. A series of molecular biology experiments have demonstrated that the HipBA TA system exists in A. citrulli Aac5. Furthermore, the transcription of hipA and hipB in A. citrulli Aac5 were induced by pH stress, chloramphenicol stress, and during plant infection. Overall, our results have revealed an active type II TA system, HipBA, in A. citrulli Aac5, and provided insights into its biological functions. These findings contribute to a better understanding of TA systems in plant pathogens.
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