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The pathogenicity and regulatory function of temperature-sensitive proteins PscTSP in Pseudofabraea citricarpa under high temperature stress

文献类型： 外文期刊

作者： Zhan, Shuang 1 ; Wu, Wang 1 ; Hu, Junhua 1 ; Liu, Fengjiao 1 ; Qiao, Xinghua 3 ; Chen, Li 3 ; Zhou, Yan 1 ;

作者机构： 1.Southwest Univ, Citrus Res Inst, Chinese Acad Agr Sci, Chongqing 400712, Peoples R China

2.Sci Observing & Expt Stn Fruit Tree Sci Southwest, Minist Agr, Chongqing 400712, Peoples R China

3.Wanzhou Dist Chongqing Plant Protect & Fruit Tree, Wanzhou 404000, Peoples R China

关键词： Citrus target spot; Pseudofabraea citricarpa; Temperature-sensitive protein; Pathogenicity

期刊名称：INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES （ 影响因子：7.7； 五年影响因子：7.7 ）

ISSN： 0141-8130

年卷期： 2024 年 270 卷

页码：

收录情况： SCI

摘要： Citrus fruit rich in beneficial health -promoting nutrients used for functional foods or dietary supplements production. However, its quality and yield were damaged by citrus target spot. Citrus target spot is a lowtemperature fungal disease caused by Pseudofabraea citricarpa , resulting in citrus production reductions and economic losses. In this study, transcriptome and gene knockout mutant analyses were performed on the growth and pathogenicity of P. citricarpa under different temperature conditions to quantify the functions of temperature -sensitive proteins (PscTSP). The optimum growth temperature for P. citricarpa strain WZ1 was 20 degrees C, while it inhibited or stopped growth above 30 degrees C and stopped growth below 4 degrees C or above 30 degrees C. Certain PscTSP-key genes of P. citricarpa were identified under high temperature stress. qRT-PCR analysis confirmed the expression levels of PscTSPs under high temperature stress. PscTSPs were limited by temperature and deletion of the PscTSP - X gene leads to changes in the integrity of citrus cell walls, osmotic regulation, oxidative stress response, calcium regulation, chitin synthesis, and the pathogenicity of P. citricarpa . These results provide insight into the underlying mechanisms of temperature sensitivity and pathogenicity in P. citricarpa , providing a foundation for developing resistance strategies against citrus target spot disease.

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