Colletotrichum fructicola STE50 is required for vegetative growth, asexual reproduction, appressorium formation, pathogenicity and the response to external stress

被引：9
作者：
Chen, Yan-ying [1 ,2 ,3 ]
Liu, Jun-ang [1 ,2 ,3 ]
Jiang, Shi-qiang [1 ,2 ,3 ]
Li, He [1 ,2 ,3 ]
Zhou, Guo-ying [1 ,2 ,3 ]
机构：
[1] Cent South Univ Forestry & Technol, Key Lab Natl Forestry & Grassland Adm Control Art, Changsha 410004, Hunan, Peoples R China
[2] Cent South Univ Forestry & Technol, Hunan Prov Key Lab Control Forest Dis & Pests, Changsha 410004, Hunan, Peoples R China
[3] Cent South Univ Forestry & Technol, Key Lab Nonwood Forest Cultivat & Conservat Minis, Changsha 410004, Hunan, Peoples R China
来源：
JOURNAL OF PLANT PATHOLOGY | 2020年 / 102卷 / 02期
关键词：
Anthracnose; Gene function; Fungus pathogen; Tea oil camellia; MAP KINASE; SIGNALING PATHWAYS; GENE-EXPRESSION; PROTEIN; CASCADE; STE50; MST50;
D O I：
10.1007/s42161-019-00422-3
中图分类号：
Q94 [植物学];
学科分类号：
071001 ;
摘要：
Colletotrichum fructicola is a fungal pathogen that causes Camellia oleifera anthracnose. Mitogen-activated protein kinase cascade signaling regulates plants defenses and is modulated by Ste50, a scaffold protein that mediates the interaction of Ste11 and Ste7. In this study, the Saccharomyces cerevisiae STE50 homolog CfSTE50 in C. fructicola was identified and disrupted. CfSTE50 encodes a 482 amino acid protein. The mutants showed significant differences in conidial yields and appressorium failed to form. Vegetative growth also decreased compared to wild-type strains. Inoculation with conidial suspensions showed that the virulence of the mutant on wounded leaves was significantly impaired. Further analysis showed that the targeted deletion of CfSTE50 resulted in enhanced sensitivity to external peroxide stress, but reduced sensitivity to cell wall stress. These results provide evidence that CfSte50 regulates the growth and development of C. fructicola and regulates asexual reproduction, appressorium formation, pathogenicity and the response to external stresses.
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收藏
页码：335 / 342
页数：8
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