Identification and functional analysis of glyoxal oxidase gene from rubber tree anthracnose
文献类型： 外文期刊
作者： Xian, Xuemei 1 ; Li, Kunmeng 4 ; Liu, Hui 3 ; Wang, Zhenhui 3 ; Yuan, Kun 3 ; Hu, Yiyu 3 ; Feng, Chengtian 3 ; Wang, Meng 1 ; Lin, Chunhua 1 ; He, Qiguang 3 ; Zhang, Yu 1 ;
作者机构： 1.Hainan Univ, Sanya Nanfan Res Inst, Coll Plant Protect, Sanya, Peoples R China
2.Hainan Univ, Sanya Nanfan Res Inst, Coll Plant Protect, Haikou, Peoples R China
3.Chinese Acad Trop Agr Sci, Rubber Res Inst, Hainan Key Lab Cultivat & Physiol,Minist Agr & Rur, Key Lab Biol & Genet Resources Rubber Tree, Haikou, Peoples R China
4.Yunnan Agr Univ, Coll Trop Crops, Puer, Peoples R China
关键词： glyoxal oxidase; Colletotrichum siamense; pathogenicity; stress responses; pathogenic mechanism
期刊名称：PLANT PROTECTION SCIENCE （ 影响因子：1.3； 五年影响因子：1.5 ）
ISSN： 1212-2580
年卷期： 2023 年
页码：
收录情况： SCI
摘要： Glyoxal oxidase (GLOX, EC 1.2.3.15) is a class of hydrogen peroxide synthases involved in lignin degradation. Several GLOX genes of biotrophic and necrotrophic phytopathogenic fungi have been confirmed to contribute to fungal growth, development, and pathogenicity. However, the composition, sequence characteristics and functions of genes in the GLOX family of hemi-biotrophic phytopathogenic fungi remain poorly understood. This study identified a GLOX-encodinggene CsGLOX in the hemi-biotrophic phytopathogenic fungus Colletotrichum siamense by bioinformatics analysis and PCR cloning. The encoded protein contains a signal peptide and five cell wall stress-responsive component (WSC) domains at the N terminus, followed by a catalytic structural domain (AA5_1). CsGLOX-deficient mutants were constructed by homologous replacement, which significantly increased the formation of conidia and reduced the pathogenicity and the high-osmotic stress tolerance of the fungus. However, the deletions did not influence fungal filamentous growth. This study proposes that the CsGLOX gene is involved in pathogen conidial formation, pathogenicity, and osmotic stress response, which deepens our understanding of the pathogenic mechanism of hemi-biotrophic phytopathogenic fungus C. siamense.
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