First report of Nigrospora lacticolonia causing leaf spot of Bougainvillea spectabilis in China
文献类型： 外文期刊
作者： Li, Min 1 ; Gao, Zhaoyin 1 ; Wang, Yi 3 ; Zhang, Wu 4 ; Yang, Jinyu 5 ; Gong, Deqiang 1 ; Ma, Yuxin 1 ; Li, Ye 1 ; Hu, Meijiao 1 ;
作者机构： 1.Chinese Acad Trop Agr Sci, Environm & Plant Protect Inst, Haikou 571101, Hainan, Peoples R China
2.Minist Agr & Rural Affairs, Key Lab Integrated Pest Management Trop Crops, Haikou 571101, Hainan, Peoples R China
3.Chinese Acad Trop Agr Sci, Coconut Res Inst, Wenchang 571339, Hainan, Peoples R China
4.Lingnan Normal Univ, Zhanjiang 524048, Guangdong, Peoples R China
5.Hainan Univ, Minist Educ, Key Lab Green Prevent & Control Trop Plant Dis &, Sch Plant Protect, Haikou 571101, Hainan, Peoples R China
关键词： Bougainvillea spectabilis; leaf spot; morphological characteristics; Nigrospora lacticolonia; phylogenetic analysis
期刊名称：CANADIAN JOURNAL OF PLANT PATHOLOGY （ 影响因子：2.074； 五年影响因子：2.057 ）
ISSN： 0706-0661
年卷期：
页码：
收录情况： SCI
摘要： Bougainvillea spectabilis is an ornamental shrubby vine widely distributed in tropical and subtropical regions of China. In September 2020, a leaf spot of B. spectabilis was observed on Yongxing Island of Sansha City, Hainan Province. At a disease incidence of >30%, this leaf spot seriously reduced the ornamental value of affected plants. The typical symptoms included lesions consisting of circular or subcircular, grey pale centres with dark brown borders surrounded by diffused yellow margins. Fungal cultures isolated from colonies growing from surface-sterilized leaf tissues on potato dextrose agar exhibited similar morphological characteristics. The fungus was identified as Nigrospora lacticolonia based on its morphological characteristics and phylogenetic analysis using the internal transcribed spacer (ITS) region of rDNA, beta-tubulin (TUB2) and translation elongation factor 1-alpha (TEF1-alpha) gene sequences. Pathogenicity tests showed that the fungus could infect B. spectabilis, and it was successfully re-isolated from inoculated leaf tissues, fulfiling Koch's postulates. This is the first report of N. lacticolonia causing leaf spot on B. spectabilis.
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