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琼中绿橙炭疽病病原菌基础生物学特性研究
作者: 郑肖兰1  2  3  吴伟怀1  2  3  李  锐1  刘笔灿4  贺春萍1  2  3 *  
单位: (1 中国热带农业科学院环境与植物保护研究所;2 农业部热带农林有害生物入侵监测与控制重点开放实验室;3 海南省热带农业有害生物检测监控重点实验室;4 海南大学环境与植物保护学院:海南儋州 571737)  
关键词: 绿橙  炭疽菌  病原鉴定  生物学特性  
分类号:S436.661.1+4
出版年,卷(期):页码:2011 ,42 ( 1 ): 页码:54-57
摘要:

【Objective】 The present study has been performed in order to identify the biological characteristics of pathogens causing anthracnose disease in green orange in some middle districts of Hainan Province. 【Method】 The pathogens have been isolated using monospore isolation method and their morphological and biological characteristics, and the pathogenicity were investigated. 【Result】 Five strains of the pathogens were obtained, amongst them the microspore size of strain CA5 was found to be 25-35 μm × 4-11 μm. The leaves of green orange showed brown spots within four days after inoculation with certain concentration of pathogen conidia suspension. The mycelium of pathogen was found to grow normally at 10-35℃, however, the optimum temperature was 28℃. The average daily growth rate of the mycelium was found fastest at pH 7, but the mycelium growth was significantly inhibited in conditions of pre-alkalanization. The light conditions had no significant effect on growth rate of the mycelium. The carbon and nitrogen resource in Czapek medium for mycelium growth was L-maltose, L-rhamnose and ammonium acetate and L-alanine, respectively. Galactose and L-leucine showed inhibitory effects on growth of the mycelium. The lethal temperature of spore was 46-50℃. 【Conclusion】 Pathogens causing anthracnose disease in green orange in some middle districts of Hainan Province belong to Colletotrichum(myceteae, eumycota, deuteromycotina, coelomycetes, melanconiales, Colletotrichum gloeosporioides). The results of our experiment will provide a scientific basis for forecasting and control of pathogens causing anthracnose disease in green orange producing areas.

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