姚权,郭源,魏丰园,李司政,张盛培,李河

• 1:中南林业科技大学南方人工林病虫害防控国家林草局重点实验室森林有害生物防控湖南省重点实验室经济林培育与保护教育部重点实验室

摘要(Abstract)：

油茶炭疽病是油茶Camellia oleifera上最重要病害之一,引起该病害的主要致病菌为果生刺盘孢菌Colletotrichum fructicola。本研究以果生刺盘孢菌bZIP类转录因子CfHac1为研究对象,研究其在果生刺盘孢菌的营养生长、产孢量、附着胞形成、致病力及耐受性等方面的生物学功能,为油茶炭疽病的防控提供理论依据。研究结果表明,果生刺盘孢菌中具有一个与灰色大角间座壳(稻瘟菌)bZIP转录因子MoHac1直系同源的基因,命名为CfHAC1。该基因全长1627bp,编码526个氨基酸,该蛋白含有一个碱性亮氨酸链(bZIP)结构域和3个未知功能结构域。CfHAC1基因敲除突变体的菌丝生长速度显著变慢,分生孢子产量显著减少且不能正常形成附着胞,并对山梨糖醇和KCl渗透压胁迫敏感性增加;致病力测试结果表明,果生刺盘孢菌基因敲除突变体ΔCfhac1对油茶的致病力显著下降。转录因子CfHac1参与调控果生刺盘孢菌的生长、产孢、附着胞的形成、致病力以及响应外界渗透压胁迫过程。

关键词(KeyWords)： 油茶;果生刺盘孢菌;CfHac1;致病力

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(31570641)~~

作者(Author): 姚权,郭源,魏丰园,李司政,张盛培,李河

DOI: 10.13346/j.mycosystema.190228

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