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砀山梨炭疽病病原鉴定及其抑菌药剂筛选
引用本文:吴良庆,朱立武,衡伟,叶振风,刘刚,史苏湘.砀山梨炭疽病病原鉴定及其抑菌药剂筛选[J].中国农业科学,2010,43(18):3750-3758.
作者姓名:吴良庆  朱立武  衡伟  叶振风  刘刚  史苏湘
作者单位:(安徽农业大学果树学重点实验室)
基金项目:国家公益性行业(农业)梨科研专项项目 
摘    要:【目的】明确近年来严重危害砀山梨的炭疽病病原菌种类,研究常用杀菌剂对致病菌菌丝生长、分生孢子萌发的抑制作用。【方法】对6个取自不同梨品种上的病果、病叶样本分别进行发病组织培养、单孢分离纯化,根据病原菌的形态特征和致病性,并结合其rDNA-ITS序列分析,进行病原菌种类鉴定。采用常用杀菌剂分别对病原菌菌丝和分生孢子进行处理,观测其化学抑制效果。【结果】从不同病斑上分离出了6个纯化菌株,其形态特征相同,且与已报道的炭疽病菌(Colletotrichum spp.)形态特征相似;用上述纯培养菌株接种于健康果实和叶片上,又引起与田间原标本相同的病害症状;通过病原菌rDNA-ITS克隆测序、BLASTn比对分析,6个菌株为同一致病菌,且该致病菌与台湾枣(Taiwan jujube)炭疽菌株(Colletotrichum sp.EXMQ-1;登录号FJ233185)、日本超市水果(Japanese fruit)炭疽菌株(Glomerella cingulata;登录号AB219012)和凤梨草莓(Fragaria ananassa)炭疽菌株(C.gloeosporioides;登录号EU200455)的rDNA-ITS序列一致;430g·L-1戊唑醇水悬浮剂等7种杀菌剂对病原菌菌丝生长抑制率达100%;70%代森锰锌可湿性粉剂等8种药剂处理,病原菌分生孢子萌发率为0。【结论】危害砀山梨的炭疽病病原菌为半知菌亚门刺盘孢属的胶胞炭疽菌(Colletotrichum gloeosporioides),其有性阶段为围小丛壳(Glomerella cingulata)。常用药剂对该菌菌丝和分生孢子的抑制作用存在着显著的差异。

关 键 词:砀山梨  炭疽病  核糖体DNA转录间隔区  抑菌药剂
收稿时间:2010-03-01;

Identification of Dangshan Pear Anthracnose Pathogen and Screening Fungicides Against It
WU Liang-qing,ZHU Li-wu,HENG Wei,YE Zhen-feng,LIU Gang,SHI Su-xiang.Identification of Dangshan Pear Anthracnose Pathogen and Screening Fungicides Against It[J].Scientia Agricultura Sinica,2010,43(18):3750-3758.
Authors:WU Liang-qing  ZHU Li-wu  HENG Wei  YE Zhen-feng  LIU Gang  SHI Su-xiang
Institution:WU Liang-qing,ZHU Li-wu,HENG Wei,YE Zhen-feng,LIU Gang,SHI Su-xiang(Key Laboratory of Pomology,Anhui Agricultural University,Hefei 230036)
Abstract:Objective To identify the pathogenic fungus of a serious disease,which had caused a severe damage to pear in Dangshan County,Anhui Province in recent years and screen out effective chemical for inhibition of its mycelium growth and conidiophores germination.Method Isolates from diseased fruits and leaves which were collected from different pear varieties in the field were cultured on PDA medium and purified by single spore culture,respectively.Identification of the pathogenic fungus was carried out accordin...
Keywords:Dangshan pear  anthracnose  rDNA-ITS  screening fungicides  
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