核桃黑斑病病原菌的生物学特性研究  

Study on Biological Characteristics of Walnut Black Spot Pathogen

作　　者：席军强 吕娥娥 李建龙 刘文强 冯华 Xi Junqiang;Lv Ee;Li Jianlong;Liu Wenqiang;Feng Hua(Guanshan Forestry Administration of Pingliang City,Pingliang 744000,Gansu;People's Government of Jingning Hongsi Town,Pingliang 743400,Gansu;People's Government of Jingning Weirong Town,Pingliang 743400,Gansu)

机构地区：[1]甘肃省平凉市关山林业管理局,甘肃平凉744000 [2]甘肃省静宁县红寺镇人民政府,甘肃平凉743400 [3]甘肃省静宁县威戎镇人民政府,甘肃平凉743400

出　　处：《防护林科技》2022年第4期55-57,共3页Protection Forest Science and Technology

摘　　要：核桃黑斑病是由黄单孢杆菌属的核桃黄极毛杆菌(Xanthomonas campestris pv.juglandis)和链格孢菌(Alternaria alternata)复合侵染发生的病害。为控制该病害的危害,以核桃黑斑病叶分离的主要病原物链格孢菌为研究对象,采用菌丝生长速率法和培养皿玻片法,研究了不同环境条件对链格孢菌的菌丝生长及孢子萌发的影响,结果表明:链格孢菌的菌丝生长和孢子萌发的适宜温度均为25~30℃;全光照下利于菌丝生长,全黑暗和光暗交替可促进孢子萌发;孢子萌发的适宜pH为7~9,pH为9时最适宜菌丝的生长。Walnut black spot disease is caused by the compound infection of Xanthomonas campestris pv.juglandis and Alternaria alternata.In order to provide the theoretical basis for control the disease,the characteristics of main pathogen A.alternata isolated from walnut leaf black spot was studied using the mycelium growth rate method and petri dish slide method to clarify the effects of different environmental conditions on pathogen mycelial growth and spore germination.The results showed that the optimum temperature for mycelial growth and spore germination was 25-30℃;full sunlight was beneficial to mycelial growth,alternating light and dark promoted spore germination;the optimum pH value for spore germination was pH7-9,the most suitable pH for mycelial growth was pH=9.

关 键 词：环境因素 链格孢菌 菌丝生长 孢子萌发 

分 类 号：S792.13[农业科学—林木遗传育种]