Hyun J-W, Timmer L W, Lee S-C, Yun S-H, Ko S-W, Kim K-S
Citrus Experiment Station, National Jeju Agricultural Experiment Station, Rural Development Administration, Jeju-Do, 699-803, Korea.
University of Florida, Citrus Research and Education Center, Lake Alfred 33850.
Plant Dis. 2001 Sep;85(9):1013-1017. doi: 10.1094/PDIS.2001.85.9.1013.
Two scab diseases are recognized currently on citrus: (i) citrus scab caused by Elsinoe fawcettii, which has several pathotypes; and (ii) sweet orange scab caused by E. australis. Pathogenicity and cultural characteristics among 36 isolates collected from Jeju Island were investigated. Of 30 isolates from satsuma mandarin, yuzu, and kinkoji, all were E. fawcettii; 27 were similar to the Florida broad host range pathotype and 3 were similar to the Florida narrow host range pathotype by inoculation of differential hosts. Six isolates from natsudaidai were nonpathogenic to satsuma mandarin, rough lemon, sour orange, grapefruit, cleopatra mandarin, and natsudaidai leaves, and were only pathogenic to natsudaidai fruit. Isolates from natsudaidai usually produced unique tomentose colonies on potato dextrose agar compared with isolates from other citrus species. The colonies were relatively fast growing, radially sulcate, larger, and more expansive than the gummy, mucoid colonies of other isolates. Isolates from Florida, Australia, Argentina, and Jeju Island (Korea) were genetically differentiated using random amplified polymorphic DNA markers. E. fawcettii from Korea, Florida, and Australia, E. australis from Argentina, and natsudaidai isolates clustered closely within groups, but were clearly distinguishable among groups.
（i）由柑橘痂圆孢菌引起的柑橘痂病，该菌有几种致病型；（ii）由南方痂圆孢菌引起的甜橙痂病。对从济州岛采集的36个分离株的致病性和培养特性进行了研究。在从温州蜜柑、柚子和枳橙上分离的30个分离株中，全部为柑橘痂圆孢菌；通过接种鉴别寄主，27个与佛罗里达广寄主范围致病型相似，3个与佛罗里达窄寄主范围致病型相似。从夏橙上分离的6个分离株对温州蜜柑、粗柠檬、酸橙、葡萄柚、埃及蜜柑和夏橙叶片无致病性，仅对夏橙果实致病。与从其他柑橘品种上分离的菌株相比，从夏橙上分离的菌株在马铃薯葡萄糖琼脂上通常产生独特的绒毛状菌落。这些菌落生长相对较快，呈放射状有沟纹，比其他分离株的粘性、粘液状菌落更大且更扩展。利用随机扩增多态性DNA标记对来自佛罗里达、澳大利亚、阿根廷和济州岛（韩国）的分离株进行了遗传分化研究。来自韩国、佛罗里达和澳大利亚的柑橘痂圆孢菌、来自阿根廷的南方痂圆孢菌以及夏橙分离株在组内紧密聚类，但在组间明显可区分。
