CHARACTERIZATION OF POPULATIONS OF RHIZOCTONIA-SOLANI AG-3 FROM POTATO AND TOBACCO
CHARACTERIZATION OF POPULATIONS OF RHIZOCTONIA-SOLANI AG-3 FROM POTATO AND TOBACCO
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DOI：
10.1094/phyto-83-854
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发表时间：
1993-08-01
期刊：
影响因子：
3.2
通讯作者：
CARLING, DE
中科院分区：
文献类型：
--
作者：
JOHNK, JS;JONES, RK;CARLING, DE
历史上，立枯丝核菌吻合群3（AG-3）被认为是由引起马铃薯黑星病的菌株组成的寄主特异性菌株。近年来，分离到的R.据报道，Solani AG-3在南非造成烟草目标斑点。在美国，引起烟草靶斑病的分离物被鉴定为AG-2-2。吻合试验表明，分离的R.来自北卡罗来纳州病害烟草的solani属于AG-3。此外，烟草分离物，如来自马铃薯的AG-3，是原养型的硫胺素，而AG-2-2的分离物是营养缺陷型的硫胺素。基于细胞脂肪酸的聚类分析和主成分分析表明，烟草AG-3菌株与马铃薯AG-3菌株存在明显的差异。来自烟草的分离物具有统一的文化外观，而来自马铃薯的分离物显示出文化变异。分离到R.马铃薯Solani对烟草无致病性，烟草分离物对马铃薯无致病性。
Historically, Rhizoctonia solani anastomosis group 3 (AG-3) was regarded, as host specific, composed of isolates causing black scurf of potato. Recently, isolates of R. solani AG-3 were reported causing target spot of tobacco in South Africa. In the United States, isolates causing target spot of tobacco were identified as AG-2-2. Our anastomosis tests indicated that isolates of R. solani from diseased tobacco in North Carolina belong to AG-3. Furthermore, the tobacco isolates, like AG-3 from potato, were prototrophic for thiamine, whereas isolates of AG-2-2 were auxotrophic for thiamine. Cluster and principal component analyses based on cellular fatty acids indicated that AG-3 isolates from tobacco were distinct from AG-3 isolates from potato. Isolates from tobacco had uniform cultural appearance, whereas isolates from potato showed cultural variation. Isolates of R. solani from potato were not pathogenic on tobacco plants, and isolates from tobacco were not pathogenic on potato plants.