四川农业大学学报 ›› 1994, Vol. 12 ›› Issue (03): 364-369.doi: 10.16036/j.issn.1000-2650.1994.03.006

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西南地区立枯丝核菌菌丝融合群及其生态学研究

陶家凤, 张敏, 文成敬   

  1. 四川农业大学水稻研究所
  • 收稿日期:1994-01-12 出版日期:1994-09-30 发布日期:2017-04-22
  • 基金资助:
    国家自然科学基金资助项目

ANASTOMOSIS GROUPS OF RHIZOCTONIA SOLANI AND THEIR ECOLOGY IN SOUTHWEST CHINA

Tao Jiafeng, et al   

  1. Rice Research Institute, Sichuan Agricultural University, Yaan, Sichuan, China 625014
  • Received:1994-01-12 Online:1994-09-30 Published:2017-04-22

摘要: 从川、滇、黔、藏的代表地区,采集植物及土壤样品812份,分离出具丝核菌特征的菌株361株。根据菌丝细胞宽度,细胞核数目等,鉴定出立枯丝核菌(Rhizoctonia solaniKühn)229株,双核丝核菌132株。将立枯丝核菌分离菌与已知融合群菌株分别配对进行菌丝融合试验,结果有207株分属于AG-1,AG-2,AG-3,AG-4,AG-5,AG-6,AG-77个菌丝融合群。其中AG-4频率最高(67.7),AG-1次之(22.7)。AG-6,AG-7为我国首次记录。还有22株不与现有已和融合群发生融合。立枯丝核菌在西南地区地理分布很广,寄主或基物种类多。在海拔300-3760m的高度范围及pH5-8的土壤中都有发现,但在300-1000m的高度,pH6-7.5及0-10cm的土壤中分布更丰富。季节变化对土壤中主要融合群的分布无显著影响。

关键词: 菌丝融合群, 生态学, 立枯丝核菌, 丝核菌病, 土壤真菌

Abstract: Two hundred and seven isolates of Rhizoctonia solani Kuhn (Thanatephorus cucumeris (Frank) Donk) were obtained from 812 diseased plants and soil samples collected from Sichuan, Guizhou, Yunan and Tibet.Intraspecific groups were identified by hyphal fusion with representative strains of known anastomosis groups (AGs, testers).Seven AGs, i.e, AG-1, AG-2, AG-3, AG-4, AG-5, AG-6, AG-7 were identified.AG-4 is the major group (frequency:67.7%) and AG-1(22.7%) follows.AG-6 and AG-7 are reported for the first time in China.The ecology of these AGs in southwest China has been studied.The results show that the fungus is widely distributed and has a wide host range.The AGs in soil are most preferable at pH 6.0-7.5 in a depth of 0-10cm.The seasonal variation of main AGs seems inconspicuous.

Key words: ANASTOMOSIS GROUP, ECOLOGY, RHIZOCTIONIA SOLANI, RHIZOCTONIA DISEASE, SOIL FUNGI

中图分类号: 

  • S432.1