Anastomosis Groups and Pathogenicity of Rhizoctonia solani from Potato in Inner Mongolia

Cao Chunmei; Wang Xiaojiao; Xu Fei; Lu Chunxing

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Anastomosis Groups and Pathogenicity of Rhizoctonia solani from Potato in Inner Mongolia

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A total of 148 samples of potato black scurf were collected from 15 potato producing counties in Inner Mongolia Autonomous Region of China,and the strains were identified to be Rhizoctonia solani.The collected R.solani strains were grouped into three types,fast growth,slow growth and medium growth,based on the mycelial growth rate.Most of the fungi isolated were of fast and medium growth types.To examine the anastomosis groups of isolated R.solani strains,the isolated strains were co-cultured with anastomosis standard strains on sterile slide glass,and the occurrence of mycelial fusion was observed under microscope.The examination results indicated that 45 strains(73.77%),four strains(6.56%),and three strains(4.92%)belonged to AG-3,AG-1-IB and AG-2 anastomosis groups,respectively,while nine strains(14.75%)did not belong to any anastomosis groups above.These results suggested that the dominant strains causing potato black scurf in Inner Mongolia Autonomous Region were mainly R.solani AG-3.To test the pathogenicity of different anastomosis groups of R.solani,the potato tubers were planted with soil infected by isolated fungi.The results showed that all the tested fungi were able to cause typical symptoms of potato black scurf on tubers and stalk,but their pathogenicity levels varied.Moreover,it was found that the mycelial growth rate was positively correlated with their pathogenicity.

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《植物病虫害研究：英文版》 |2019年第1期|P.18-23|共6页
作者
Cao Chunmei; Wang Xiaojiao; Xu Fei; Lu Chunxing;
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作者单位

[1]Inner Mongolia Academy of Agricultural and Animal Husbandry Sciences;

Hohhot 010031;

China;

[1]Inner Mongolia Academy of Agricultural and Animal Husbandry Sciences;

Hohhot 010031;

China;

[2]Inner Mongolia Agricultural University;

Hohhot 010018;

China;

[1]Inner Mongolia Academy of Agricultural and Animal Husbandry Sciences;

Hohhot 010031;

China;

[1]Inner Mongolia Academy of Agricultural and Animal Husbandry Sciences;

Hohhot 010031;

China;

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原文格式 PDF
正文语种 CHI
中图分类农业科学;
关键词
Rhizoctonia solani; Mycelial growth rate; Anastomosis group; Pathogenicity;

机译：茄根枯菌;菌丝体生长速率;解剖组;致病性;

Anastomosis Groups and Pathogenicity of Rhizoctonia solani from Potato in Inner Mongolia

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