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Characterization of Rhizoctonia solani AG-3 Isolates Causing Target Spot of Flue-Cured Tobacco in China

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Abstract:

Rhizoctonia solani Kühn is the causal pathogen of tobacco target spot, a serious fungal disease of tobacco that severely impairs yield and quality in northeast China. The objective of this study was to characterize isolates of R. solani from tobacco in China. Among 58 Rhizoctonia isolates examined, all of them were multinucleate. Phylogenetic analyses and hyphal anastomosis criteria suggest that the isolates belonged to R. solani anastomosis group (AG) 3. Target spot isolates from Liaoning province formed a single phylogenetic group together with tomato isolates of R. solani AG-3 from Japan and are more closely related to R. solani AG-3 isolates in tomato and potato than that in tobacco from USA. Pathogenicity test for each isolates was fulfilled using a method of inoculating tobacco leaves from plants grown for 8 weeks (cv. NC89).

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Periodical:

Advanced Materials Research (Volumes 726-731)

Pages:

4321-4325

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.726-731.4321

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Online since:

August 2013

Authors:

Yan Qin Zhao*, Yuan Hua Wu, Ying Fu, Meng Nan An, Jian Guang Chen, Xiu Xiang Zhao

Keywords:

Hyphal Anastomosis, Rhizoctonia solani, Target Spot Disease of Tobacco

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© 2013 Trans Tech Publications Ltd. All Rights Reserved

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