Scientia Agricultura Sinica ›› 2006, Vol. 39 ›› Issue (02): 313-318 .

• PLANT PROTECTION • Previous Articles     Next Articles

Characterization and Identification on the Pathogen of Potato Scab in China

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  1. 河北农业大学植物病理系
  • Received:2004-10-28 Revised:1900-01-01 Online:2006-02-10 Published:2006-02-10

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Abstract: 【Objective】The pathogens causing potato scab in ten provinces in China were identified.【Method】 The scab-related strains were analyzed according to the biological characteristics and the 16S rDNA sequences. 【Result】The Streptomyces scabies strains from China have the same 16S rDNA sequences to standard S. scabies strain ATCC 49173 from America. But their biological characteristics are different. Chinese Streptomyces scabies strains can not use D-mannitol as single carbon sources, unsensitive to penicillin G (10 IU·ml-1) and produce the H2S. The 16S rDNA sequences of Chinese S. acidiscabies strains are similar to standard S. acidiscabies one ATCC 49003(99.8%). It can use raffinose as single carbon source, sensitive to phenol (0.1%) and crystal violet (0.5 ?g ml-1), and can not produce the H2S. A novel scab-related Streptomyces specie was found in this work.【Conclusion】The results showed that the pathogens causing potato scab in China were belong to Streptomyces scabies, S. acidiscabies and a novel Streptomyces species respectively.

Key words: Potato scab, Streptomyces, Biological characteristic, 16S rDNA sequence, Identification

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