Taxonomic Studies on the Streptomyces Species, Isolated as Causal Organisms of Potato Common Scab
نویسندگان
چکیده
Taxonomic studies were made on Streptomyces species, causal organisms of potato common scab, isolated from lesions of potato tubers and sugar beet roots in Japan. They were divided into two groups based on the spore chain morphology: spiral spore chain isolates (SI) group and rectiflexible spore chain isolates (RFI) one. Although the two groups did not significanlty differ each other in their physiological and biochemical characteristics, DNA homology study further divided them into four distinct groups: SI from potato, RFI from potato, SI from sugar beet, and RFI from sugar beet. Because of the low DNA homology values among the four groups, they should be considered as separate species. Present study confirm that the potato common scab is caused by at least four genetically distinct species of Streptomyces. (Received September 27, 1989)
منابع مشابه
Genetic Diversity among Plant Pathogenic Streptomyces Strains from Potato Fields in Northwest of Iran
Different species of Streptomyces are common in most types of soil. Some certain species are plant pathogenic especially on potato. This study was conducted to evaluate genetic diversity among some local Streptomyces spp. strains isolated from soil and infected tubers in potato farms in northwest of Iran. Repetitive DNA elements (BOX, ERIC and REP) as genetic markers were used for diversity stu...
متن کاملDraft Genome Sequences of Streptomyces scabiei S58, Streptomyces turgidiscabies T45, and Streptomyces acidiscabies a10, the Pathogens of Potato Common Scab, Isolated in Japan
The draft genome sequences of the three pathogens of potato common scab, Streptomyces scabiei S58, Streptomyces turgidiscabies T45, and Streptomyces acidiscabies a10, isolated in Japan, are presented here. The genome size of each strain is >10 Mb, and the three pathogenic strains share genes located in a pathogenicity island previously described in other pathogenic Streptomyces species.
متن کاملDiversity of Streptomyces strains causing potato scab disease in Hamedan province and their thaxtomin production potential
Hamedan province is one of the main potato growing areas in Iran. Potaoto scab disease caused by Streptomyces spp. is one of the prevalent and important diseases of potato in this provice. Potato tubers with symptoms of scab diseases including raised and deep or shallow pitted lesion were collected from potato growing area in this region. A total of 20 and 25 strains of Streptomyces were isolat...
متن کاملA survey of genetic variation in streptomyces isolates causing potato common scab in the United States.
ABSTRACT Common scab is a serious disease of potatoes and other root and tuber crops, affecting crop quality and market value. The disease is caused by gram positive soil bacteria in the genus Streptomyces. Disease incidence and severity vary in different locations and years; this is due in part to variation in the environment (weather) and genetic variation in potato cultivars. Little informat...
متن کاملHigh proportions of nonpathogenic Streptomyces are associated with common scab-resistant potato lines and less severe disease.
Streptomyces isolates were obtained from potato tubers with common scab lesions from 2 fields over a 3 year period in Minnesota and a 5 year period in Maine. Isolates were obtained from different potato cultivars or breeding lines and types of scab lesions. A majority of isolates could be classified as putative pathogens based on the presence of genes for biosynthesis of the pathogenicity deter...
متن کامل