Kreuze, Jan
- Department of Plant Biology, Swedish University of Agricultural Sciences
- International Potato Center (CIP)
Abstract
Streptomyces spp. are a highly diverse group of bacteria most of which are soil-inhabiting saprophytes. A few are plant pathogens that produce a family of phytotoxins called thaxtomins and cause significant economic losses, e.g., by reducing the marketability of potato tubers (Solanum tuberosum). In northern Europe, S. scabies, S. turgidiscabies and S. europaeiscabiei are the most common plant pathogenic species. In this study, a Streptomyces strain isolated from a netted scab lesion on a tuber of potato cv. Bintje in northern Sweden was identified as S. turgidiscabies but was found to differ in the genomic region carrying genes required for thaxtomin biosynthesis. Our results showed that the strain did not produce thaxtomin but rather phytotoxin fridamycin E, which is an anthraquinone novel to plant pathogenic Streptomyces spp. Fridamycin E was shown to reduce or inhibit sprouting of potato microtubers in vitro. While fridamycin E is known to have antibiotic activity against Gram-positive bacteria, the inhibitory activity of fridamycin E on plant growth is a novel finding.
Keywords
Netted scab; Potato; Streptomyces turgidiscabies; Streptomyces reticuliscabiei; Fridamycin E; Phytotoxin
Published in
Journal of General Plant Pathology
2018, volume: 84, number: 2, pages: 108-117
Publisher: SPRINGER JAPAN KK
SLU Authors
Valkonen, Jari
- Department of Plant Biology, Swedish University of Agricultural Sciences
- University of Helsinki
- Department of Plant Biology, Swedish University of Agricultural Sciences
UKÄ Subject classification
Agricultural Science
Publication identifier
- DOI: https://doi.org/10.1007/s10327-018-0765-8
Permanent link to this page (URI)
https://res.slu.se/id/publ/94541