A Novel Streptomyces sp. Strain PBSH9 for Controlling Potato Common Scab Caused by Streptomyces galilaeus
| Autor: | Li Yuchen, Liang Yan, Zhang Xiaoyu, Zhang Dongmei, Xing Xing, Li Chi, Li Dezhou, Jianjun Hao |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
0301 basic medicine biology Strain (chemistry) Common scab fungi Biological pest control food and beverages Plant Science biology.organism_classification 01 natural sciences Streptomyces Agar plate 03 medical and health sciences chemistry.chemical_compound Horticulture 030104 developmental biology chemistry Seed treatment Extracellular Agronomy and Crop Science 010606 plant biology & botany Sprouting |
| Zdroj: | Plant Disease. 104:1986-1993 |
| ISSN: | 1943-7692 0191-2917 |
| DOI: | 10.1094/pdis-07-19-1469-re |
| Popis: | Potato common scab is an important soilborne disease worldwide that can significantly reduce the quality and economic values of potato. The disease is caused by multiple species of Streptomyces, which are not well controlled due to lack of effective strategies. Streptomyces galilaeus has been recently identified as a dominant species causing potato common scab in Inner Mongolia, China. This study was focused on screening and characterizing antagonists for biological control against pathogenic S. galilaeus. Bacterial strain PBSH9 was isolated from a potato tuber. PBSH9 was identified as a Streptomyces sp. on the basis of morphological, physiological, and biochemical characteristics, as well as DNA sequence analysis. PBSH9 inhibited S. galilaeus with a diameter of inhibitory zone of 19.8 mm on agar plates. The extracellular filtrate of PBSH9 also inhibited S. galilaeus growth with a diameter of inhibition zone of 10.0 mm. Furthermore, PBSH9 promoted potato sprouting and emergence. Disease control was up to 81.88% in greenhouse trials, and from 47.64 to 73.97% in 3-year field trials. Among the tested inoculation methods, seed treatment was more effective than soil drenching for PBSH9 application. PBSH9 not only effectively controlled potato common scab but also increased potato growth. Thus, it can be a potential candidate for biocontrol agent. |
| Databáze: | OpenAIRE |
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