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Wei Q, Li J, Yang S, Wang W, Min F, Guo M, Zhang S, Dong X, Hu L, Li Z, Wang X. Streptomyces rhizophilus Causes Potato Common Scab Disease. PLANT DISEASE 2022; 106:266-274. [PMID: 34615364 DOI: 10.1094/pdis-09-20-1902-re] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Common scab (CS) caused by Streptomyces spp. is a significant soilborne potato disease that results in tremendous economic losses globally. Identification of CS-associated species of the genus Streptomyces can enhance understanding of the genetic variation of these bacterial species and is necessary for the control of this epidemic disease. The present study isolated Streptomyces strain 6-2-1(1) from scabby potatoes in Keshan County, Heilongjiang Province, China. PCR analysis confirmed that the strain harbored the characteristic Streptomyces pathogenicity island (PAI) genes (txtA, txtAB, nec1, and tomA). Pathogenicity assays proved that the strain caused typical scab lesions on potato tuber surfaces and necrosis on radish seedlings and potato slices. Subsequently, the strain was systemically characterized at morphological, physiological, biochemical, and phylogenetic levels. Phylogenetic analysis based on 16S rRNA gene sequences revealed that strain 6-2-1(1) shared 99.86% sequence similarity with Streptomyces rhizophilus JR-41T, isolated initially from bamboo in rhizospheric soil in Korea. PCR amplification followed by Sanger sequencing of the 16S rRNA gene of 164 scabby potato samples collected in Heilongjiang Province from 2019 to 2020 demonstrated that approximately 2% of the tested samples were infected with S. rhizophilus. Taken together, these results demonstrate that S. rhizophilus is capable of causing potato CS disease and may pose a potential challenge to potato production in Heilongjiang Province of China.
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Affiliation(s)
- Qi Wei
- Potato Research Institute, Heilongjiang Academy of Agricultural Sciences, Harbin 150016, China
| | - Jie Li
- Department of Plant Pathology, College of Plant Protection, China Agricultural University, Beijing 100193, China
| | - Shuai Yang
- Potato Research Institute, Heilongjiang Academy of Agricultural Sciences, Harbin 150016, China
| | - Wenzhong Wang
- Potato Research Institute, Heilongjiang Academy of Agricultural Sciences, Harbin 150016, China
| | - Fanxiang Min
- Potato Research Institute, Heilongjiang Academy of Agricultural Sciences, Harbin 150016, China
| | - Mei Guo
- Potato Research Institute, Heilongjiang Academy of Agricultural Sciences, Harbin 150016, China
| | - Shu Zhang
- Potato Research Institute, Heilongjiang Academy of Agricultural Sciences, Harbin 150016, China
| | - Xuezhi Dong
- Potato Research Institute, Heilongjiang Academy of Agricultural Sciences, Harbin 150016, China
| | - Linshuang Hu
- Potato Research Institute, Heilongjiang Academy of Agricultural Sciences, Harbin 150016, China
| | - Zhugang Li
- Institute of Tillage and Cultivation, Heilongjiang Academy of Agricultural Sciences, Harbin 150016, China
| | - Xiaodan Wang
- Department of Plant Pathology, College of Plant Protection, China Agricultural University, Beijing 100193, China
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