文献类型： 外文期刊
作者： Wei, Qi 1 ; Li, Jie 2 ; Yang, Shuai 1 ; Wang, Wenzhong 1 ; Min, Fanxiang 1 ; Guo, Mei 1 ; Zhang, Shu 1 ; Dong, Xuezhi 1 ; Hu, Linshuang 1 ; Li, Zhugang 3 ; Wang, Xiaodan 2 ;
作者机构： 1.Heilongjiang Acad Agr Sci, Potato Res Inst, Harbin 150016, Peoples R China
2.China Agr Univ, Coll Plant Protect, Dept Plant Pathol, Beijing 100193, Peoples R China
3.Heilongjiang Acad Agr Sci, Inst Tillage & Cultivat, Harbin 150016, Peoples R China
关键词： common scab; pathogenic gene; pathogenicity; potato; Streptomyces spp.
期刊名称：PLANT DISEASE （ 影响因子：4.614； 五年影响因子：5.33 ）
ISSN： 0191-2917
年卷期： 2022 年 106 卷 1 期
页码：
收录情况： SCI
摘要： 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-41(T) , 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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