文献类型： 外文期刊

作者： Zhang, X. X. ¹ ; Chen, J. Y. ¹ ; Wang, Z. Y. ¹ ; Zou, H. D. ¹ ; Luo, Z. X. ¹ ; Yao, Z. F. ¹ ; Yang, Y. L. ¹ ; Fang, B. P. ¹ ;

作者机构： 1.Guangdong Acad Agr Sci, Crops Res Inst, Guangdong Prov Key Lab Crops Genet & Improvement, Guangzhou 510640, Peoples R China

关键词： Burkholderia gladioli; Bacterial internal browning; Sweetpotato; Carbon source utilization; 16S rDNA; 16S-23S rDNA ITS

期刊名称：AUSTRALASIAN PLANT PATHOLOGY （ 影响因子：1.599； 五年影响因子：1.708 ）

ISSN： 0815-3191

年卷期： 2020 年 49 卷 2 期

页码：

收录情况： SCI

摘要： A new bacterial disease of sweetpotato was recently identified in Puning, Guangdong Province, China and is referred to bacterial internal browning of sweetpotato in this paper. One-third of the tubers of sweetpotato were infected in the field. These tubers in the field with bacterial inner brown displayed yellowing on the skin that turned into slightly roughened and cracked surface with progress in disease. Cross-sections of these roots revealed a yellowish brown or dark brown circle in the vascular cambium. Pathogenicity tests were conducted on different organs of two sweetpotato cultivars and revealed that the isolated bacteria are pathogenic on stems and roots. We confirmed the causal agent as Burkholderia gladioli based on biochemical and physiological characterization, carbon source utilization, and sequence analysis of partial 16S rDNA and 16S-23S rDNA internal transcribed spacer (ITS) region. To our knowledge, it is the first report on the occurrence of B. gladioli in sweetpotato as a pathogen.