Emergence of bacterial soft rot in calla lily caused by Pectobacterium aroidearum in China

被引:4
作者
Li, Lei [1 ]
Yuan, Lifang [1 ,2 ]
Zhao, Yurong [1 ]
Shi, Yanxia [1 ]
Chai, Ali [1 ]
Xie, Xuewen [1 ]
Li, Baoju [1 ]
机构
[1] Chinese Acad Agr Sci, Inst Vegetables & Flowers, Beijing 100081, Peoples R China
[2] China Agr Univ, Coll Plant Protect, Dept Plant Pathol, Beijing 100193, Peoples R China
基金
中国国家自然科学基金;
关键词
Bacterial soft rot; Calla lily; Pectobacterium aroidearum; Phylogeny; Host range; CAROTOVORUM SUBSP BRASILIENSE; ZANTEDESCHIA-AETHIOPICA;
D O I
10.1016/j.cropro.2021.105854
中图分类号
S3 [农学(农艺学)];
学科分类号
0901 ;
摘要
Bacterial soft rot is a destructive disease affecting calla lily production, and it is mainly caused by Pectobacterium carotovorum (Pc). In 2019, this destructive disease was observed in the Shandong and Jiangsu Provinces of China and resulted in serious economic losses for commercial greenhouse producers of ornamental plants. The disease symptoms on leaves and stems were yellow and dark brown patches, and then water-soaked lesions that turned to wet rot occurred on the stems. In total, we obtained twenty-eight calla lily soft rot samples collected from Shandong and Jiangsu. Fifteen colonies on LB medium were milky white, nearly round, with a smooth surface and neat edges. The soft rot symptoms in calla lily caused by artificial inoculation were the same as the natural symptoms in the field. Based on the phenotypic properties determined by morphological, biochemical and physiological analyses, 16S ribosomal DNA gene sequence analysis, and multilocus sequence analysis, the pathogen was identified as P. aroidearum. In addition, all P. aroidearum strains exhibited high virulence and a wide host range on monocotyledonous and dicotyledonous plants. This study is the first official report of P. aroidearum causing calla lily soft rot in China, and the results contribute to a better understanding of the disease.
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页数:8
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