title: [Identification of soft rot pathogens on Chinese cabbage [Brassica campestris L. ssp. chinensis (L.) Makino var. communis Tsen et Lee] in Beijing].
abstract: OBJECTIVE
  This study aimed to identify soft rot pathogens of Chinese cabbage [Brassica campestris L. ssp. chinensis (L.) Makino var. communis Tsen et Lee] in Beijing.
  
  
  METHODS
  The 40 strains isolated from Tongzhou and Daxing districts in Beijing were characterized by morphological, biological, biochemical and physiological methods, 16S rRNA sequence as well as 16S-23S rRNA intergenic spacer (IGS) region analysis.
  
  
  RESULTS
  The strains belonged to two different Pectobacterium carotovorum subspecies: 13 strains of them belonged to Pectobacterium carotovorum subsp. carotovorum (Pcc) and the other 27 strains belonged to Pectobacterium carotovorum subsp. brasiliensis (Pcb). The results of Chinese cabbage (Brassica campestris L. ssp. pekinensis) pathogenicity test showed that the strains in the same subspecies, origins and 16S rRNA gene sequences had significant differences in pathogenicity.
  
  
  CONCLUSIONS
  Pectobacterium carotovorum subsp. carotovorum and Pectobacterium carotovorum subsp. brasiliensis were the soft rot pathogens on Chinese cabbage [ Brassica campestris L. ssp. chinensis(L.) Makino var. communis Tsen et Lee] in Beijing. It was the first report that Pectobacterium carotovorum subsp. brasiliensis (Pcb) caused soft rot disease on cabbage in China.
authors.forename: Nana
authors.initials: N
authors.lastname: Hu
authors.forename: Chao
authors.initials: C
authors.lastname: Li
authors.forename: Qian
authors.initials: Q
authors.lastname: Wang
authors.forename: Jingpeng
authors.initials: J
authors.lastname: Shao
authors.forename: Yanquan
authors.initials: Y
authors.lastname: Liu
authors.forename: Liang
authors.initials: L
authors.lastname: Zhao
authors.forename: Rongcai
authors.initials: R
authors.lastname: Ma
authors.forename: Hua
authors.initials: H
authors.lastname: Xie
mesh_terms: D000068476:Beijing; D001937:Brassica / Q000382:microbiology*; D004269:DNA, Bacterial / Q000235:genetics; D008969:Molecular Sequence Data; D016973:Pectobacterium carotovorum / Q000145:classification / Q000235:genetics / Q000302:isolation & purification* / Q000502:physiology; D010802:Phylogeny; D010935:Plant Diseases / Q000382:microbiology*; D012336:RNA, Ribosomal, 16S / Q000235:genetics
chemical_list: D004269:DNA, Bacterial; D012336:RNA, Ribosomal, 16S