title: [Cloning and sequencing of 16S rRNA gene of Phytoplasma CWB1 strain associated with cactus witches' broom].
abstract: A 1.5 kb DNA fragment was amplified in DNA samples extracted from Opuntia salmiana porm showed witches'-broom symptom. The result indicates the existence of phytoplasma associated with this disease and this phytoplasma was designated as CWB1. The amplified fragment was ligated to pGEM-T easy vector and then transformed into JM109 strain of E. coli. Cloned DNA fragments were verified by PCR, restriction endonuclease (EcoRI) digestion and sequence analysis. The result revealed that the 16S rRNA gene of CWB1 consists of 1489 bp and shared 99.7% homology with Faba bean phyllody which belongs to phytoplasma 16S rII-C subgroup. So we can classify this strain into phytoplasma 16S rII-C subgroup.
authors.affiliation: Key Laboratory of Plant Pathology of Yunnan Province, Yunnan Agricultural University, Kunming 650201.
authors.forename: H
authors.initials: H
authors.lastname: Cai
authors.forename: F
authors.initials: F
authors.lastname: Li
authors.forename: B
authors.initials: B
authors.lastname: Kong
authors.forename: H
authors.initials: H
authors.lastname: Chen
mesh_terms: D003001:Cloning, Molecular; D004269:DNA, Bacterial / Q000235:genetics; D004275:DNA, Ribosomal / Q000235:genetics*; D005798:Genes, Bacterial; D008969:Molecular Sequence Data; D029747:Opuntia / Q000382:microbiology*; D010802:Phylogeny; D045582:Phytoplasma / Q000145:classification / Q000235:genetics* / Q000472:pathogenicity; D010935:Plant Diseases / Q000382:microbiology; D012336:RNA, Ribosomal, 16S / Q000235:genetics*; D017422:Sequence Analysis, DNA; D012689:Sequence Homology, Nucleic Acid
chemical_list: D004269:DNA, Bacterial; D004275:DNA, Ribosomal; D012336:RNA, Ribosomal, 16S