title: [Archaeal diversity associated with sponge Pachychalina sp. analyzed by culture-independent approach].
abstract: With culture-independent approach, microbial total DNA was directly extracted from Pachychalina sp. Using the total microbial DNA as template, archaeal 16S rDNAs were amplified by PCR with universal primers. Amplified products were cloned into T-vector and secondarily amplified by PCR. Then the secondarily amplified products were purified to be further characterized by termed ARDRA (amplified rDNA restriction analysis). According to the enzyme restriction mapping, the apparent difference among them were disclosed. Furthermore eight archaeal cloned partial sequences were acquired and built up a phylogenetic tree. In the phylogenetic tree, the eight archaea belonged to Methanogenium organophilum and Methanoplanus petrolearius, but the 16S rDNAs similarities among them and those archaea registered in RDP Database didn't excess to 90%. It means that they maybe represent some novel archaeal groups.
authors.affiliation: State Key Laboratory of Tropical Crop Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, China. abslont@hotmail.com
authors.forename: Zai-guang
authors.initials: ZG
authors.lastname: Fang
authors.forename: Hui-qin
authors.initials: HQ
authors.lastname: Huang
authors.forename: Kai-shan
authors.initials: KS
authors.lastname: Zhang
authors.forename: Zhi-qiang
authors.initials: ZQ
authors.lastname: Pan
authors.forename: Shi-xiang
authors.initials: SX
authors.lastname: Bao
mesh_terms: D000818:Animals; D001105:Archaea / Q000145:classification* / Q000235:genetics / Q000302:isolation & purification; D019641:DNA, Archaeal / Q000235:genetics*; D010802:Phylogeny; D016133:Polymerase Chain Reaction; D012150:Polymorphism, Restriction Fragment Length; D011161:Porifera / Q000382:microbiology*; D012336:RNA, Ribosomal, 16S / Q000235:genetics*; D017422:Sequence Analysis, DNA
chemical_list: D019641:DNA, Archaeal; D012336:RNA, Ribosomal, 16S