title: Citricoccus lacusdiani sp. nov., an actinobacterium promoting Microcystis growth with limited soluble phosphorus.
abstract: A novel actinobacterium, designated strain JXJ CY 21T, was isolated from the culture mass of Microcystis sp. FACHB-905 collected from Lake Dianchi, South-west China. Polyphasic taxonomic study revealed that the isolate should be a member of the genus Citricoccus. Comparison of the 16S rRNA gene sequence of strain JXJ CY 21Twith the available sequences in the GenBank database showed that the strain is closely related to Citricoccus zhacaiensis FS24T(97.8 % similarity), Citricoccus parietis 02-Je-010T(97.7 %), Citricoccus terreus V3M1T(97.6 %), Citricoccus nitrophenolicus PNP1T(97.2 %), Citricoccus alkalitolerans YIM 70010T(97.2 %) and Citricoccus muralis 4-0T(97.0 %). The DNA-DNA hybridization values between strain JXJ CY 21Tand the related type strains C. zhacaiensis FS24Tand C. parietis 02-Je-010Twere 16.0 ± 2.6 and 5.4 ± 1.7 %, respectively. The peptidoglycan in the cell wall was A4α type containing lysine-glutamic acid-glycine. The major respiratory menaquinone was found to be MK-8 (H2) (98.5 %), while the major cellular fatty acids (>10 %) were anteiso-C15:0, iso-C16:0, iso-C15:0and iso-C14:0. The polar lipids detected were diphosphatidylglycerol, phosphatidylinositol, phosphatidylglycerol, an unidentified phospholipid and an unidentified glycolipid. The DNA G + C content was determined to be 62.7 mol%. Strain JXJ CY 21Tcan solubilize both insoluble inorganic and organic phosphates up to 24.7 and 1.7 mg/l respectively. This property of the novel actinobacterium acts as a modulator for enhancement of growth of Microcystis sp. FACHB-905 in the lake ecosystem where the amount of soluble phosphate is limited. On the basis of the above taxonomic data, strain JXJ CY 21Trepresents a novel species of the genus Citricoccus, for which the name Citricoccus lacusdiani sp. nov. is proposed. The type strain is JXJ CY 21T(=KCTC 29653T= DSM 29160T).
authors: College of Life Science, Jiujiang University, Jiujiang, 332000, People's Republic of China.|State Key Laboratory of Biocontrol and Guangdong Provincial Key Laboratory of Plant Resources, School of Life Sciences, Sun Yat-Sen University, Guangzhou, 510275, People's Republic of China.
authors: Bing-Huo
authors: BH
authors: Zhang
authors: State Key Laboratory of Biocontrol and Guangdong Provincial Key Laboratory of Plant Resources, School of Life Sciences, Sun Yat-Sen University, Guangzhou, 510275, People's Republic of China.
authors: Nimaichand
authors: N
authors: Salam
authors: State Key Laboratory of Biocontrol and Guangdong Provincial Key Laboratory of Plant Resources, School of Life Sciences, Sun Yat-Sen University, Guangzhou, 510275, People's Republic of China.
authors: Juan
authors: J
authors: Cheng
authors: State Key Laboratory of Biocontrol and Guangdong Provincial Key Laboratory of Plant Resources, School of Life Sciences, Sun Yat-Sen University, Guangzhou, 510275, People's Republic of China.
authors: Min
authors: M
authors: Xiao
authors: College of Life Science, Jiujiang University, Jiujiang, 332000, People's Republic of China.
authors: Han-Quan
authors: HQ
authors: Li
authors: College of Life Science, Jiujiang University, Jiujiang, 332000, People's Republic of China.
authors: Jian-Yuan
authors: JY
authors: Yang
authors: College of Life Science, Jiujiang University, Jiujiang, 332000, People's Republic of China.
authors: Dai-Ming
authors: DM
authors: Zha
authors: State Key Laboratory of Biocontrol and Guangdong Provincial Key Laboratory of Plant Resources, School of Life Sciences, Sun Yat-Sen University, Guangzhou, 510275, People's Republic of China. liwenjun3@mail.sysu.edu.cn.|Key Laboratory of Biogeography and Bioresource in Arid Land, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Ürümqi, 830011, People's Republic of China. liwenjun3@mail.sysu.edu.cn.
authors: Wen-Jun
authors: WJ
authors: Li
mesh_terms: D001482:Base Composition; D004269:DNA, Bacterial; D008835:Micrococcaceae / Q000145:classification / Q000302:isolation & purification* / Q000378:metabolism; D046931:Microcystis / Q000378:metabolism; D058889:Molecular Typing; D010758:Phosphorus / Q000378:metabolism*; D012329:RNA, Bacterial; D012336:RNA, Ribosomal, 16S
chemical_list: D004269:DNA, Bacterial; D012329:RNA, Bacterial; D012336:RNA, Ribosomal, 16S; D010758:Phosphorus
keywords: Citricoccus lacusdiani sp. nov.; Growth-promotion; Lake Dianchi; Microcystis sp.; Phosphate-solubilization