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题名: Vernalophrys algivore gen. nov., sp nov (Rhizaria: Cercozoa: Vampyrellida), a New Algal Predator Isolated from Outdoor Mass Culture of Scenedesmus dimorphus
作者: Gong, Yingchun1, 2, 3; Patterson, David J.4; Li, Yunguang5; Hu, Zixuan6; Sommerfeld, Milton3; Chen, Yongsheng6; Hu, Qiang1, 2, 3
通讯作者: Gong, YC (reprint author), Chinese Acad Sci, Inst Hydrobiol, Ctr Microalgal Biotechnol & Biofuels, Wuhan, Peoples R China.
刊名: APPLIED AND ENVIRONMENTAL MICROBIOLOGY
发表日期: 2015-06-01
DOI: 10.1128/AEM.00160-15
卷: 81, 期:12, 页:3900-3913
收录类别: SCI
文章类型: Article
部门归属: [Gong, Yingchun ; Hu, Qiang] Chinese Acad Sci, Inst Hydrobiol, Ctr Microalgal Biotechnol & Biofuels, Wuhan, Peoples R China ; [Gong, Yingchun ; Hu, Qiang] Chinese Acad Sci, Inst Hydrobiol, Key Lab Algal Biol, Wuhan, Peoples R China ; [Gong, Yingchun ; Sommerfeld, Milton ; Hu, Qiang] Arizona State Univ, Coll Technol & Innovat, Lab Algae Res & Biotechnol, Mesa, AZ USA ; [Patterson, David J.] Univ Sydney, Sch Biol Sci, Sydney, NSW 2006, Australia ; [Li, Yunguang] Huazhong Agr Univ, Coll Life Sci & Technol, Wuhan, Peoples R China ; [Hu, Zixuan ; Chen, Yongsheng] Georgia Inst Technol, Sch Civil & Environm Engn, Atlanta, GA 30332 USA
WOS标题词: Science & Technology ; Life Sciences & Biomedicine
类目[WOS]: Biotechnology & Applied Microbiology ; Microbiology
研究领域[WOS]: Biotechnology & Applied Microbiology ; Microbiology
英文摘要: Microbial contamination is the main cause of loss of biomass yield in microalgal cultures, especially under outdoor environmental conditions. Little is known about the identities of microbial contaminants in outdoor mass algal cultures. In this study, a new genus and species of vampyrellid amoeba, Vernalophrys algivore, is described from cultures of Scenedesmus dimorphus in open raceway ponds and outdoor flat-panel photobioreactors. This vampyrellid amoeba was a significant grazer of Scenedesmus and was frequently associated with a very rapid decline in algal numbers. We report on the morphology, subcellular structure, feeding behavior, molecular phylogeny, and life cycle. The new amoeba resembles Leptophrys in the shape of trophozoites and pseudopodia and in the mechanism of feeding (mainly by engulfment). It possesses two distinctive regions in helix E10_1 (nucleotides 117 to 119, CAA) and E23_1 (nucleotides 522 and 523, AG) of the 18S rRNA gene. It did not form a monophyletic group with Leptophrys in molecular phylogenetic trees. We establish a new genus, Vernalophrys, with the type species Vernalophrys algivore. The occurrence, impact of the amoeba on mass culture of S. dimorphus, and means to reduce vampyrellid amoeba contamination in Scenedesmus cultures are addressed. The information obtained from this study will be useful for developing an early warning system and control measures for preventing or treating this contaminant in microalgal mass cultures.
关键词[WOS]: PHYLOGENETIC TREES ; SEQUENCE ALIGNMENT ; FILOSE AMEBAS ; NAKED FILOSE ; PARASITES ; GROWTH ; CILIOPHORA ; INTERFACE ; INFERENCE ; POSITION
语种: 英语
WOS记录号: WOS:000354864000001
ISSN号: 0099-2240
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.ihb.ac.cn/handle/342005/23878
Appears in Collections:藻类生物技术和生物能源研发中心_期刊论文

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作者单位: 1.Chinese Acad Sci, Inst Hydrobiol, Ctr Microalgal Biotechnol & Biofuels, Wuhan, Peoples R China
2.Chinese Acad Sci, Inst Hydrobiol, Key Lab Algal Biol, Wuhan, Peoples R China
3.Arizona State Univ, Coll Technol & Innovat, Lab Algae Res & Biotechnol, Mesa, AZ USA
4.Univ Sydney, Sch Biol Sci, Sydney, NSW 2006, Australia
5.Huazhong Agr Univ, Coll Life Sci & Technol, Wuhan, Peoples R China
6.Georgia Inst Technol, Sch Civil & Environm Engn, Atlanta, GA 30332 USA
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