Microbial Sulfur Cycle in Two Hydrothermal Chimneys on the Southwest Indian Ridge
Cao, Huiluo1; Wang, Yong1,2; Lee, On On1; Zeng, Xiang3; Shao, Zongze3; Qian, Pei-Yuan1
2014
Source PublicationMBIO
Volume5Issue:1
AbstractSulfur is an important element in sustaining microbial communities present in hydrothermal vents. Sulfur oxidation has been extensively studied due to its importance in chemosynthetic pathways in hydrothermal fields; however, less is known about sulfate reduction. Here, the metagenomes of hydrothermal chimneys located on the ultraslow-spreading Southwest Indian Ridge (SWIR) were pyrosequenced to elucidate the associated microbial sulfur cycle. A taxonomic summary of known genes revealed a few dominant bacteria that participated in the microbial sulfur cycle, particularly sulfate-reducing Deltaproteobacteria. The metagenomes studied contained highly abundant genes related to sulfur oxidation and reduction. Several carbon metabolic pathways, in particular the Calvin-Benson-Bassham pathway and the reductive tricarboxylic acid cycles for CO2 fixation, were identified in sulfur-oxidizing autotrophic bacteria. In contrast, highly abundant genes related to the oxidation of short-chain alkanes were grouped with sulfate-reducing bacteria, suggesting an important role for short-chain alkanes in the sulfur cycle. Furthermore, sulfur-oxidizing bacteria were associated with enrichment for genes involved in the denitrification pathway, while sulfate-reducing bacteria displayed enrichment for genes responsible for hydrogen utilization. In conclusion, this study provides insights regarding major microbial metabolic activities that are driven by the sulfur cycle in low-temperature hydrothermal chimneys present on an ultraslow midocean ridge.
SubtypeArticle
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine
DOI10.1128/mBio.00980-13
Indexed BySCI
Language英语
WOS KeywordRIBOSOMAL-RNA ; GEN. NOV. ; SEA ; DEEP ; SULFATE ; COMMUNITIES ; VENTS ; OXIDATION ; OCEAN ; GEOMICROBIOLOGY
WOS SubjectMicrobiology
WOS IDWOS:000332526500009
Citation statistics
Cited Times:30[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.idsse.ac.cn/handle/183446/1210
Collection深海科学研究部_深海生物学研究室_海洋微生物宏基因组与分子进化研究组
Affiliation1.Hong Kong Univ Sci & Technol, Div Life Sci, Hong Kong, Hong Kong, Peoples R China
2.Sanya Inst Deep Sea Sci & Engn, San Ya, Hai Nan, Peoples R China
3.State Ocean Adm, Inst Oceanog 3, Key Lab Marine Biogenet Resources, Xiamen, Peoples R China
Recommended Citation
GB/T 7714
Cao, Huiluo,Wang, Yong,Lee, On On,et al. Microbial Sulfur Cycle in Two Hydrothermal Chimneys on the Southwest Indian Ridge[J]. MBIO,2014,5(1).
APA Cao, Huiluo,Wang, Yong,Lee, On On,Zeng, Xiang,Shao, Zongze,&Qian, Pei-Yuan.(2014).Microbial Sulfur Cycle in Two Hydrothermal Chimneys on the Southwest Indian Ridge.MBIO,5(1).
MLA Cao, Huiluo,et al."Microbial Sulfur Cycle in Two Hydrothermal Chimneys on the Southwest Indian Ridge".MBIO 5.1(2014).
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