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Nitrogen-Fixing Heterocystous Cyanobacteria in the Tonian Period
Pang, Ke (庞科)1,2; Tang, Qing2; Chen, Lei3; Wan, Bin (万斌)1; Niu, Changtai1,4; Yuan, Xunlai (袁训来)1,5; Xiao, Shuhai2
2018-02-19
Source PublicationCURRENT BIOLOGY
ISSN0960-9822
Volume28Issue:4Pages:616-+
Abstract

Cyanobacteria were the ultimate ancestor of all plastids and, for much of Earth's history, the only source of biogenic oxygen and a major source of fixed carbon and nitrogen. One cyanobacterial clade, subsections IV+V, is characterized by multicellularity and cell differentiation, with many members bearing specialized nitrogen-fixing (or diazotrophic) heterocysts and encysting akinetes [1-3]. Molecular clock estimates of the divergence time of this clade are highly variable, ranging from similar to 2,000 Ma (mega-annum) [4-9] to similar to 500 Ma [10]. The older estimates are invariably calibrated by putative akinete fossils from Paleoproterozoic-Mesoproterozoic rocks around 2,100-1,400 Ma [3, 11, 12]. However, the interpretation of these fossils as akinetes has been questioned [13], and the next oldest akinete and heterocyst fossils are similar to 410 Ma [14]. Thus, the scarcity of reliable heterocystous cyanobacterial fossils significantly hampers our understanding of the evolution of complex multicellularity among cyanobacteria, their role in regulating geochemical cycles in the geological past, and our ability to calibrate cyanobacterial molecular clocks. Here, we report Tonian (similar to 1,000-720 Ma) filamentous cyanobacteria that are characterized by large cells, binary fission (for filament elongation), hormogonia (for asexual reproduction and dispersal), probable akinetes (for survival in adverse conditions), and by implication, diazotrophic heterocysts. The new fossils provide a minimum age calibration on the divergence of subsections IV+V and place a firm constraint on the evolution of akinetes and heterocysts.

DOI10.1016/j.cub.2018.01.008
Language英语
WOS KeywordBlue-green-algae ; Great Oxidation Event ; North China ; Marine Cyanobacteria ; Multicellularity ; Fossils ; Diversification ; Microfossils ; Populations ; Successions
Funding ProjectChinese Academy of Sciences[QYZDJ-SSW-DQC009] ; Chinese Academy of Sciences[XDB18000000] ; National Natural Science Foundation of China[41602007] ; National Natural Science Foundation of China[41502019] ; Chinese Ministry of Science and Technology[2013CB835000] ; Jiangsu Province Science Foundation of China[BK20161090] ; China Scholarship Council[201604910155] ; State Key Laboratory of Palaeobiology and Stratigraphy[20162109] ; National Science Foundation[EAR-1528553] ; NASA Exobiology and Evolutionary Biology Program[NNX15AL27G] ; SDUST Research Fund[2015YQJH102] ; SDUST Research Fund[2015RCJJ009]
WOS Research AreaBiochemistry & Molecular Biology ; Cell Biology
WOS SubjectBiochemistry & Molecular Biology ; Cell Biology
WOS IDWOS:000425377900028
Funding OrganizationChinese Academy of Sciences ; National Natural Science Foundation of China ; Chinese Ministry of Science and Technology ; Jiangsu Province Science Foundation of China ; China Scholarship Council ; State Key Laboratory of Palaeobiology and Stratigraphy ; National Science Foundation ; NASA Exobiology and Evolutionary Biology Program ; SDUST Research Fund
PublisherCELL PRESS
Citation statistics
Cited Times:5[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.nigpas.ac.cn/handle/332004/18842
Collection中国科学院南京地质古生物研究所
其他
Corresponding AuthorYuan, Xunlai (袁训来); Xiao, Shuhai
Affiliation1.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, State Key Lab Palaeobiol & Stratig, Nanjing 210008, Jiangsu, Peoples R China
2.Virginia Tech, Dept Geosci, Blacksburg, VA 24061 USA
3.Shandong Univ Sci & Technol, Coll Earth Sci & Engn, Qingdao 266590, Peoples R China
4.Univ Sci & Technol China, Hefei 230026, Anhui, Peoples R China
5.Nanjing Univ, Ctr Res & Educ Biol Evolut & Environm, Nanjing 210023, Jiangsu, Peoples R China
First Author AffilicationNanjing Institute of Geology and Palaeonotology,CAS
Corresponding Author AffilicationNanjing Institute of Geology and Palaeonotology,CAS
Recommended Citation
GB/T 7714
Pang, Ke ,Tang, Qing,Chen, Lei,et al. Nitrogen-Fixing Heterocystous Cyanobacteria in the Tonian Period[J]. CURRENT BIOLOGY,2018,28(4):616-+.
APA Pang, Ke .,Tang, Qing.,Chen, Lei.,Wan, Bin .,Niu, Changtai.,...&Xiao, Shuhai.(2018).Nitrogen-Fixing Heterocystous Cyanobacteria in the Tonian Period.CURRENT BIOLOGY,28(4),616-+.
MLA Pang, Ke ,et al."Nitrogen-Fixing Heterocystous Cyanobacteria in the Tonian Period".CURRENT BIOLOGY 28.4(2018):616-+.
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