Calcified coccoid from Cambrian Miaolingian: Revealing the potential cellular structure of Epiphyton | |
Zhang, Xiyang1,2,3; Dai, Mingyue1; Wang, Min1; Qi, Yong'an1 | |
刊名 | PLOS ONE |
2019-03-14 | |
卷号 | 14期号:3页码:18 |
ISSN号 | 1932-6203 |
DOI | 10.1371/journal.pone.0213695 |
英文摘要 | Epiphyton, Renalcis, and Girvanella are ubiquitous genera of calcified cyanobacteria/algae from Early Paleozoic shallow-marine limestones. One genus, Epiphyton, is characterized by a particular dendritic outline, and extensive research has revealed the morphology of calcified remains although little information on cellular structure is known. The mass occurrence of calcified Epiphyton in microbialites from Cambrian Miaolingian, the Mianchi area of North China is preserved as black clots within thrombolites and have dendritic and spherical outlines when viewed with a petrographic microscope. These remains, visible under scanning electron microscope (SEM), also comprise spherical or rectangle capsules. These capsules are made up from external envelopes and internal calcite with numerous pits, which closely resemble modern benthic coccoid cyanobacteria. These pits are between 2 mu m and 4 mu m in diameter and are interpreted here to represent the remnants of degraded coccoid cells, while the calcite that surrounds these pits is interpreted as calcified thin extracellular polymeric substances (EPS). In contrast, associated capsular envelopes represent thick EPS mineralized by calcium carbonate with an admixture of Al-Mg-Fe silicates. Dendritic ` thalli' are typically stacked apically because of the repeated growth and calcification of these capsules. Carbon and oxygen isotope results are interpreted to indicate that both photosynthesis and heterotrophic bacterial metabolism (especially sulfate reducing bacteria) contributed to carbonate precipitation by elevated alkalinity. Epiphyton are therefore here interpreted as colonies of calcified coccoid cyanobacteria, and the carbonate-oversaturated seawater during the Cambrian was conducive to their mineralization. |
资助项目 | National Natural Science Foundation of China[41872111] |
WOS关键词 | CARBONATE PRECIPITATION ; CALCIUM-CARBONATE ; NORTH CHINA ; ALGAL MATS ; CYANOBACTERIA ; RENALCIS ; BIOMINERALIZATION ; STROMATOLITES ; MICROFOSSILS ; LIMESTONES |
WOS研究方向 | Science & Technology - Other Topics |
语种 | 英语 |
出版者 | PUBLIC LIBRARY SCIENCE |
WOS记录号 | WOS:000461166300062 |
资助机构 | National Natural Science Foundation of China |
内容类型 | 期刊论文 |
源URL | [http://ir.nigpas.ac.cn/handle/332004/15902] |
专题 | 中国科学院南京地质古生物研究所 |
通讯作者 | Qi, Yong'an |
作者单位 | 1.Henan Polytech Univ, Sch Resources & Environm, Jiaozuo, Henan, Peoples R China 2.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, State Key Lab Palaeobiol & Stratig, Nanjing, Jiangsu, Peoples R China 3.Chinese Acad Sci, Ctr Excellence Life & Paleoenvironm, Nanjing, Jiangsu, Peoples R China |
推荐引用方式 GB/T 7714 | Zhang, Xiyang,Dai, Mingyue,Wang, Min,et al. Calcified coccoid from Cambrian Miaolingian: Revealing the potential cellular structure of Epiphyton[J]. PLOS ONE,2019,14(3):18. |
APA | Zhang, Xiyang,Dai, Mingyue,Wang, Min,&Qi, Yong'an.(2019).Calcified coccoid from Cambrian Miaolingian: Revealing the potential cellular structure of Epiphyton.PLOS ONE,14(3),18. |
MLA | Zhang, Xiyang,et al."Calcified coccoid from Cambrian Miaolingian: Revealing the potential cellular structure of Epiphyton".PLOS ONE 14.3(2019):18. |
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