globalchange  > 影响、适应和脆弱性
DOI: 10.1111/gbi.12261
Scopus记录号: 2-s2.0-85032283640
论文题名:
Cyanobacterial formation of intracellular Ca-carbonates in undersaturated solutions
作者: Cam N.; Benzerara K.; Georgelin T.; Jaber M.; Lambert J.-F.; Poinsot M.; Skouri-Panet F.; Moreira D.; López-García P.; Raimbault E.; Cordier L.; Jézéquel D.
刊名: Geobiology
ISSN: 1472-4677
EISSN: 1472-4669
出版年: 2018
卷: 16, 期:1
起始页码: 49
结束页码: 61
语种: 英语
英文关键词: biomineralization ; calcium homeostasis ; cyanobacteria ; polyphosphates
Scopus关键词: biomineralization ; buffering ; calcium carbonate ; cells and cell components ; chemical composition ; cyanobacterium ; environmental conditions ; homeostasis ; phosphate ; precipitation (chemistry) ; Cyanobacteria
Scopus学科分类: Earth and Planetary Sciences: General Earth and Planetary Sciences ; Environmental Science: General Environmental Science ; Agricultural and Biological Sciences: Ecology, Evolution, Behavior and Systematic
英文摘要: Cyanobacteria have long been thought to induce the formation of Ca-carbonates as secondary by-products of their metabolic activity, by shifting the chemical composition of their extracellular environment to conditions favoring mineral precipitation. Some cyanobacterial species forming Ca-carbonates intracellularly were recently discovered. However, the environmental conditions under which this intracellular biomineralization process can occur and the impact of cyanobacterial species forming Ca-carbonates intracellularly on extracellular carbonatogenesis are not known. Here, we show that these cyanobacteria can form Ca-carbonates intracellularly while growing in extracellular solutions undersaturated with respect to all Ca-carbonate phases, that is, conditions thermodynamically unfavorable to mineral precipitation. This shows that intracellular Ca-carbonate biomineralization is an active process; that is, it costs energy provided by the cells. The cost of energy may be due to the active accumulation of Ca intracellularly. Moreover, unlike cyanobacterial strains that have been usually considered before by studies on Ca-carbonate biomineralization, cyanobacteria forming intracellular carbonates may slow down or hamper extracellular carbonatogenesis, by decreasing the saturation index of their extracellular solution following the buffering of the concentration of extracellular calcium to low levels. © 2017 John Wiley & Sons Ltd
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/85025
Appears in Collections:影响、适应和脆弱性

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作者单位: Institut de Minéralogie, de Physique des Matériaux, et de Cosmochimie (IMPMC), UMR CNRS 7590, Muséum National d'Histoire Naturelle, IRD UMR 206, Sorbonne Universités, UPMC Univ Paris 6, Paris, France; Laboratoire de Réactivité de Surface (LRS), UMR CNRS 7197, Sorbonne Universités, UPMC Univ Paris 6, Paris, France; Laboratoire d'Archéologie Moléculaire et Structurale (LAMS), Sorbonne Universités, UMR CNRS 8220, UPMC Univ Paris 6, Paris, France; Unité d'Ecologie, Systématique et Evolution, CNRS UMR 8079, AgroParisTech, Université Paris-Sud/Paris-Saclay, Orsay, France; Institut de Physique du Globe de Paris (IPGP), Sorbonne Paris Cité–Université Paris Diderot, UMR CNRS 7154, Paris Cedex 05, France

Recommended Citation:
Cam N.,Benzerara K.,Georgelin T.,et al. Cyanobacterial formation of intracellular Ca-carbonates in undersaturated solutions[J]. Geobiology,2018-01-01,16(1)
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