气候变化领域集成服务门户(CCPortal): Evidence of high Ca uptake by cyanobacteria forming intracellular CaCO3 and impact on their growth

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DOI	10.1111/gbi.12358
	Evidence of high Ca uptake by cyanobacteria forming intracellular CaCO3 and impact on their growth
	De Wever A.; Benzerara K.; Coutaud M.; Caumes G.; Poinsot M.; Skouri-Panet F.; Laurent T.; Duprat E.; Gugger M.
发表日期	2019
ISSN	14724677
起始页码	676
结束页码	690
卷号	17 期号:6
英文摘要	Several species of cyanobacteria biomineralizing intracellular amorphous calcium carbonates (ACC) were recently discovered. However, the mechanisms involved in this biomineralization process and the determinants discriminating species forming intracellular ACC from those not forming intracellular ACC remain unknown. Recently, it was hypothesized that the intensity of Ca uptake (i.e., how much Ca was scavenged from the extracellular solution) might be a major parameter controlling the capability of a cyanobacterium to form intracellular ACC. Here, we tested this hypothesis by systematically measuring the Ca uptake by a set of 52 cyanobacterial strains cultured in the same growth medium. The results evidenced a dichotomy among cyanobacteria regarding Ca sequestration capabilities, with all strains forming intracellular ACC incorporating significantly more calcium than strains not forming ACC. Moreover, Ca provided at a concentration of 50 μM in BG-11 was shown to be limiting for the growth of some of the strains forming intracellular ACC, suggesting an overlooked quantitative role of Ca for these strains. All cyanobacteria forming intracellular ACC contained at least one gene coding for a mechanosensitive channel, which might be involved in Ca influx, as well as at least one gene coding for a Ca2+/H+ exchanger and membrane proteins of the UPF0016 family, which might be involved in active Ca transport either from the cytosol to the extracellular solution or the cytosol toward an intracellular compartment. Overall, massive Ca sequestration may have an indirect role by allowing the formation of intracellular ACC. The latter may be beneficial to the growth of the cells as a storage of inorganic C and/or a buffer of intracellular pH. Moreover, high Ca scavenging by cyanobacteria biomineralizing intracellular ACC, a trait shared with endolithic cyanobacteria, suggests that these cyanobacteria should be considered as potentially significant geochemical reservoirs of Ca. © 2019 John Wiley & Sons Ltd
关键词	biomineralization calcium calcium carbonate cyanobacterium membrane nutrient uptake parameterization protein sequestration (chemistry)Cyanobacteria calcium calcium carbonate cyanobacterium growth, development and aging metabolism species difference Calcium Calcium Carbonate Cyanobacteria Species Specificity
语种	英语
来源机构	Geobiology
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/133221
推荐引用方式 GB/T 7714	De Wever A.,Benzerara K.,Coutaud M.,et al. Evidence of high Ca uptake by cyanobacteria forming intracellular CaCO3 and impact on their growth[J]. Geobiology,2019,17(6).
APA	De Wever A..,Benzerara K..,Coutaud M..,Caumes G..,Poinsot M..,...&Gugger M..(2019).Evidence of high Ca uptake by cyanobacteria forming intracellular CaCO3 and impact on their growth.,17(6).
MLA	De Wever A.,et al."Evidence of high Ca uptake by cyanobacteria forming intracellular CaCO3 and impact on their growth".17.6(2019).