Salinity Influences the Response of Halomonas hydrothermalis to Artificial Fossilization by Evaporative Silicification
Salinity Influences the Response of Halomonas hydrothermalis to Artificial Fossilization by Evaporative Silicification
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盐度影响热液盐单胞菌对蒸发硅化人工化石的响应
DOI：
10.1080/01490451.2015.1045634
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发表时间：
2015
影响因子：
2.3
通讯作者：
Harrison J
中科院分区：
文献类型：
--
作者：
Harrison J
蒸发硅化可以驱动微生物在不同的自然栖息地。对这一过程的研究对于了解陆地化石记录和极端环境中生物标志物的保存至关重要。我们采用实验室实验，在低，中，高盐度（1，3.5或11.8%w/v的NaCl）的富铁或缺铁条件下培养的polyextremotolerant细菌盐单胞菌hydrothermalissilicate。通过将硅酸钠溶液（30或150 ppm的Si）添加到培养物上，然后蒸发来实现硅化。扫描电子显微镜显示在所有培养条件下均存在形态完整的矿化细菌。然而，多变量分析的衰减全反射傅里叶变换红外（ATR-FT-IR）光谱的硅化文化之间的显着差异，最显着的是在高盐度和低盐度培养后硅化的文化。尽管矿化的低盐和中盐培养物的光谱似乎与非硅化的对应物不同，但这些差异在高盐下并不那么明显。通过显示盐度的差异可以在分子水平上影响微生物对矿化的反应，这些数据表明，蒸发硅化作用对微生物矿化的贡献可能在淡水和高盐环境之间存在差异。
Evaporative silicification can drive microbial fossilization within diverse natural habitats. Research into this process is pivotal to understanding the terrestrial fossil record and the preservation of biomarkers within extreme environments. We employed laboratory experiments to silicify the polyextremotolerant bacteriumHalomonas hydrothermaliscultured at low, intermediate and high salinities (1, 3.5 or 11.8% w/v of NaCl) under iron-rich or iron-deprived conditions. Silicification was achieved by adding sodium silicate solution (30 or 150 ppm of Si) onto cultures, followed by evaporation. Scanning electron microscopy demonstrated the presence of mineralized bacteria with intact morphology across all culture conditions. However, multivariate analysis of the attenuated total reflectance Fourier-transform infrared (ATR-FT-IR) spectra of silicified cultures showed significant differences between the examined salinities, most notably between cultures silicified after incubation at high salinity and those at lower salinities. Although the spectra of mineralized low- and intermediate-salinity cultures appeared distinct from their nonsilicified counterparts, these differences were less pronounced at high salinity. By showing that differences in salinity can influence microbial responses to mineralization at the molecular level, these data indicate that the potential for evaporative silicification to contribute to microbial fossilization may differ between freshwater and hypersaline environments.
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DOI：
10.1016/j.jpba.2004.08.010
发表时间：
2005-04-29
影响因子：
3.4
作者：
Erukhimovitch, V;Pavlov, V;Huleihel, M
通讯作者：
Huleihel, M
DOI：
--
发表时间：
2011
期刊：
影响因子：
--
作者：
N. Tosca;S. McLennan;M. Lamb;J. Grotzinger
通讯作者：
J. Grotzinger
模拟二氧化硅烧结体中细长聚球藻细胞模具的形成和保存：对微化石鉴定的意义
DOI：
--
发表时间：
2013
期刊：
影响因子：
--
作者：
F. Orange;S. Lalonde;K. Konhauser
通讯作者：
K. Konhauser
火星上的化学鸿沟和蒸发岩组合
DOI：
--
发表时间：
2006
期刊：
影响因子：
--
作者：
N. Tosca;S. McLennan
通讯作者：
S. McLennan
影响因子：
3.2
作者：
S. Varghese;Yue-qin Tang;J. Imlay
通讯作者：
S. Varghese;Yue-qin Tang;J. Imlay