Salinity-dependent diatom biosilicification implies an important role of external ionic strength

Salinity-dependent diatom biosilicification implies an important role of external ionic strength
复制标题

盐度依赖性硅藻生物硅化意味着外部离子强度的重要作用

DOI:
10.1073/pnas.0608980104
复制
发表时间:
2007-06
影响因子:
11.1
通讯作者:
Tian, Mingwen
Tian, Mingwen
中科院分区:
综合性期刊1区
文献类型:
--
作者:
van Santen, Rutger A.;Vrieling, Engel G.;Sommerdijk, Nico A. J. M.;Kooyman, Patricia J.;Gieskes, Winfried W. C.;Sun, Qianyao;Tian, Mingwen

文献摘要

参考文献

相似文献

外部离子强度在硅藻生物二氧化硅形成中的作用通过监测两种海洋硅藻物种Thalassiosira punctigera和Thalassiosira weissfloclobus的生物二氧化硅中的纳米结构变化来评估,所述两种海洋硅藻物种Thalassiosira punctigera和Thalassiosira weissfloclobus从在两种不同盐度下生长的培养物中获得。使用物理化学方法,我们发现,在较低的盐度的比表面积,分形维数,和中孔的大小存在于生物二氧化硅减少。硅藻生物硅似乎在所施加的较低盐度下密度更大。这种现象可以通过假设二氧化硅沉积囊泡内的较小聚结二氧化硅颗粒的聚集来解释,这将符合二氧化硅化学中的原理。显然,外部离子强度对硅藻生物二氧化硅的形成有重要影响,这使得人们很容易提出硅酸和其他外部离子的吸收可能同时发生。通过(宏观)胞饮作用,在膨胀的二氧化硅沉积囊泡附近的反应物的摄取和运输比在高浓度下的二氧化硅前体的细胞内稳定和运输更可能,所述高浓度是形成硅质硅藻壳组分所必需的。
The role of external ionic strength in diatom biosilica formation was assessed by monitoring the nanostructural changes in the biosilica of the two marine diatom species Thalassiosira punctigera and Thalassiosira weissflogii that was obtained from cultures grown at two distinct salinities. Using physicochemical methods, we found that at lower salinity the specific surface area, the fractal dimensions, and the size of mesopores present in the biosilica decreased. Diatom biosilica appears to be denser at the lower salinity that was applied. This phenomenon can be explained by assuming aggregation of smaller coalescing silica particles inside the silica deposition vesicle, which would be in line with principles in silica chemistry. Apparently, external ionic strength has an important effect on diatom biosilica formation, making it tempting to propose that uptake of silicic acid and other external ions may take place simultaneously. Uptake and transport of reactants in the proximity of the expanding silica deposition vesicle, by (macro)pinocytosis, are more likely than intracellular stabilization and transport of silica precursors at the high concentrations that are necessary for the formation of the siliceous frustule components.
DOI: 10.1080/09670269910001736362
发表时间: 1999-08
影响因子: 2.4
作者:
E. G. Vrieling;L. Poort;T. P. Beelen;W. Gieskes
通讯作者: E. G. Vrieling;L. Poort;T. P. Beelen;W. Gieskes
DOI: 10.1126/science.1101156
发表时间: 2004-10-01
期刊: SCIENCE
影响因子: 56.9
作者:
Armbrust, EV;Berges, JA;Rokhsar, DS
通讯作者: Rokhsar, DS
DOI: 10.1111/j.0022-3646.1984.00563.x
发表时间: 1984-12
影响因子: 2.9
作者:
J. A. Boyle;J. Pickett-Heaps;D. B. Czarnecki
通讯作者: J. A. Boyle;J. Pickett-Heaps;D. B. Czarnecki
DOI: 10.1007/bf00447484
发表时间: 1987-06
期刊: Marine Biology
影响因子: 2.4
作者:
M. Veldhuis;W. Admiraal
通讯作者: M. Veldhuis;W. Admiraal
DOI: 10.1016/s0074-7696(08)61544-2
发表时间: 1994
影响因子: --
作者:
R. Gordon;R. W. Drum
通讯作者: R. Gordon;R. W. Drum