Salinity-dependent diatom biosilicification implies an important role of external ionic strength
Salinity-dependent diatom biosilicification implies an important role of external ionic strength
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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
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发表时间:
2007-06
影响因子:
11.1
通讯作者:
Tian, Mingwen
中科院分区:
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
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.
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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
影响因子:
56.9
作者:
Armbrust, EV;Berges, JA;Rokhsar, DS
通讯作者:
Rokhsar, DS
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
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