Sea urchin spine calcite forms via a transient amorphous calcium carbonate phase

被引:821
作者
Politi, Y
Arad, T
Klein, E
Weiner, S
Addadi, L [1 ]
机构
[1] Weizmann Inst Sci, Dept Biol Struct, IL-76100 Rehovot, Israel
[2] Weizmann Inst Sci, Chem Res Support Unit, IL-76100 Rehovot, Israel
关键词
D O I
10.1126/science.1102289
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
The skeletons of adult echinoderms comprise large single crystals of calcite with smooth convoluted fenestrated morphologies, raising many questions about how they form. By using water etching, infrared spectroscopy, electron diffraction, and environmental scanning electron microscopy, we show that sea urchin spine regeneration proceeds via the initial deposition of amorphous calcium carbonate. Because most echinoderms produce the same type of skeletal material, they probably all use this same mechanism. Deposition of transient amorphous phases as a strategy for producing single crystals with complex morphology may have interesting implications for the development of sophisticated materials.
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页码:1161 / 1164
页数:4
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