CRYSTAL-FORMATION AND GROWTH IN BIVALVE NACRE
CRYSTAL-FORMATION AND GROWTH IN BIVALVE NACRE
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DOI：
10.1038/248128a0
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发表时间：
1974-01-01
期刊：
影响因子：
64.8
通讯作者：
WATABE, N
中科院分区：
文献类型：
--
作者：
ERBEN, HK;WATABE, N
在软体动物的贝壳中，形成钠长石层的片状文石晶体的形成和生长有两种理论解释。“模板”或“基质”假说假设晶体成核和生长发生在贝壳蛋白膜的开放表面上，并且可能取决于该有机基质的活性位点2。这意味着一个过程相当于外延。相比之下，“隔室”假说设想成核和生长发生在有机沉积物的预先存在的中空隔室内，并受其控制3。两个最近的扫描电子显微镜（SEM）研究4表明，在腹足类有没有这样的隔间在生长前沿的naclonal层。然而，由于样本固定不充分，这些研究并不完全确定。因此，我们研究了几种双壳类中初始钠长石晶体的形成和生长。
THERE are two theoretical explanations of the initiation and growth of the tabular aragonite crystals forming the nacreous layer in molluscan shells. The ‘template’ or ‘matrix’ hypothesis assumes that crystal nucleation and growth occur on the open surface of conchiolin membranes and may depend on active sites of this organic substratum2. This implies a process comparable to epitaxy. In contrast, the ‘compartment’ hypothesis envisages that nucleation and growth occur within, and are controlled by, pre-existing hollow compartments of the organic deposits3. Two recent scanning electron microscope (SEM) studies4indicate that in gastropods there are no such compartments at the growth front of the nacreous layer. These studies are, however, not completely conclusive because of insufficient fixation of the samples. We have therefore studied the formation and growth of initial nacreous crystals in several species of bivalves.