貝殼及び眞珠形成機序のradioautographyによる研究特にCa45及びP32の分布について

概要

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In order to understand the mechanism of the shell-and pearl formation, the distribution of P32 and Ca45 was observed in the mantle of the pearl oyster, Pteria (Pinctada) martensii (DUNKER), through radioautography. For the study of localization of P32 and Ca45, each 20 specimens were placed in aquarium to which P32 or Ca45 were added. After specimens were breeded in P32 or Ca45 added sea water for periods ranging from two to ten hours, they were placed in the sea water which isotope was not added and then they were washed. The localization of P32 in the mantle is illustrated in Fig. 1A, 2 and 3. Fig. 1A shows that P32 is distributed in the periphery of the mantle. Examination of Fig. 2 and 3 which is a photograph of the periphery of the mantle taken at higher magnification, shows that P32 is localized basophilic gland in the mantle. Table 1. shows the distribution of P32 in each position of the mantle. Fig. 4A shows the localization of Ca45 in the periphery of the mantle, radioautograph of the tissue section of the mantle will be published in near future.
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