ULTRASTRUCTURE OF BLASTOCOEL MATERIAL IN BLASTULAS AND GASTRULAE OF THE SEA-URCHIN LYTECHINUS-PICTUS

被引:52
作者
KATOW, H
SOLURSH, M
机构
[1] Department of Zoology, University of Iowa, Iowa, Iowa
来源
JOURNAL OF EXPERIMENTAL ZOOLOGY | 1979年 / 210卷 / 03期
关键词
D O I
10.1002/jez.1402100320
中图分类号
Q95 [动物学];
学科分类号
071002 ;
摘要
The ultrastructure of blastocoelic material in blastulae and gastrulae of the sea urchin Lytechinus pictus was revealed by transmission and scanning electron microscopy. The blastocoel of blastulae contained 30 nm diameter granules, aggregated in long chains. In gastrulae, on the other hand, another component was present: fine fibers. The 30 nm granules were attached to the surface of these fine fibers to form a thicker, rough‐surfaced complex fibrous structure. Embryos cultured in sulfate deficient sea water had greatly reduced numbers of 30 nm granules in the blastocoel. The fine fibers appeared normal. Consequently, the 30 nm granules are selectively sensitive to sulfate deprivation. Copyright © 1979 Wiley‐Liss, Inc., A Wiley Company
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页码:561 / 567
页数:7
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