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Reversal of polarity in ciliated cells of the isolated sea urchin pluteus gut

✍ Scribed by Amemiya, Shonan ;Akasaka, Kohji ;Terayama, Hiroshi

Publisher: John Wiley and Sons
Year: 1979
Tongue: English
Weight: 336 KB
Volume: 210
Category: Article
ISSN: 0022-104X
DOI: 10.1002/jez.1402100120

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✦ Synopsis

Abstract

Guts isolated from pluteus embryos of Hemicentrotus pulcherrimus were observed by scanning electron microscopy in the course of 24 h culturing in normal sea water. They showed marked morphological changes such as disappearance of the regional features, closure of the endings (oral and anal), and reappearance of the regional features corresponding to the stomach and esophagus (but lacking the intestinal and pharyngeal regions). In parallel to the above morphological changes, the cilia usually associated with the interior surface of isolated guts disappeared and new cilia appeared on the exterior surface of the isolated guts, causing the isolated guts swim around by the end of the culture period. These results suggest the reversion of cellular polarity in the isolated gut wall in response to the environmental change.

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