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Dramatic mitotic response in planarians after feeding, and a hypothesis for the control mechanism

✍ Scribed by Baguñà, Jaume

Book ID: 102335214
Publisher: John Wiley and Sons
Year: 1974
Tongue: English
Weight: 252 KB
Volume: 190
Category: Article
ISSN: 0022-104X
DOI: 10.1002/jez.1401900111

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✦ Synopsis

Abstract

Using a new technique to stain and count planarian mitotic cells, a very rapid increase in neoblast mitotic activity has been found following feeding. The increase becomes visible 1 hour after feeding, reaches a maximum in 3–8 hours, and lasts for almost a week. These results suggest that a substantial proportion of neoblasts in the intact worm must be in the G2 phase ready to enter mitosis. The fact that the mitotic figures occur throughout the parenchyma also suggests that the stimulus may be of a neurohumoral kind.

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