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Formation of pattern in regenerating tissue pieces of Hydra attenuata. II. Degree of proportion regulation is less in the hypostome and tentacle zone than in the tentacles and basal disc.

Abstract：

:The relative sizes of the various structures in Hydra attenuata were compared over a broad range of animal sizes to determine in detail the ability to regulate proportions during regeneration. The three components of the head, namely hypostome, tentacles, and tentacle zone from which the tentacles emerge, the body column, and the basal disc were all measured separately. Ectodermal cell number was used as the measure of size. The results showed that the basal disc proportioned exactly over a 40-fold size range, and the tentacle tissue proportioned exactly over a 20-fold size range. In contrast, the hypostome and tentacle zone proportioned allometrically . With decreasing size, the hypostome and tentacle zone became an increasing fraction of the animal at the expense of body tissue, and in the very smallest regenerates at the expense of tentacle tissue. In their current form, the reaction-diffusion models proposed for pattern regulation in hydra are not consistent with the data.

journal_name

Dev Biol

journal_title

Developmental biology

authors

Bode PM,Bode HR

doi

10.1016/0012-1606(84)90318-x

subject

Has Abstract

pub_date

1984-06-01 00:00:00

pages

304-12

issue

2

eissn

0012-1606

issn

1095-564X

pii

0012-1606(84)90318-X

journal_volume

103

pub_type

杂志文章

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