Regulation of interstitial cell differentiation inHydra attenuata |
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Authors: | Hans R Bode G Scott Smith |
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Institution: | (1) Department of Developmental and Cell Biology, University of California, Irvine, 92717 Irvine, California, USA |
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Abstract: | Summary The axial position of interstitial-cell (i-cell) differentiation into nematocytes inHydra was studied. Nests of developing nematoblasts of three types of nematocytes were distributed in a non-uniform manner along the body column. Stenotele nematoblasts were distributed in a gradient with a maximum in the peduncle. Desmoneme and atrichous isorhiza nematoblasts were found predominantly in the upper half of the body region. These results suggest that the type of nematocyte differentiation an i-cell undergoes is influenced by the axial position of the i-cell. Because the assayed stage of nematocyte differentiation occurred 6–7 days after beginning of differentiation, the axial position of the anticedent i-cell at the time of commitment was determined by correcting for tissue displacement. |
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Keywords: | Interstitial cell Position-dependent differentiation Hydra Nematocyte |
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