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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Bode, H.R., Scott Smith, G. Regulation of interstitial cell differentiation inHydra attenuata . Wilhelm Roux' Archiv 181, 203–213 (1977). https://doi.org/10.1007/BF00848421
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DOI: https://doi.org/10.1007/BF00848421