Light-sensitivity of isolated pigment cells of the sea urchin Centrostephanus longispinus
Pigment cells isolated from the epithelium of the sea urchin Centrostephanus longispinus display light-sensitivity in the same manner as in normal tissue. In complete darkness they have a round to ovoid shape. On illumination a successive extension of pigment-bearing processes can be observed. Darkness leads to a successive retraction of the pseudopodia.
Key wordsAmoeboid pigment cell Colour change Echinoidea Light-sensitivity Interference contrast microscopy
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