ZONATION IN THE APICAL CELL OF ZONARIA |
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Authors: | M. Neushul A. L. Dahl |
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Affiliation: | Department of Biological Sciences, University of California, Santa Barbara, 93106 |
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Abstract: | Light and electron microscopic techniques were used to study the row of apical cells that form the meristem of the dictyotalean brown alga, Zonaria farlowii. A distinctly polar pattern occurs in the cells. Four ultrastructurally different cytoplasmic zones have been seen: an apical zone, a nuclear zone, a compound vacuolar zone, and a vegetative zone. The apical cell of Zonaria is a differentiating cytoplasmic unit where striking intracellular gradients occur. |
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