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ZONATION IN THE APICAL CELL OF ZONARIA
Author(s) -
Neushul M.,
Dahl A. L.
Publication year - 1972
Publication title -
american journal of botany
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.218
H-Index - 151
eISSN - 1537-2197
pISSN - 0002-9122
DOI - 10.1002/j.1537-2197.1972.tb10110.x
Subject(s) - biology , cytoplasm , apical cell , meristem , ultrastructure , intracellular , polar cap , microbiology and biotechnology , botany , polar , cell , genetics , physics , astronomy , shoot
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.