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SEPTUM FORMATION IN THE GREEN ALGA ULOTHRIX PALUSALSA (CHLOROPHYTA, ULVOPHYCEAE)
Author(s) -
Segaar P. J.,
Lokhorst G. M.
Publication year - 1987
Publication title -
acta botanica neerlandica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.871
H-Index - 87
eISSN - 1438-8677
pISSN - 0044-5983
DOI - 10.1111/j.1438-8677.1987.tb01963.x
Subject(s) - cleavage furrow , cleavage (geology) , cytokinesis , mitosis , ultrastructure , microtubule , chlorophyta , microbiology and biotechnology , ulvophyceae , biology , chemistry , cell division , botany , algae , cell , paleontology , fracture (geology) , genetics
SUMMARY The ultrastructure of cell division, with the emphasis on septum formation, is described in the ulvophycean green alga Ulothrixpalusalsa Lokhorst. Septum formation involves a cleavage furrow which is initiated before the onset of mitosis. The development of the cleavage furrow is most pronounced at the final mitotic stages when it shows a serial arrangement of alternating thickened and flattened parts. Especially in the chloroplast region, a hoop of microtubules is sometimes associated with the leading edge of the cleavage furrow.