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MITOSIS AND CYTOKINESIS IN SESSILE SPORANGIUM OF TRENTEPOHLIA AUREA (CHLOROPHYCEAE) 1
Author(s) -
Graham Linda E.,
McBride Gordon E.
Publication year - 1978
Publication title -
journal of phycology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.85
H-Index - 127
eISSN - 1529-8817
pISSN - 0022-3646
DOI - 10.1111/j.1529-8817.1978.tb02437.x
Subject(s) - cytokinesis , biology , sporangium , phragmoplast , botany , mitosis , cell plate , microbiology and biotechnology , spore , cell division , genetics , cell
An ultrastructure study of mitosis and cytokinesis in the sessile sporangium of Trentepohlia aurea (L.) Mart, was made to clarify the phylogenetic position of the alga. Mitosis was closed and centric at late anphase with cytokinesis involving the production of cleavage membranes by dictyasames between the numerous, well‐separated daughter nuclei. Neither phycoplast nor phragmoplast microtubules were observed during cytokinesis. The lack of phycoplast microtubules and the presence of multilayered structures in flagellated cells suggest Trentepohlia is phylogenetically related to those green algae thought to have given rise to the land plants. The primitive type of mitosis and the lack of microbodies suggest that the ancestors of Trentepohlia may have branched off from this line relatively early .