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DNA MICROSPECTROPHOTOMETRY OF SHOOT APICAL MERISTEM CELL POPULATIONS IN CERATOPTERIS THALICTROIDES (FILICALES)
Author(s) -
Polito Vito S.
Publication year - 1980
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.1537-2197.1980.tb07651.x
Subject(s) - biology , meristem , fern , dna , mitosis , nuclear dna , botany , apical cell , cell , shoot , microbiology and biotechnology , genetics , mitochondrial dna , gene
A microspectrophotometric analysis of the DNA content of cell populations in the shoot apical meristem of young and adult stages of the filicalean fern Ceratopteris thalictroides was conducted to determine if the previously reported uptake of labeled DNA precursors by the apical cell was a consequence of endomitotic DNA replication or of DNA synthesis preceeding mitosis. Results demonstrate that in both the young and adult plants the estimated DNA content of the apical cell nuclei parallels that of the other cells of the meristem. There was no evidence of an “apical zone” of endopolyploid cells.