THE LIFE HISTORY OF COLEOCHAETE SCUTATA (CHLOROPHYCEAE) STUDIED BY A FEULGEN MICROSPECTROPHOTOMETRIC ANALYSIS OF THE DNA CYCLE 1, 2
1976; Wiley; Volume: 12; Issue: 1 Linguagem: Inglês
10.1111/j.1529-8817.1976.tb02822.x
ISSN1529-8817
AutoresArchibald W. Hopkins, Gordon E. McBride,
Tópico(s)Fern and Epiphyte Biology
ResumoSUMMARY The life history of Coleochaete scutata Bréb. was analyzed by Feulgen microspectrophotometry, a technique measuring DNA content in individual nuclei. By correlating nuclear DNA content with morphological structures or stages in the life history, changes in ploidy level are revealed. The microspectrophotometric study confirmed the earlier reports of a haploid vegetative thallus with mitotic division restricted primarily to the margin of the thallus. In the mitotic cycle the G 1 (pre‐synthesis) phase is longer in duration than the synthesis find G 2 (post‐synthesis) phases. Oogamous sexual reproduction results in resistant oospores which attain DNA levels of 2C 8C (1C being the DNA level of gamete nuclei).
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