Changes in the content of condensed chromatin during the cell cycle in antheridial filaments ofChara vulgaris L. as related to DNA and RNA synthesis,3H actinomycin D binding and RNA polymerase activity

Abstract

Using light microscopic autoradiography it was found that in the middle S and G2 phases of the cell cycle in antheridial filaments (S + G2 + M type) ofChara vulgaris L., an intensified RNA synthesis took place. The process was correlated with enhanced binding of3H actinomycin D to the DNA template, increased RNA polymerase activity, and enhanced chromatin decondensation.