Effects of Benzyladenine on Chlorophyll, DNA, RNA and Protein Content of Attached Young Bean (Phaseolus vulgaris L.) Leaves

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Abstract
N6-Benzyladenine (BA) was applied to intact bean (Phaseolus vulgaris L.) primary leaves at 2 and 6 days after imbibition, when they were in the cell division and post-cell division stages, respectively. BA treatment at day 2 temporarily inhibited an increase in chlorophyll content in the following day, but stimulated it in later days. No such inhibition by BA was observed for changes with time in DNA, RNA, and protein content and f. wt. On the other hand, BA treatment at day 6 enhanced RNA and protein content, without significant influence on DNA and chlorophyll content and f. wt. The mode of cytokinin action on greening in leaves during cell-division growth seems to be different from that in etiolated cotyledons.