A study on senescence in tobacco leaf disks II. Chloroplast and cytoplasmic rRNAs

摘要

In tobacco leaf disks floated on water in the dark, chloroplast rRNA (23S and 16S rRNA) decreased rapidly, and this decrease was inhibited by 10−6M BA. The cytoplasmic rRNA (25S and 18S rRNA) level changed little during a few days of dark incubation regardless of the presence or absence of BA. Cycloheximide at 10−5Mcompletely removed the effect of BA. Chloroplast rRNA and cytoplasmic rRNA respectively decreased and increased during a 4-day culture in the light, and BA had no influence on these light effe