Variation in Plastid Number

Abstract
Changes in the physiological state of the multiplastidic alga O. luteus result in a shift in chloroplast complement from 33-21 plastids. The effect of this induced change in organelle complement on nuclear and chloroplast DNA levels was analyzed. Data suggest that the absolute amount of chloroplast and nuclear DNA found within a cell remains constant but that the amount of chloroplast DNA per plastid is inversely proportional to the number of chloroplasts to which that DNA must be distributed.