Aglaonema commutatum Schott (Araceae) leaf growth under limited light environments. Effect of plant size

The effect of plant size (estimated as total dry weight) on leaf growth of Aglaonema commutatum Schott was studied under limited light conditions. Two different plant sizes were used. A significant positive regression was found between leaf area and plant size. However, distinct slope values were detected after production and complete expansion of three new leaves. Despite greater leaf size, there were no significant differences in leaf thickness and leaf tissue distribution between leaves expanded under high- (previous leaves) or low-light for both plant sets. We propose that for a long time under limited light, a decrease in Aglaonema commutatum leaf size would be associated to a reduced photosynthate translocation capacity of the resources stored in other plant organs. The effect of these results on ornamental industry is discussed too. Additional keywords: Acclimation; leaf anatomy; ornamentals; shade leaves.