Some Effects of Applied Gibberellic Acid on the Synthesis and Degradation of Lipids in Isolated Barley Aleurone Layers

An analysis of the lipids in isolated barley (Hordeum vulgare L.) aleurone layers after 12 hours incubation in the presence or absence of gibberellic acid showed no quantitative or qualitative changes. Longer incubation periods resulted in some lipid degradation which was greater in the presence of 1 mum gibberellic acid.Glycerolipid synthesis was measured in isolated barley aleurone layers during the first 12 hours of incubation in the presence or absence of gibberellic acid by following the incorporation of (3)H-glycerol. No significant effect of the hormone was found on either the incorporation of glycerol into lipids or on the types of lipid being synthesized.