title: Low Temperature-Induced GA(3) Sensitivity of Wheat : II. Changes in Lipids Associated with the Low Temperature-Induced GA(3) Sensisivity of Isolated Aleurone of Kite.
abstract: Exposure of isolated aleurone tissue from the wheat (Triticum aestivum) variety Kite which contains the Rht2 allele, to low temperature (5 degrees C) for 20 h prior to addition of exogenous GA(3), resulted in significant changes in the content of lipids, especially phospholipids. Significant low temperature-induced changes in both the head group and acyl contents of two phospholipids, phosphatidylcholine and phosphatidylethanolamine, were detected. More importantly, these changes displayed a very close temporal relationship with the low temperature-induced increase in GA(3) sensitivity. Further, this relationship was paralleled by a highly significant correlation between the changes in the phospholipids and the changes in alpha-amylase production. These results underline the possibility that the GA(3) receptor sites are membrane-based lipids.
authors: Department of Plant Physiology, Waite Agricultural Research Institute, University of Adelaide, Glen Osmond, S.A. 5064, Australia.
authors: S P
authors: SP
authors: Singh
authors: L G
authors: LG
authors: Paleg