Leaf senescence in a non-yellowing mutant of Festuca pratensis

摘要: The lipid compositions of leaves from Festuca pratensis cv. Rossa (yellowing) were compared with those a non-yellowing mutant, Bf 993. 993 contained higher level acyl lipids on both fresh-weight and dry-weight basis. Diacylgalactosylglycerol, diacylgalabiosylglycerol phosphatidylinositol relatively enriched in the mutant while phosphatidylcholine was reduced. There no differences fatty-acid individual between two varieties. During senescence, progressively degraded over an 8-d period. In contrast little degradation observed during first 4 d. results support hypothesis that slower senescence changes may be due, part, to altered membrane composition.