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. 1991 Mar;95(3):909–916. doi: 10.1104/pp.95.3.909

Acyl Chain and Head Group Regulation of Phospholipid Catabolism in Senescing Carnation Flowers 1

Jacqueline H Brown 1, James A Chambers 1, John E Thompson 1
PMCID: PMC1077623  PMID: 16668071

Abstract

Microsomal membranes from the petals of senescing carnation (Dianthus caryophyllus L.) flowers contain phosphatidylcholine, phosphatidylethanolamine, phosphatidylglycerol, and phosphatidylinositol. These phospholipid classes decline essentially in parallel during natural senescence of the flower and when microsomal membranes isolated from young flowers are aged in vitro. However, measurements of changes in the endogenous molecular species composition of microsomal phospholipids during natural senescence of the flower petals and during in vitro aging of isolated membranes have indicated that the various molecular species of phospholipids have quite different susceptibilities to catabolism. Acyl chain composition and the nature of the head group are both determinants of their susceptibility to catabolism. As well, a comparison of the phospholipid catabolism data for naturally senesced membranes and for membranes aged in vitro suggests that the phospholipid composition of membranes is continuously altered during senescence by acyl chain desaturation and possibly retailoring so as to generate molecular species that are more prone to catabolism. The results collectively indicate that provision of particular molecular species of phospholipids with increased susceptibility to degradation contributes to enhanced phospholipid catabolism in the senescing carnation petal.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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