ISSN:
1432-2048
Keywords:
Helianthus
;
Microsome
;
Oil body
;
Oleate desaturation
;
Seed (fatty acids)
;
Triacylglycerol metabolism
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Abstract For the first time, an active fatty-acid metabolism is indicated for triacylglycerols (TAG) of developing sunflower (Helianthus annuus L.) seeds. When the developing seeds were transferred to low temperature, the total amount of oleate found in TAG decreased as that of linoleate increased, while the contents of total lipids and TAG remained unchanged. These results suggest that oleate from TAG was used for desaturation. This occurred first in microsomal TAG, but after a long cold period it was observed mainly in the oil-body fraction. Thesn-2 position of TAG was preferentially enriched in linoleate. Apparently, more linoleate than necesary for the maintenance of membrane fluidity was synthesized at the expense of TAG oleate.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF02411550
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