The aim of this work was to find out how the sugars in the endosperm of oilseed rape contribute to the flux of oil synthesis. While the hexose content of the liquid endosperm decreased during development the sucrose content increased. It is important to understand the relative rates of use of the endosperm sugars for two reasons. Firstly we need to know which sugars are used, and at what stages in development, in order to understand the roles of enzymes involved in their metabolism. Secondly, changes in sugar concentration have been implicated in the regulation of expression of genes determining storage-product synthesis [see Weber, Borisjuk and Wobus (1997) Trends Plant Sci. 2, 169–174, for review]. The rate of consumption of sugar is one factor governing its concentration. We present data showing both the concentration-dependence of conversion of sugar to oil, and the in vivo concentrations of sugars; we relate these data sets to each other and discuss the effects of the intracellular pool of sucrose. Glucose, fructose and sucrose are all substrates for oil synthesis, but the rates of their use (particularly sucrose) are underestimated because of dilution by sucrose from the intracellular pool.
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Conference Article|
December 01 2000
Carbon supply for storage-product synthesis in developing seeds of oilseed rape
L. M. Hill;
L. M. Hill
1
1Brassica and Oilseeds Research Department, John Innes Centre, Colney Lane, Norwich NR4 7UH, U.K.
1To whom correspondence should be addressed (e-mail lionel.hill@bbsrc.ac.uk)
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S. Rawsthorne
S. Rawsthorne
1Brassica and Oilseeds Research Department, John Innes Centre, Colney Lane, Norwich NR4 7UH, U.K.
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Publisher: Portland Press Ltd
Received:
June 26 2000
Online ISSN: 1470-8752
Print ISSN: 0300-5127
© 2000 Biochemical Society
2000
Biochem Soc Trans (2000) 28 (6): 667–669.
Article history
Received:
June 26 2000
Citation
L. M. Hill, S. Rawsthorne; Carbon supply for storage-product synthesis in developing seeds of oilseed rape. Biochem Soc Trans 1 December 2000; 28 (6): 667–669. doi: https://doi.org/10.1042/bst0280667
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