PMID: 1212227Oct 1, 1975Paper

The induction of enzyme activity in the endosperm of germinating castor-bean seeds

The Biochemical Journal
K M Marriott, D H Northcote

Abstract

Endosperm extracts were prepared at various times during germination from intact castor-bean seeds and from seeds from which the embryos had been removed. The sterilized seeds were incubated either on solid water agar or on agar containing 0.3 mM-gibberellic acid. 2. Isocitrate lyase and 3-hydroxyacyl-CoA dehydrogenase had very low activities in the mature seeds, but increased 44-fold and 27-fold respectively during germination. In contrast, the extracts of mature seeds had considerable acid and alkaline lipase activity and this only increased two- to three-fold during the incubation period. 3. Incubation of the seeds with gibberellic acid accelerated the rate of appearance of isocitrate lyase and 3-hydroxyacyl-CoA dehydrogenase. It also increased the total activity attained. However, the application of hormone had, in comparison, little effect on the development of lipase activity. 4. The removal of the embryo had little influence on the development of enzyme activity in the endosperm tissue; only with isocitrate lyase was a decrease in activity observed in the absence of the embryo.

Citations

Oct 21, 2005·The Plant Journal : for Cell and Molecular Biology·Peter J Eastmond, Russell L Jones
Jan 1, 1978·Progress in Biophysics and Molecular Biology·P J Quinn, W P Williams
Oct 10, 2006·Plant Physiology·Kamel ChibaniPhilippe Grappin

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