Enzymes of Intermediary Metabolism in the Aleurone Cells of Germinating Wheat
- 1 June 1975
- journal article
- Published by Oxford University Press (OUP) in Journal of Experimental Botany
- Vol. 26 (3) , 399-410
- https://doi.org/10.1093/jxb/26.3.399
Abstract
Several enzymes of the glycolysis-gluconeogenesis sequence, the pentose cycle, the tricarboxylic acid cycle, and the electron transport chain, were studied in the aleurone tissue of germinating Triticum vulgare. Since all the enzymes are located either in the cytosol or in mitochondria, they acted as parameters of the development of metabolic capacity in these compartments during germination. Each of the enzymes studied was present in the aleurone tissue of the ungerminated grain. After 12 – 18 h germination, the level of each enzyme began to increase, following a sigmoidal course which levelled off by the fourth day. This pattern of enzyme development in the aleurone tissue was independent of the presence of the embryo, and, therefore, of hormonal control from that tissue (in contrast to the glyoxysomal enzymes). Studies using metabolic inhibitors indicated that the developments of the different cytosolic enzyme activities were dependent to different degrees upon RNA and protein synthesis.Keywords
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