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- Publisher
- Springer Journals
- Copyright
- Copyright © 2000 by MAIK “Nauka/Interperiodica”
- Subject
- Life Sciences; Biochemistry, general; Microbiology; Medical Microbiology
- ISSN
- 0003-6838
- eISSN
- 1608-3024
- DOI
- 10.1007/BF02737921
- Publisher site
- See Article on Publisher Site
Abstract
Low doses of the exogenous flavonoid quercetin increased the content of sugars in tomato fruits of various cultivars. The content of glucose in tomato fruits of cv.Ukrainskii teplichnyi increased from 3.62 to 11.24% per unit dry weight. Increases in the content of glucose were found in all tomato cultivars examined. An analysis of qualitative and quantitative compositions of amino acids showed that their levels were markedly decreased in fruits of quercetin-treated plants. Our studies and data found in the literature suggest that this effect is due to the synthesis of sugars from amino acids by gluconeogenesis. The reverse process of sugar hydrolysis does not occur because exogenous quercetin inhibits the activity of pyruvate kinase.
Journal
Applied Biochemistry and Microbiology – Springer Journals
Published: Oct 27, 2007