Disturbed sugar metabolism in a fully habituated nonorganogenic callus of Beta vulgaris (L.) |
| |
Authors: | Badia Bisbis Frédérik le Dily Claire Kevers Jean-Pierre Billard Claude Huault Thomas Gaspar |
| |
Institution: | (1) Hormonologie fondamentale et appliquée, Institut de Botanique B 22, Sart Tilman, B-4000 Liège, Belgique;(2) Laboratoire de Physiologie et de Biochimie Végétales, associé I.N.R.A., Institut de Recherche en Biologie Appliquée, Université de Caen, F-14032 Caen, France |
| |
Abstract: | Habituated (H) nonorganogenic sugarbeet callus was found to exhibit a disturbed sugar metabolism. In contrast to cells from normal (N) callus, H cells accumulate glucose and fructose and show an abnormal high fructose/glucose ratio. Moreover, H cells which have decreased wall components, display lower glycolytic enzyme activities (hexose phosphate isomerase and phosphofructokinase) which is compensated by higher activities of the enzymes of the hexose monophosphate pathway (glucose-6-phosphate dehydrogenase and 6-phosphogluconate dehydrogenase). The disturbed sugar metabolism of the H callus is discussed in relation to a deficiency in H2O2 detoxifying systems.Abbreviations 6PG-DH
6-phosphogluconate dehydrogenase
- G6P-DH
glucose-6-phosphate dehydrogenase
- H
fully habituated callus
- HK
hexokinase
- HMP
hexoses monophosphate
- HPI
hexose phosphate isomerase
- N
normal callus
- PFK
phosphofructokinase |
| |
Keywords: | Beta vulgaris glycolysis hexose monophosphate pathway sugarbeet sugar metabolism |
本文献已被 SpringerLink 等数据库收录! |
|