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.
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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
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Bisbis, B., le Dily, F., Kevers, C. et al. Disturbed sugar metabolism in a fully habituated nonorganogenic callus of Beta vulgaris (L.). Plant Growth Regul 13, 257–261 (1993). https://doi.org/10.1007/BF00024846
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DOI: https://doi.org/10.1007/BF00024846