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Untersuchungen am Phloemexsudat von Cucurbita pepo L.

II. Enzymaktivitäten der Gluconeogenese und des Auf- und Abbaus von Di- und Polysacchariden

Studies on the phloem exudate of Cucurbita pepo L.

II. Enzyme activities of gluconeogenesis and of the synthesis and degradation of di- and polysaccharides

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Summary

Tests for enzymes of gluconeogenesis and of the synthesis and degradation of sucrose and polysaccharides have been carried out in the phloem exudate of Cucurbita pepo. All the enzymes which are necessary for the synthesis of sucrose and polysaccharides from metabolites of the citric acid cycle were found to be present in the exudate, except phosphoenolpyruvate carboxykinase. The polysaccharide synthetase was found to exhibit higher activity with glycogen (which is an unnatural polysaccharide in higher plants) than with starch. In addition, polysaccharide synthetase activity could be increased remarkably with 2 mM glucose-6-phosphate and glycogen as primer. Among the enzymes which catabolize sucrose and polysaccharides (phosphorylase, invertase, sucrose phosphorylase), only sucrose phosphorylase showed activity.

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Literatur

  • Algranati, I. D., Cabib, E.: Uridine diphosphate D-glucose-glycogen glucosyltransferase from yeast. J. biol. Chem. 237, 1007–1013 (1962)

    Google Scholar 

  • Beck, E.: Kohlenhydrat- und Säurestoffwechsel. In: Fortschritte der Botanik, Bd. 34, S. 139–154. Berlin-Heidelberg-New York: Springer 1972

    Google Scholar 

  • Bücher, Th., Luh, W., Pette, D.: Einfache und zusammengesetzte Tests mit Pyridinnucleotiden. In: Hoppe-Seyler/Thierfelder, Handbuch der physiologischen und pathologisch-chemischen Analyse, Bd. VI/A, S. 292–339, 10. Aufl., Lang, K., Lehnartz, E. (Hrsg.). Berlin-Göttingen-Heidelberg-New York: Springer 1964

    Google Scholar 

  • Chang, H. C., Lane, M. D.: The enzymatic carboxylation of phosphoenolpyruvate. II. Purification and properties of liver mitochondrical phosphoenolpyrivate carboxykinase. J. biol. Chem. 241, 2413–2420 (1966)

    Google Scholar 

  • Englemann, E. M.: Sieve elements of Impatiens sultanii. 1. Wound reactions. Ann. Bot. 29, 83–101 (1965)

    Google Scholar 

  • Esau, K., Cronshaw, J.: Plastids and mitochondria in the phloem of Cucurbita. Canad. J. Bot. 46, 877–880 (1968)

    Google Scholar 

  • Eschrich, W.: Physiologie der Siebröhrencallose. Planta (Berl.) 65, 280–300 (1965)

    Google Scholar 

  • Evert, R. F., Derr, W. F.: Callose substance in sieve elements. Amer. J. Bot. 51, 552–559 (1964)

    Google Scholar 

  • Feingold, D. S., Neufeld, E. F., Hasid, W. Z.: Synthesis of a β-1,3-linked glucan by extracts of Phaseolus aureus seedlings. J. biol. Chem. 233, 783–788 (1958)

    Google Scholar 

  • Gardner, D. C. J., Peel, A. J.: Metabolism and transport of 14C-labelled glutamic and aspartic acids in the phloem of willow. Phytochemistry 10, 2385–2387 (1971)

    Google Scholar 

  • Hiatt, H. H., Goldstein, M., Lareau, J., Horecker, B. J.: The pathsway of hexose synthesis from pyruvate in muscle. J. biol. Chem. 231, 303–307 (1958)

    Google Scholar 

  • Hoffmann-Ostenhof, O., Ehrenreich, R.: Phosphoester-Hydrolasen (Phosphoesterasen). In: Hoppe-Seyler/Thierfelder, Handbuch der physiologischen und pathologisch-chemischen Analyse, Bd. VI/B, S. 962–1009, Lang, K., Lehnartz, E. (Hrsg.). Berlin-Heidelberg-New York: Springer 1966

    Google Scholar 

  • Kennecke, M., Ziegler, H., Fekete, M. A. R. de: Enzymaktivitäten im Siebröhrensaft von Robinia pseudoacacia L. und anderer Baumarten. Planta (Berl.) 98, 330–356 (1971)

    Google Scholar 

  • Krimsky, I.: Phosphorylation of pyruvate by the pyruvate kinase reaction and reversal of glycolysis in a reconstructed system. J. biol. Chem. 234, 232–236 (1959)

    Google Scholar 

  • Lehmann, J.: Zur Lokalisation von Dehydrogenasen im Phloem von Cucurbita pepo (L.). Planta (Berl.) 111, 187–198 (1973a)

    Google Scholar 

  • Lehmann, J.: Untersuchungen am Phloemexsudat von Cucurbita pepo (L.). I. Enzymaktivitäten von Glycolyse, Gärung und Citrat-Cyclus. Planta (Berl.) 114, 41–50 (1973b)

    Google Scholar 

  • Mason, T. G., Maskell, J. E.: Studies on the transport of carbohydrates in the cotton plant. I. A study of diurnal variation in the carbohydrates of leaf, bark, and wood, and the effect of ringing. Ann. Bot. 42, 189–252 (1928)

    Google Scholar 

  • Meyerhof, O., Oesper, P.: The enzymatic equilibria of phospho(enol)pyruvate. J. biol. Chem. 179, 1371–1385 (1949)

    Google Scholar 

  • Pette, D.: Plan und Muster im zellulären Stoffwechsel. Naturwissenschaften 52, 597–616 (1965)

    Google Scholar 

  • Pfannemüller, B.: Phosphorylasen. In: Hoppe-Seyler/Thierfelder, Handbuch der physiologischen und pathologisch-chemischen Analyse, Bd. VI/B, S. 225–253, 10. Aufl. Lang, K., Lehnartz, E. (Hrsg.). Berlin-Heidelberg-New York: Springer 1966

    Google Scholar 

  • Rohdewald, M.: Phosphat-übertragende Enzyme (Transphosphatasen). In: Hoppe-Seyler/Thierfelder, Handbuch der physiologischen und pathologisch-chemischen Analyse, Bd. VI/B, S. 528–710, 10. Aufl., Lang, K., Lehnartz, E. (Hrsg.). Berlin-Heidelberg-New York: Springer 1966

    Google Scholar 

  • Schumacher, W.: Die Fernleitung der Stoffe im Pflanzenkörper. In: Handbuch der Pflanzenphysiologie, Bd. XIII, S. 61–177, Ruhland, W. (Hrsg.). Berlin-Heidelberg-New York: Springer 1967

    Google Scholar 

  • Utter, M. F.: Oxalacetic decarboxylase and related enzymes. In: Hoppe-Seyler/Thierfelder, Handbuch der physiologischen und pathologisch-chemischen Analyse, Bd. VI/C, S. 498–502, 10 Aufl., Lang, K., Lehnartz, E. (Hrsg.). Berlin-Heidelberg-New York: Springer 1966

    Google Scholar 

  • Utter, M. F., Kurahashi, K.: Mechanisms of action of oxalacetic carboxylase. J. biol. Chem. 207, 821–841 (1954)

    Google Scholar 

  • Walker, T. S., Thaine, R.: Proteins and fine structural components in exudate from sieve tubes in Cucurbita pepo stems. Ann. Bot. 35, 773–790 (1971)

    Google Scholar 

  • Wallenfels, K., Dieckmann, H.: Glykosyl-Transferasen mit Nucleosiddiphosphat-Zuckern als Donatoren. In: Hoppe-Seyler/Thierfelder, Handbuch der physiologischen und pathologisch-chemischen Analyse, Bd. VI/C, S. 292–305, 10. Aufl., Lang, K., Lenartz, E. (Hrsg.). Berlin-Heidelberg-New York: Springer 1966

    Google Scholar 

  • Webb, K. L., Burley, J. W.: Stachyose translocation in plants. Plant Physiol. 39, 973–977 (1964)

    Google Scholar 

  • Zimmermann, M. H.: Movement of organic substances in trees. Science 133, 73–79 (1961)

    Google Scholar 

  • Zimmermann, M. H.: Translocation velocity and specific mass transfer in the sieve tubes of Fraxinus americana L. Planta (Berl.) 84, 272–278 (1969)

    Google Scholar 

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Lehmann, J. Untersuchungen am Phloemexsudat von Cucurbita pepo L.. Planta 114, 51–61 (1973). https://doi.org/10.1007/BF00390284

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  • DOI: https://doi.org/10.1007/BF00390284

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