Summary
Bundle-sheath cells isolated by the grinding and filtration procedure of Edwards and Black (1971b) from species of plants having the C4-dicarboxylic acid pathway of photosynthesis were tested for the decarboxylation of malate from the C4-carboxyl position. The bundle-sheath cells, which showed high malic enzyme activity in extracts, decarboxylated 4[14C]malate at rates sufficient to be involved in photosynthesis. The malate decarboxylation is dependent on the addition of magnesium or manganese and NADP+. The activity was increased by raising the temperature from 30 to 50°. The evidence supports the idea that malate may be a carboxyl donor to the reductive pentose-phosphate cycle in bundle-sheath cells in certain C4-dicarboxylic acid pathway plants such as Zea mays L., Sorghum bicolor L., and Digitaria sanguinalis (L.) Scop.
Similar content being viewed by others
Abbreviations
- C4 pathway:
-
C4-dicarboxylic acid pathway
- RPP pathway:
-
reductive pentose phosphate pathway
- C4 plants:
-
plants having the C4 and the RPP pathways
- C3 plants:
-
plants having only the RPP pathway
- R5P:
-
ribose-5-phosphate
- HEPES:
-
N-2-hydroxyethylpiperazine-N-2-ethanesulfonic acid
- Tricine:
-
N-tris-(hydroxymethyl)methylglycine
References
Andrews, T. J., Johnson, H. S., Slack, C. R., Hatch, M. D.: Malic enzyme and aminotransferases in relation to 3-phosphoglycerate formation in plants with the C4-dicarboxylic acid pathway of photosynthesis. Phytochemistry 10, 2005–2013 (1971).
Berry, J. A.: The compartmentation of reactions in β-carboxylation photosynthesis. Carnegie Instn. Yrbk. 69, 649–655 (1971).
Berry, J. A., Downton, W. J. S., Tregunna, E. B.: The photosynthetic carbon metabolism of Zea mays and Gomphrena globosa: the location of the CO2 fixation and the carboxyl transfer reactions. Canad. J. Bot. 48, 777–786 (1970).
Downton, W. J. S.: Preferential C4-dicarboxylic acid synthesis, the postillumination CO2 burst, carboxyl transfer step, and grana configuration in plants with C4-photosynthesis. Canad. J. Bot. 48, 1795–1800 (1970).
Edwards, G. E., Black, C. C.: Photosynthesis in mesophyll cells and bundle sheath cells isolated from Digitaria sanguinalis (L.) Scop. leaves. In: Photosynthesis and photorespiration, p. 153–168, M. D. Hatch, C. B. Osmond, R. O. Slatyer, eds. New York: Wiley-Interscience 1971a.
Edwards, G. E., Black, C. C.: Isolation of mesophyll cells and bundle sheath cells from Digitaria sanguinalis (L.) leaves and a scanning microscopy study of the internal leaf cell morphology. Plant Physiol. 47, 149–156 (1971b).
Edwards, G. E., Kanai, R., Black, C. C.: Phosphoenolpyruvate carboxykinase in leaves of certain plants which fix CO2 by the C4-dicarboxylic acid pathway of photosynthesis. Biochem. biophys. Res. Commun. 45, 278–285 (1971c).
Edwards, G. E., Lee, S. S., Chen, T. M., Black, C. C.: Carboxylation reactions and photosynthesis of carbon compounds in isolated mesophyll and bundle sheath cells of Digitaria sanguinalis (L.) Scop. Biochem. biophys. Res. Commun. 39, 389–395 (1970).
Greenway, H., Osmond, C. B.: Salt responses of enzymes from species differing in salt tolerance. Plant Physiol. 49, 256–259 (1972).
Hatch, M. D.: Mechanism and function of the C4 pathway of photosynthesis. In: Photosynthesis and photorespiration, p. 139–152, M. D. Hatch, C. B. Osmond, R. O. Slatyer, eds. New York: Wiley-Interscience 1971.
Hatch, M. D., Slack, C. R.: Photosynthesis by sugarcane leaves. A new carboxylation reaction and the pathway of sugar formation. Biochem. J. 101, 103–111 (1966).
Johnson, H. S., Hatch, M. D.: Distribution of the C4-dicarboxylic acid pathway of photosynthesis and its occurrence in dicotyledonous plants. Phytochemistry 7, 375–380 (1968).
Johnson, H. S., Hatch, M. D.: Properties and regulation of leaf nicotinamideadenine dinucleotide phosphate-malate dehydrogenase and malic enzyme in plants with the C4-dicarboxylic acid pathway of photosynthesis. Biochem. J. 119, 273–280 (1970).
Ochoa, S.: “Malic enzyme” A. Malic enzyme from pigeon liver and wheat germ. In: Methods in enzymology, vol. 1, p. 739–748, S. P. Colowick, N. O. Kaplan, eds. New York: Acad. Press 1955.
O'Neal, D., Hew, C. S., Latzko, E., Gibbs, M.: Photosynthetic carbon metabolism of isolated corn chloroplasts. Plant Physiol. 49, 607–614 (1972).
Osmond, C. B., Greenway, H.: Salt responses of carboxylation enzymes from species differing in salt tolerance. Plant Physiol. 49, 260–263 (1972).
Samejima, M., Miyachi, S.: Light-enhanced dark carbon dioxide fixation in maize leaves. In: Photosynthesis and photorespiration, p. 211–217, M. D. Hatch, C. B. Osmond, R. O. Slatyer, eds. New York: Wiley-Interscience 1971.
Slack, C. R., Hatch, M. D., Goodchild, D. J.: Distribution of enzymes in mesophyll and parenchyma-sheath chloroplasts of maize leaves in relation to the C4-dicarboxylic acid pathway of photosynthesis. Biochem. J. 114, 489–498 (1969).
Wintermans, J. F. G. M., De Mots, A.: Spectrophotometric characteristics of chlorophyll and their pheophytins in ethanol. Biochim. biophys. Acta (Amst.) 109, 448–453 (1965).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Huber, S.C., Kanai, R. & Edwards, G.E. Decarboxylation of malate by isolated bundle-sheath cells of certain plants having the C4-dicarboxylic acid cycle of photosynthesis. Planta 113, 53–66 (1973). https://doi.org/10.1007/BF00385189
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF00385189