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. 1978 Mar;61(3):469–471. doi: 10.1104/pp.61.3.469

Light Modulation of the Activity of Carbon Metabolism Enzymes in the Crassulacean Acid Metabolism Plant Kalanchoë 1

Vimal K Gupta 1,2, Louise E Anderson 1,3
PMCID: PMC1091891  PMID: 16660316

Abstract

When intact Kalanchoë plants are illuminated NADP-linked malic dehydrogenase and three enzymes of the reductive pentose phosphate pathway, ribulose-5-phosphate kinase, NADP-linked glyceraldehyde-3-phosphate dehydrogenase, and sedoheptulose-1,7-diphosphate phosphatase, are activated. In crude extracts these enzymes are activated by dithiothreitol treatment. Light or dithiothreitol treatment does not inactivate the oxidative pentose phosphate pathway enzyme glucose-6-phosphate dehydrogenase. Likewise, neither light, in vivo, nor dithiothreitol, in vitro, affects fructose-1,6-diphosphate phosphatase. Apparently the potential for modulation of enzyme activity by the reductively activated light effect mediator system exists in Crassulacean acid metabolism plants, but some enzymes which are light-dark-modulated in the pea plant are not in Kalanchoë.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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