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. 1980 Apr;65(4):631–634. doi: 10.1104/pp.65.4.631

Effect of Light on Glucose Utilization by Euglena gracilis

Paul Nicolas 1,2, Georges Freyssinet 1,2, Victor Nigon 1,2
PMCID: PMC440397  PMID: 16661253

Abstract

The effect of light on glucose consumption by wild-type Euglena gracilis Z. and mutant cells has been studied. When dark- or light-grown wild-type cells are transferred from a medium containing sodium butyrate as the only carbon source to a glucose-containing medium, glucose consumption is blocked for 6 to 7 days when cultures are incubated under a light intensity of at least 600 lux. During this time cells multiply at the same rate as controls kept on media devoid of any utilizable organic carbon source. This light-induced inhibition of glucose consumption and of growth on glucose-containing medium is not related to photosynthesis since: (a) glucose consumption is inhibited by light intensities much lower than those required for high phototrophic growth; (b) the inhibition of photosynthesis by 3-(3,4-dichlorophenyl)-1, 1-dimethylurea does not overcome the inhibition of glucose consumption; and (c) nonphototrophic-growing mutants also show light-induced inhibition of glucose consumption and of growth on glucose-containing medium. This inhibition of growth by light might be explained by modification in the permeability of the cellular membrane.

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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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