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. 1975 Feb;55(2):390–392. doi: 10.1104/pp.55.2.390

Action of Nalidixic Acid on Chloroplast Replication in Euglena gracilis1

Harvard Lyman a, Ann S Jupp a, Ignacio Larrinua a
PMCID: PMC541622  PMID: 16659089

Abstract

The role of light in nalidixic acid bleaching of Euglena gracilis var. bacillaris was investigated. The kinetics of loss of the chloroplast-associated DNA and the sensitivity of chloroplast replication to ultraviolet light was followed during treatment with nalidixic acid. By using the mutant P4ZUL, and 3-(3,4-dichlorophenyl)-, 1-dimethylurea, it was demonstrated that the requirement for light was a functioning photosynthetic electron transport system. Ultracentifugal analysis showed a substantial decrease in chloroplast-associated DNA after 6 hours of treatment with nalidixic acid. Ultraviolet target analysis revealed that the number of chloroplast genomes per cell had been reduced. The possible role of light and implications of the reduction in chloroplast genomes for chloroplast replication are discussed.

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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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