Inhibition of chloroplast development in Euglena by streptomycin: Differential inhibition of the appearance of photosynthesis in the presence of the continued synthesis of chlorophyll
- 1 January 1976
- journal article
- research article
- Published by Springer Nature in Planta
- Vol. 130 (2) , 145-149
- https://doi.org/10.1007/bf00384412
Abstract
Streptomycin effectively inhibits chloroplast development in dark-grown non-dividing Euglena gracilis when added at the onset of greening but apparently exerts a diminished effect on chlorophyll synthesis when added at later stages. We have further investigated this phenomenon and show that streptomycin added to a Euglena culture at 24 h of development has a differential inhibitory action on the extent of synthesis of several chloroplast-associated parameters. Chlorophyll, carotenoids, cytochrome 552 and photosystem I Hill activity are all slightly, if at all, inhibited and to approximately the same extent between 24 and 72 h of development. We find a very strong inhibition of both ribulose diphosphate carboxylase synthesis and photosystem II Hill activity.Keywords
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