Der einflub von cycloheximid und chloramphenicol auf die biosynthese der photosynthese-pigmente in cyanophora paradoxa korsch. III. chlorophyll a undphycochromoproteide / The influence of cycloheximide and chloramphenicol on the biosynthesis of the photosvnthetic pigments in cyanophora paradoxa. III. chlorophyll a and phycochromoproteids
2014
Neu-Müller, Margarete | Schenk, Hainfried E. A.
The inhibition effects of CHI and CA on the biosynthesis of the tetrapyrrolpigments were measured with two methods (in vivo VIS-spectroscopy, for chlorophyll (Chi) and the phycochromoproteids, ¹⁴C incorporation only for Chi). In the case of the Chl-biosynthesis both methods show the same results: a) In vivo VIS-spectroscopy demonstrates that the inhibition effect of CA manifests faster than that of CHI, b) during the ¹⁴C incorporation into Chi chloramphenicol (CA) inhibits more than cyclohexim ide (CHI) in contrary to the behaviour of chloroplasts. It seems that the CHI caused decrease of ¹⁴C incorporation into Chi can be ascribed to the decreased photosynthesis. The influence o f the antibiotics of the phycochrom oproteids is similar to that observed for chlorophyll. It is remarkable that under the influence of CHI the phycochromoproteid biosynthesis is significantly better than under CA influence, although CHI damages the consortium more than CA. That can be interpreted, as for chlorophyll, with a more endocytobiont coded phycochrom oproteid synthesis
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