| | 1 | Author
| HainfriedE A Schenk, M. Argarete, Neu-M Üller | Requires cookie* | | | Title
| Der Einfluß von Cycloheximid und Chloramphenicol auf die Biosynthese der Photosynthese-Pigmente in Cyanophora paradoxa Korsch I. Photosynthetische Sauerstoffproduktion Photosynthetic O xygen Evolution  | | | | Abstract
| The Influence o f C yclohexim ide and C hloram phenicol on the B iosynthesis o f the Photosynthetic P igm ents in Cyanophora paradoxa I. It is not clear whether an endocytobiont is able to develop during a long evolution tim e only to an organelle like cell structure (defect m utant) with a high degree of m etabolic dependency or also to a perfect cell organelle with genetical dependency to the host nucleus (intercom partm ental translocation of proteins an d /o r gene transfer) in the sense of the Serial Endocytobiosis Hypothesis (SEH). Cyanocyta korschokoffiana, the endocyanelle of C. paradoxa, seems to be a very suitable object to answer this question. Therefore we have studied the influence o f the translation inhibitors cycloheximide (CHI) and chloramphenicol (CA) on the biosynthetic behaviour of this cyanobacterial endocytobiont regarding the photosynthetic oxygen during 20 h developing and incubation time. After dilution with fresh culture m edium the oxygen evolution of the control culture remains nearly constant, if it is related to the phycocyanin content, whereas it increases slowly to a constant level relating to the chlorophyll content (nearly 140-150% o f the starting activity). CHI and CA show a rapid effect on the oxygen evolution. At the first 8 -10 h the oxygen evolution of cultures treated with CA are hardly dim inished and rem ain m ore or less constant with regard to the starting activity, but that of cultures treated with CHI decreases strongly. After 24 h the CHI treated flagellate is photosynthetically inactive and far-reaching destroyed (microscopic observations), indicating that CHI has beside the inhibition effects on protein synthesis also secondary effects on the stability o f m em branes o f C. paradoxa. Der apochlorotische Flagellat Cyanophora | | | |
Reference
| Z. Naturforsch. 38c, 978—983 (1983); received July 19 1983 | | | |
Published
| 1983 | | | |
Keywords
| Cyanophora paradoxa, Photosynthetic Activity, Oxygen Evolution, Chlorophyll, Phycocyanin | | | |
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| default:Reihe_C/38/ZNC-1983-38c-0978.pdf | | | | Identifier
| ZNC-1983-38c-0978 | | | | Volume
| 38 | |
| 2 | Author
| Ii Carotinoide, H. Ainfried, E. A. Schenk, H. Arald, S. Transky | Requires cookie* | | | Title
| Der Einfluß von Cycloheximid und Chloramphenicol auf die Biosynthese der Photosynthese-Pigmente in Cyanophora paradoxa Korsch | | | | Abstract
| The Influence o f Cyclohexim ide and C hloram phenicol on the B iosynthesis o f the Photosynthetic Pigm ents in Cyanophora paradoxa. II. C arotenoids M argarete N eu-M üller, To prove the extent to which the endocyanelle o f C. paradoxa is autonom ous with respect to the biosynthesis o f its photosynthetic pigments, the degree, to w hich the translation inhibitors cyclohexim ide (CHI) and chloramphenicol (CA) influence the biosynthesis o f carotenoids, was | | | |
Reference
| Z. Naturforsch. 38c, 984—9 (1983); received July 19 1983 | | | |
Published
| 1983 | | | |
Keywords
| Cyanophora paradoxa, Biosynthesis, /?-Carotene, Zeaxanthin, Chlorophyll | | | |
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| default:Reihe_C/38/ZNC-1983-38c-0984.pdf | | | | Identifier
| ZNC-1983-38c-0984 | | | | Volume
| 38 | |
| 4 | Author
| M. Argarete, N. Eu-, M. Üller, H. Ainfried, E. A. Schenk | Requires cookie* | | | Title
| Der Einfluß von Cycloheximid und Chloramphenicol auf die Biosynthese der Photosynthese-Pigmente in Cyanophora paradoxa Korsch. HI. Chlorophyll a und Phycochromoproteide Chlorophyll a and Phycochrom oproteids | | | | Abstract
| The Influence o f Cyclohexim ide and C hloram phenicol on the B iosynthesis o f the P hotosynthetic P igm ents in Cyanophora paradoxa. III. The inhibition effects o f CHI and CA on the biosynthesis o f the tetrapyrrolpigments were measured with two methods (in vivo VIS-spectroscopy, for chlorophyll (Chi) and the phyco chromoproteids, 14C incorporation only for Chi). In the case o f the Chl-biosynthesis both methods show the sam e results: a) In vivo VIS-spectroscopy demonstrates that the inhibition effect o f CA manifests faster than that o f CHI, b) during the 14C incorporation into Chi chloramphenicol (CA) inhibits more than cyclohexim ide (CHI) in contrary to the behaviour o f chloroplasts. It seems that the CHI caused decrease o f l4C incorporation into Chi can be ascribed to the decreased photosynthesis. The influence o f the antibiotics o f the phycochrom o proteids is similar to that observed for chlorophyll. It is remarkable that under the influence o f 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. | | | |
Reference
| Z. Naturforsch. 38c, 990—9 (1983); received July 19 1983 | | | |
Published
| 1983 | | | |
Keywords
| Cyanophora paradoxa, Biosynthesis, Chlorophyll, Phycocyanin, Allophycocyanin, C yclohexim ide, Chloramphenicol | | | |
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| default:Reihe_C/38/ZNC-1983-38c-0990.pdf | | | | Identifier
| ZNC-1983-38c-0990 | | | | Volume
| 38 | |
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