Einfluß von Sauerstoff auf die photosynthetische CO₂-Fixierung von Synechococcus
Effect of oxygen on photosynthetic CO₂ fixation of synechococcus
- The cyanobacterium Synechococcus (Anacystis nidulans strain L 1402-1) was grown at +35 °C in air and in air enriched with 2.2 vol.% CO2. The effect of different oxygen concentrations (0, 2, 20, 50, 75 and 99.97 or 97.8 vol.%) was studied in low (0.03 vol.%) and high (2.2 vol.%) CO2 concentrations at + 35 °C. After exposure to a nitrogen atmosphere and low CO2 content I4C-bicarbonate was mainly incorporated into aspartate and glycine/serine. During oxygenic photosynthetic CO2 fixation label in aspartate decreased and a high degree of radioactivity could be found in 3-phosphoglyceric acid and sugar monophosphates. The Calvin cycle was the main fixing pathway in 2.2 vol.% CO2 during anoxygenic and oxygenic conditions independent on the O2 concentrations during the experiments. No oxygen enhancement of photosynthetic CO2 fixation could be found. Possible mechanism involved in CO2 fixation pathways and glycolate metabolism underlying the effect of oxygen was discussed.
Author: | Günter DöhlerGND |
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URN: | urn:nbn:de:hebis:30:3-713840 |
DOI: | https://doi.org/10.1515/znc-1981-1-218 |
ISSN: | 0939-5075 |
ISSN: | 1865-7125 |
Parent Title (German): | Zeitschrift für Naturforschung, C |
Publisher: | Verlag der Zeitschrift für Naturforschung |
Place of publication: | Tübingen |
Document Type: | Article |
Language: | German |
Date of Publication (online): | 2014/06/02 |
Year of first Publication: | 1981 |
Publishing Institution: | Universitätsbibliothek Johann Christian Senckenberg |
Release Date: | 2024/01/29 |
Tag: | 14CO2 Fixation; Effect of Oxygen and CO2 Concentrations; Synechococcus |
Volume: | 36.1981 |
Issue: | 1-2 |
Page Number: | 5 |
First Page: | 93 |
Last Page: | 97 |
Institutes: | Biowissenschaften |
Dewey Decimal Classification: | 5 Naturwissenschaften und Mathematik / 57 Biowissenschaften; Biologie / 570 Biowissenschaften; Biologie |
Sammlungen: | Universitätspublikationen |
Licence (German): | Creative Commons - Namensnennung-Nicht kommerziell-Keine Bearbeitung 3.0 |