TY  - JOUR
A1  - Döhler, Günter
T1  - Einfluß von Sauerstoff auf die photosynthetische CO2-Fixierung von Synechococcus
T1  - Effect of oxygen on photosynthetic CO2 fixation of synechococcus
T2  - Zeitschrift für Naturforschung, C
N2  - 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.
KW  - 14CO2 Fixation
KW  - Effect of Oxygen and CO2 Concentrations
KW  - Synechococcus
Y1  - 2014
UR  - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/71384
UR  - https://nbn-resolving.org/urn:nbn:de:hebis:30:3-713840
SN  - 0939-5075
SN  - 1865-7125
VL  - 36.1981
IS  - 1-2
SP  - 93
EP  - 97
PB  - Verlag der Zeitschrift für Naturforschung
CY  - Tübingen
ER  -