
TY  - JOUR
A1  - Smith, Geoffrey D. 
A1  - Chazal, Nola M. de 
A1  - Tozer, Greg 
A1  - Clerk, Lucy H. 
T1  - Temperature stress and oxygen inhibition of nitrogen fixation in a <emph type="2">Nostoc</emph> cyanobacterium
JF  - Functional Plant Biology
JO  - Functional Plant Biol.
Y1  - 1998
VL  - 25
IS  - 3
SP  - 365
EP  - 370
KW  - Brown Nostoc, cyanobacterium, oxygen stress, hydrogen, oxyhydrogen respiration.
UR  - https://doi.org/10.1071/PP97149 
N2  - The effect of elevated temperature and oxygen concentration on nitrogen fixation was investigated in a Nostoc species previously isolated in Java, Indonesia. This organism grows well under nitrogen-fixing conditions at 25&#176;C and also adapts to grow at 40&#176;C. Cells grown at these temperatures responded differently to thermal stress at 48&#176;C; cells grown at 25&#176;C and stressed without oxygen at 48&#176;C were subsequently much more sensitive to oxygen than cells grown at 40&#176;C. This indicates an adaptation of the cells to growth at the higher temperature. In the presence of an adequate supply of CO2, oxygenic photosynthesis in the vegetative cells was not impaired by the thermal stress, nor was whole cell respiration. The addition of H2 substantially overcame the oxygen-inhibition for adapted cells but not for those grown at 25&#176;C. Possible causes of the thermal inactivation of nitrogen fixation are discussed. 
ER  -

