摘要：We studied the growth of Anabaena fertilissima under graded CO 2 and temperature conditions to assess its suitability as a CO 2 scavenger for carbon recycling. A. fertilissima reached maximum growth at 6% CO2, but growth declined above this CO 2 level; yet, at no CO 2 concentration growth was less than that at ambient CO 2 . High temperature (>30°C) reduced growth of the cyanobacterium, but presence of elevated (6%) CO 2 lessened the intensity of that reduced growth. High temperature also reduced biomass, pigments, total protein, and nitrogen fixation, but elevated CO 2 significantly moderated this negative effect. Elevated CO 2 reduced 14 CO 2 uptake by 50% at 30°C and >44% at higher temperatures compared to uptake at ambient CO 2 at 30°C. Similarly, carbonic anhydrase activity also showed inhibition at high CO 2 .
