Interactive effects of CO₂, temperature, and nitrate limitation on the growth and physiology of strain CCMP 1334 of the marine cyanobacterium Synechococcus (Cyanophyceae).

ABSTRACT: The marine cyanobacterium Synecococcus sp. (CCMP 1334) was grown in a continuous culture system on a 12:12 h light:dark cycle at all combinations of low and high pCO₂ (400 and 1000 ppmv, respectively), nutrient availability (nitrate-limited and nutrient-replete conditions), and temperatures of 21, 24, 28, 32, and 35°C. The maximum nutrient-replete growth rate was ~1.15 day^-1 at 32-35°C. Median nutrient-replete growth rates were higher at 1000 ppmv than at 400 ppmv pCO₂ at all temperatures. Carbon:nitrogen ratios were independent of pCO₂ at a fixed relative growth rate (i.e., growth rate ÷ nutrient-replete growth rate) but decreased with increasing temperature. Carbon:chlorophyll a ratios were decreased monotonically with increasing temperature an

SUBMITTER: Sharbaugh AK 

PROVIDER: S-EPMC11914933 | biostudies-literature | 2025 Feb

REPOSITORIES: biostudies-literature