Table I. Growth rate, PSII reaction center protein, and pigment content of T. pseudonana and C. radiatus cells cultured at different temperatures and 30 μmol photons m−2 s−1

n = 3 to 5, ± se.

ParameterT. pseudonanaC. radiatus
12°C18°C24°C18°C24°C
μ (d−1)0.8 (±0.01)1.1 (±0.01)1 (±0.01)0.4 (±0.01)0.4 (±0.01)
Proteins(fmol μg protein−1)
 PsbA51 (±7)71 (±14.5)67 (±5)23 (±4)30 (±4)
 PsbD137 (±10)139 (±5)163 (±33)23 (±4)16 (±1)
 Chlorophyll a (fmol cell−1)0.3 (0.01)0.3 (0.01)0.3 (0.01)254 (23)299 (7)
Pigments (mol 100 mol Chl a−1)
 Fucoxanthin: Chl a48 (±1)53 (±0.5)55 (±0.3)61 (±1)63 (±1)
 β,β-Carotene: Chl a5 (±1)5 (±1)5 (±1)5 (±0.3)5 (±0.4)
Dd: Chl a12 (±0.4)10 (±0.2)11 (±0.3)7 (±0.1)8 (±0.2)