TY - JOUR
AU - Ladygina, L. V.
PY - 2022/06/07
Y2 - 2024/04/17
TI - Growth of the cryptophyte microalga Rhodomonas salina (Wislouch) D. R. A. Hill & R. Wetherbee, 1989 under different cultivation conditions
JF - Marine Biological Journal
JA - mbj
VL - 7
IS - 2
SE - Scientific communications
DO - 10.21072/mbj.2022.07.2.05
UR - https://marine-biology.ru/mbj/article/view/342
SP - 63-71
AB - <p>Temperature and irradiance effect was studied on the specific growth rate and biomass accumulation of the cryptophyte alga <em>Rhodomonas salina</em>. Optimal conditions for its cultivation were determined allowing to obtain the maximum biomass. <em>R. salina</em> was cultivated on the Conway medium (in our own modification) at a temperature of (20 ± 1), (24 ± 1), and (28 ± 1) °C and irradiance of 13, 67, 135, and 202 μmol photons·m<sup>−2</sup>·s<sup>−1</sup>. As shown, an increase in temperature up to above-optimal values resulted in a decrease of the microalga growth rate and biomass. For <em>R. salina</em>, there were no significant differences in growth rates at irradiance of 135 and 202 μmol photons·m<sup>−2</sup>·s<sup>−1</sup> (μ values were of (0.69 ± 0.04) and (0.64 ± 0.02) day<sup>−1</sup>, respectively). The microalga growth slowed down at low irradiance (13 μmol photons·m<sup>−2</sup>·s<sup>−1</sup>) (μ value was of (0.33 ± 0.03) day<sup>−1</sup>). The maximum biomass [(3.74 ± 0.28) g·L<sup>−1</sup>] was obtained at the optimal temperature [(24 ± 1) °C] and irradiance of 135 μmol photons·m<sup>−2</sup>·s<sup>−1</sup>. Under optimal cultivation conditions, maximum accumulation of proteins was registered at the exponential growth phase (29 %), and maximum accumulation of lipids was recorded at the stationary phase (41 %).</p>
ER -