Publication Date:
2024-03-15
Description:
Ocean acidification, due to increased levels of anthropogenic carbon dioxide, is known to affect the physiology and growth of marine phytoplankton, especially in polar regions. However, the effect of acidification or carbonation on cellular metabolism in polar marine phytoplankton still remains an open question. There is some evidence that small chlorophytes may benefit more than other taxa of phytoplankton. To understand further how green polar picoplankton could acclimate to high oceanic CO2, studies were conducted on an Antarctic Chlorella sp. Chlorella sp. maintained its growth rate (∼0.180 /day), photosynthetic quantum yield (Fv/Fm = ∼0.69) and chlorophyll a (0.145 fg/cell) and carotenoid (0.06 fg/cell) contents under high CO2, while maximum rates of electron transport decreased and non-photochemical quenching increased under elevated CO2. GCMS-based metabolomic analysis reveal that this polar Chlorella strain modulated the levels of metabolites associated with energy, amino acid, fatty acid and carbohydrate production, which could favour its survival in an increasingly acidified ocean.
Keywords:
Alkalinity, total; Alkalinity, total, standard deviation; Aragonite saturation state; Bicarbonate ion; Bicarbonate ion, standard deviation; Bottles or small containers/Aquaria (〈20 L); Calcite saturation state; Calculated using CO2SYS; Calculated using seacarb after Nisumaa et al. (2010); Carbon, inorganic, dissolved; Carbon, inorganic, dissolved, standard deviation; Carbonate ion; Carbonate system computation flag; Carbon dioxide; Carotenoids, standard deviation; Carotenoids per cell; Cell biovolume, standard deviation; Cell density; Cell density, standard deviation; Cell surface area/cell volume, standard deviation; Cell surface area/cell volume ratio; Chlorella sp.; Chlorophyll a, standard deviation; Chlorophyll a per cell; Chlorophyta; Day of experiment; Diameter; Diameter, standard deviation; Fugacity of carbon dioxide (water) at sea surface temperature (wet air); Growth/Morphology; Growth rate; Growth rate, standard deviation; Laboratory experiment; Laboratory strains; Light saturation; Light saturation, standard deviation; Maximal electron transport rate, relative; Maximal electron transport rate, relative, standard deviation; Maximum light utilization efficiency; Maximum light utilization efficiency, standard deviation; Non photochemical quenching, maximum; Non photochemical quenching, standard deviation; Not applicable; OA-ICC; Ocean Acidification International Coordination Centre; Partial pressure of carbon dioxide, standard deviation; Partial pressure of carbon dioxide (water) at sea surface temperature (wet air); pH; pH, standard deviation; Photochemical quantum yield; Photochemical quantum yield, standard deviation; Phytoplankton; Plantae; Potentiometric; Potentiometric titration; Primary production/Photosynthesis; Ratio; Ratio, standard deviation; Salinity; Salinity, standard deviation; Single species; Species; Surface area; Surface area, standard deviation; Temperature, water; Treatment; Type; Volume
Type:
Dataset
Format:
text/tab-separated-values, 2064 data points
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