Publication Date:
2024-03-15
Description:
Global warming may exacerbate inorganic nutrient limitation, including phosphorus (P), in the surface-waters of tropical oceans that are home to extensive blooms of the marine diazotrophic cyanobacterium, Trichodesmium. We examined the combined effects of P limitation and pCO2, forecast under ocean acidification scenarios, on Trichodesmium erythraeum IMS101 cultures. We measured nitrogen acquisition, glutamine synthetase activity, C uptake rates, intracellular Adenosine Triphosphate (ATP) concentration and the pool sizes of related key proteins. Here, we present data supporting the idea that cellular energy re-allocation enables the higher growth and N2 fixation rates detected in Trichodesmium cultured under high pCO2. This is reflected in altered protein abundance and metabolic pools. Also modified are particulate organic carbon and nitrogen production rates, enzymatic activities, and cellular ATP concentrations. We suggest that adjusting these cellular pathways to changing environmental conditions enables Trichodesmium to compensate for low P availability and to thrive in acidified oceans. Moreover, elevated pCO2 could provide Trichodesmium with a competitive dominance that would extend its niche, particularly in P-limited regions of the tropical and subtropical oceans.
Keywords:
Adenosine 5-Triphosphate, per cell; Adenosine 5-Triphosphate, standard deviation; Alkalinity, total; Alkalinity, total, standard deviation; Aragonite saturation state; Bacteria; Bicarbonate ion; 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; Carbon/Nitrogen ratio; Carbon/Nitrogen ratio, standard deviation; Carbon/Phosphorus ratio; Carbon/Phosphorus ratio, standard deviation; Carbonate ion; Carbonate system computation flag; Carbon dioxide; Carbon dioxide, standard deviation; Carbon uptake rate, standard deviation; Carbon uptake rate per cell; CF1 subunit of ATP synthase protein; CF1 subunit of ATP synthase protein, standard deviation; Chlorophyll a, standard deviation; Chlorophyll a per cell; Cyanobacteria; Fugacity of carbon dioxide (water) at sea surface temperature (wet air); GlnA subunit of Gln synthetase; GlnA subunit of Gln synthetase, standard deviation; Glutamine synthetase biosynthetic activity, standard deviation; Glutamine synthetase biosynthetic activity per cell; Glutamine synthetase transferase/biosynthetic activity ratio; Glutamine synthetase transferase/biosynthetic activity ratio, standard deviation; Growth rate; Growth rate, standard deviation; Incubation duration; Iron protein of nitrogenase; Iron protein of nitrogenase, standard deviation; Laboratory experiment; Laboratory strains; Length; Length, standard deviation; Macro-nutrients; Nitrogen/Phosphorus ratio; Nitrogen/Phosphorus ratio, standard deviation; Not applicable; OA-ICC; Ocean Acidification International Coordination Centre; Other metabolic rates; Partial pressure of carbon dioxide (water) at sea surface temperature (wet air); Particulate organic carbon, per cell; Particulate organic carbon, production, standard deviation; Particulate organic carbon content per cell, standard deviation; Particulate organic carbon production per cell; Particulate organic nitrogen, standard deviation; Particulate organic nitrogen per cell; Particulate organic nitrogen production, standard deviation; Particulate organic phosphorus, standard deviation; Particulate organic phosphorus per cell; Pelagos; pH; pH, standard deviation; Phosphate; Photosynthetic protein, PsbA, standard deviation; Photosynthetic protein, PsbC; Photosynthetic protein, PsbC, standard deviation; Photosynthetic protein PsbA; Photosynthetic protein Rubisco; Photosynthetic protein Rubisco, standard deviation; Phytoplankton; Primary production/Photosynthesis; Production of particulate organic nitrogen; Salinity; Single species; Species; Temperature, water; Trichodesmium erythraeum
Type:
Dataset
Format:
text/tab-separated-values, 1003 data points
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