Nutrients, Signals, and Photosynthate Release by Symbiotic Algae (The Impact of Taurine on the Dinoflagellate Alga Symbiodinium from the Sea Anemone Aiptasia pulchella)

摘要: Exogenous concentrations of 10 [mu]M to 1 mM the nonprotein amino acid taurine stimulated photosynthate release from dinoflagellate alga Symbiodinium, which had been freshly isolated sea anemone Aiptasia pulchella. Photosynthate release, as induced by and animal extract, was metabolically equivalent at both in that they (a) same extent (b) selective photosynthetically derived organic acids. A complex mixture acids 75 also promoted but rate reduced 34% after omission (3 mM) mixture, suggesting much effect largely attributable taurine. 14C-labeled taken up cells, more than 95% internalized 14C recovered taurine, indicating taurine-induced not dependent on metabolism. Both uptake Symbiodinium exhibited saturation kinetics, with significantly different Km values 68 21 [mu]M, respectively. The difference is compatible hypothesis has a signal transducer responsible for distinct transporter.