Abstract
The photosynthetic behaviour of Dunaliella parva Lerche from the athalassic lagoon of Fuente de Piedra (Malaga, Southern Spain) was studied experimentally at three NaCl concentrations (1, 2 and 3 M), five temperatures (15, 23, 31, 38 and 42 °C) and nine different irradiances between 82 and 891 mol m-2 s-l. Results are analyzed to define the best growing conditions for the algae.
D. parva shows the highest photosynthetic rates at a NaCl molarity of 2 M, under a moderate light intensity (600 mol m-2 s-1) at 31 °C. Above this light intensity a clear photoinhibition of the photosynthesis was found at 2 M and 3 M of NaCl. D. parva is a halotolerant and a thermoresistant species as evidenced by its net photosynthesis rate and positive values of oxygen evolution at 42 °C.
Two methods for modelling photosynthesis vs. irradiance curves are discussed. The first is a single model, based on third-order polynomial equations, and the second is double model, based on hyperbolical Michaelis-Menten type functions and negative exponential to define photoinhibition.
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Jiménez, C., Niell, F.X., Fernández, J.A. (1990). The photosynthesis of Dunaliella parva Lerche as a function of temperature, light and salinity. In: Comín, F.A., Northcote, T.G. (eds) Saline Lakes. Developments in Hydrobiology, vol 59. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-0603-7_15
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DOI: https://doi.org/10.1007/978-94-009-0603-7_15
Publisher Name: Springer, Dordrecht
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