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KMID : 0613820080180050674
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Journal of Life Science
2008 Volume.18 No. 5 p.674 ~ p.679
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Kinetics Model Fitting of Photosynthesis and Growth in Chlorella sp.
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Kang Byeong-Chul
Kang Soon-Tae
Wang Hui-Chih
Sur Zee-Won
Kim Chang-Hoon
Cho Man-Gi
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Abstract
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We investigated which is the best kinetic model for expression of microalgal growth and photosynthesis by irradiance in green microalgae, marine Chlorella sp. is cultivated under 5 light intensities (27, 54, 81, 140, and 281 μmol/m2.s). The maximum of specific growth rate and photosynthesis at light intensity of 81μmol/m2.s were observed as 0.35/day and 0.94 mg02/g.h, respectively. To describe the effect of irradiance, we adapted both types for kinetic model fitting, saturation and inhibition models, Tamiya’s modified Michaelis- Menten equation, hyperbolic tangent and Poisson function as saturation model, Steele’s exponential and Andrew’s function as the other and made the specific growth rate- irradiance response curve and photosynthesis- irradiance response curve. In case of microalgal growth, one of the saturation models, the hyperbolic tangent function was the most suitable, otherwise, the Steele’s exponential function, one of the inhibition models, was suitable for photosynthesis.
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KEYWORD
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Chlorella sp., specific growth rate- irradiance response curve, photosynthesis- irradiance response curve, kinetic model fitting
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