Photosynthetica, 2011 (vol. 49), issue 3

Photosynthetica 2011, 49(3):467 | DOI: 10.1007/s11099-011-0056-5

A mathematical model for describing light-response curves in Nicotiana tabacum L.

Z. Y. Chen1, Z. S. Peng1,*, J. Yang1, W. Y. Chen1, Z. M. Ou-Yang1
1 Key Laboratory of Southwest China Wildlife Resources Conservation, College of Life Science, China West Normal University, Nanchong, Sichuan Province, P. R. China

A modified exponential model was used to describe light-response curves of Nicotiana tabacum L. The accuracies of an exponential model, a nonrectangular hyperbola model, a rectangular hyperbola model, a modified rectangular hyperbola model and the modified exponential model were evaluated by Mean square error (MSE) and Mean absolute error (MAE). The tests MSE and MAE of the modified exponential model were the lowest among the five models. The light saturation point (LSP) obtained by the exponential model, the nonrectangular hyperbola model and the rectangular hyperbola model were much lower than the measured values, and the maximum net photosynthetic rates (P max) calculated from these models, were greater than the measured values. P max at LSP of 1,077 μmol m-2 s-1 calculated by the modified exponential model was 12.34 μmol(CO2) m-2 s-1, which was more accurate than the values obtained from the modified rectangular hyperbola model. The results show that the modified exponential model is superior to other models for describing light-response curves.

Keywords: light-response curves; light saturation point; maximum net photosynthetic rate; modified exponential model; net photosynthetic rate; Nicotiana tabacum L.

Received: November 10, 2010; Accepted: May 19, 2011; Published: September 1, 2011Show citation

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Chen, Z.Y., Peng, Z.S., Yang, J., Chen, W.Y., & Ou-Yang, Z.M. (2011). A mathematical model for describing light-response curves in Nicotiana tabacum L. Photosynthetica, 49(3), 467. doi: 10.1007/s11099-011-0056-5.
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