Photosynthetica 2002, 40(2):293-300 | DOI: 10.1023/A:1021314211953

Modelling Net Photosynthetic Rate of Winter Wheat in Elevated Air CO2 Concentrations

N. Harnos1, Z. Tuba2, K. Szente2
1 Agricultural Research Institute of the Hungarian Academy of Sciences, Martonvásár, Hungary
2 Department of Botany and Plant Physiology, Faculty of Agricultural and Environmental Sciences, St István University, Gödöllő, Hungary

Winter wheat plants were grown in open top chambers either at 365 µmol mol-1 (AC) or at 700 µmol mol-1 (EC) air CO2 concentrations. The photosynthetic response of flag leaves at the beginning of flowering and on four vertical leaf levels at the beginning of grain filling were measured. Net photosynthetic rates (PN) were higher at both developmental phases in plants grown at EC coupled with larger leaf area and photosynthetic pigment contents. The widely accepted Farquhar net photosynthesis model was parameterised and tested using several observed data. After parameterisation the test results corresponded satisfactorily with observed values under several environmental conditions.

Additional key words: acclimation; carotenoids; chlorophyll; intercellular CO2 concentration; leaf area; net photosynthetic rate; ribulose-1,5-bisphosphate carboxylase, oxygenase capacity; temperature; Triticum aestivum

Published: June 1, 2002  Show citation

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Harnos, N., Tuba, Z., & Szente, K. (2002). Modelling Net Photosynthetic Rate of Winter Wheat in Elevated Air CO2 Concentrations. Photosynthetica, 40(2), 293-300. doi: 10.1023/A:1021314211953
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