PARAMETERIZATION AND TESTING OF A COUPLED MODEL OF PHOTOSYNTHESIS-STOMATAL CONDUCTANCE FOR GREENHOUSE ROSE CROP (original) (raw)
| Authors: | S.-H. Kim, J.H. Lieth |
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| Keywords: | Rosa hybrida, gas exchange, biochemical model |
| DOI: | 10.17660/ActaHortic.2002.593.14 |
| Abstract: A coupled model of leaf photosynthesis and stomatal conductance as a function of photosynthetically active radiation (PAR), CO2, leaf temperature, relative humidity, and leaf age was calibrated for rose leaves. The photosynthetic parameters: maximum carboxylation rate (V_cmax_), potential rate of electron transport (J_max_), rate of triose phosphate utilization (TPU), and leaf dark respiration rate (R_d_) were determined using gas exchange data of fully expanded, young, sunlit leaves. The temperature dependence of V_cmax_, J_max_, and TPU were determined.The stomatal conductance model was calibrated using the gas exchange data for combinations of relative humidity, light, and temperature. The model was calibrated and validated for the cut-flower rose variety �Kardinal�. V_cmax_ and J_max_ were also evaluated for cultivars �Cara Mia� and �Fire�N Ice�. | |
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