Diurnal and Seasonal Variations in the Photosynthetic Characteristics and the Gas Exchange Simulations of Two Rice Cultivars Grown at Ambient and Elevated CO₂.

ABSTRACT: Investigating the diurnal and seasonal variations of plant photosynthetic performance under future atmospheric CO₂ conditions is essential for understanding plant adaptation to global change and for estimating parameters of ecophysiological models. In this study, diurnal changes of net photosynthetic rate (A_net), stomatal conductance (g_s), and photochemical efficiency of PSII (F_v'/F _m ') were measured in two rice cultivars grown in the open-top-chambers at ambient (∼450 μmol mol^-1) and elevated (∼650 μmol mol^-1) CO₂ concentration [(CO₂)] throughout the growing season for 2 years. The results showed that elevated (CO₂) greatly increased A_net, especially at jointing

SUBMITTER: Miao Y 

PROVIDER: S-EPMC8056013 | biostudies-literature | 2021

REPOSITORIES: biostudies-literature