Title: Daily Dynamics of Photosynthesis in Five Bougainvillea Varieties
Abstract: Daily dynamics of photosynthesis,including the net photosynthetic rate,relative humidity,photosynthetic available radiation,temperature,atmospheric CO2 concentration,transpiration rate,stomatal conductance between carbon dioxide concentrations,etc.and chlorophyll fluorescence kinetics parameters of five Bougainvillea varieties were studied with CI-340 portable photosynthesis and OS1 determination systems-FL portable chlorophyll fluorescence analyzer.The results showed that asymmetric bimodal curve of Pn was present at all Bougainvillea varieties examined,'noon break' phenomenon was apparent.Stomatal conductance,transpiration rate and net photosynthetic rate changes were positive correlated with Bougainvillea photosynthetic rate,and stomatal limitation was the main factor to influence on Pn falling.The daily change of chlorophyll fluorescence parameters showed that photosynthetic activities were temporarily inhibited and photosynthetic organs had not been damaged,and they resume their functions with decrease of photosynthetic available radiation and temperature.The difference was rare among all varieties examined,and they all could adapt more strong radiation and high temperature in cultivated conditions.
Publication Year: 2011
Publication Date: 2011-01-01
Language: en
Type: article
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