The effect of increased CO2 concentration in atmosphere on chlorophyll fluorescence and photosynthesis of some genotypes of winter oilseed rape
Journal Title: Rośliny Oleiste - Oilseed Crops - Year 2010, Vol 31, Issue 2
Abstract
The aim of the present work was the study of the effect of doubled CO2 concentration (800 ppm) on values of chlorophyll fluorescence parameters, photosynthesis and transpiration intensity. Results of studies on the effect of enhanced concentration of carbon dioxide in the atmosphere on photosynthesis of young plants of winter oilseed rape belonging to selected population varieties and hybrids are presented. Population varieties (Bosman, Libomir), male sterile hybrids (MH 35 F1, MH 36 F1) and the restored hybrids (Titan F1, Kronos F1) were studied. Plants were grown on sand with the Hoagland nutrient in the controlled conditions (PPFD 300 μmol×m-2×s-1, 16oC) at two concentrations of CO2: 400 ppm (control) and 800 ppm. The experiment was continued for four weeks, and the plants were at the phase of 5–6 leaf. Efficiency of light phase reactions in the leaves was evaluated using modulated chlorophyll fluorescence measured by means of a pulse fluorometer. Enhanced CO2 concentration did not change the values of chlorophyll fluorescence in the studied leaves, and no difference between varieties was shown. Intensity of carbon dioxide assimilation measured with a gas analyzer was higher in the plants grown at increased CO2 concentration from 14 to 25% compared to the control, and Titan and Kronos restored hybrids showed the highest values. Increased CO2 caused the decrease of transpiration intensity, particularly in a case of male sterile hybrids.
Authors and Affiliations
Antoni Murkowski, Andrzej Mila
Keywords
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