The Transpiration Rate and Net Photosynthesis Changes in the Flowering Stages of Salvia sclarea and Their Effected Factors

The changes of transpiration rate,net photosynthesis in a day and their relationship with various environmental factors were studied in this paper.The results revealed that the transpiration and stomatal conductance were with similar changing tendency in different flowering stages in one day;the obvious difference of net photosynthetic rate in different flowering stages was observed,in which the net photosynthetic rate of primary flowering stage was higher than that of full flowering stage and terminal flowering stage.The correlation analysis revealed that the moisture degree and the intensity of illumination were the main factors that effect the transpiration and stomatal conductance.Otherwise,the intensity of illumination and the change of CO2 concentration have the largest effect on the net photosynthetic rate.