Effect of Flavone from Forestry Waste C.Cathayensis Exocarp on Photosynthetic Characteristics of Crops

摘要

Using six kinds of concentration (ranged from 0.0 to 2.0mg.L-l) of flavone extract from C.cathayensis exocarp treats corn, soybean, wheat and mung bean seedlings, in order to study the photosynthetic rate, stomatal conductance, transpiration rate, intercellular CO_2 on the seedling leaf. Results show that effects of flavone extract (0.1-0.5mg.L-l) increase content of the chlorophyll a, b and total chlorophyll, promote photosynthetic rate, stomatal conductance, transpiration rate, proper increase cell gap inside the CO_2 concentration.0.1mg.L-l treatment effect is the most obvious compare with the control, the total chlorophyll and photosynthetic rate increase by 20.9 % and 21% respectively;;More than 0.5mg.L-l, the chlorophyll content, photosynthetic rate, stomatal conductance, transpiration rate decrease, the intercellular CO_2 rapid increase. Research shows that, ihe appropriate concentration of flavone can increase the chlorophyll content in the leaf, promote stomatal opening, increase of intracellular CO_2 supply, improve leaf photosynthesis efficiency.