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《Journal of Agro-Environment Science》 2008-01
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Effects of Enhanced UV-C Radiation on Photosynthetic Characteristics of Poa pratensis

WANG Yan1, WANG Lan-lan1, MA Lian-ju1, TAO Si-yuan2, DAI Bao-qing3, YU Long2 (1.Chemical and Life Science of Shenyang Normal University , Shenyang 110034, China; 2.Experimental Center of Shenyang Normal University, Shenyang 110034, China; 3.Gardening Programming Design Institute of Shenyang City, Shenyang 110016, China)  
The physiological characteristics of Poa pratensis were studied under different CO2 concentrations and different net photosynthetic radiation after enhanced UV-C radiation in pot experiments. The net photosynthetic rate obviously decreased under UV-C radiation and the inhibition increased as the increasing of radiation time. The net photosynthetic rate under the active photosynthetic radiation of 1 600 μmol ·m-2·s-1 was lower than that of 800 μmol·m-2·s-1 .The increasing of CO2 concentration could enhance the net photosynthetic rate after UV-C radiation. The simulating analysis by logistic equation showed that the maximal net photosynthetic rate decreased with the radiation time of UV-C when the CO2 concentration increased and the maximum of net photosynthetic rate decreased under high active photosynthetic radiation. UV-C radiation led to the decreasing of stomatic conductivity and correlation value was low between CO2 concentration and stomatic conductivity. Evaporation rate had the same tendency with stomatic conductivity.
【Fund】: 辽宁省博士启动基金(20031029);; 国家自然科学基金(30570445);; 沈阳师范大学博士启动基金;; 沈阳师范大学主任基金
【CateGory Index】: S688.4
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