Effects of Elevated Ozone Concentration on the Antiozidative System in Leaves of Soybean (Glycine maz)
In order to reveal effect mechanism of elevated ozone concentration on plants active oxygen species (AOS) and antioxidative system, open top chambers (OTCs) were utilized to investigate the change of the net photosynthetic rate, AOS, lipid peroxidation extent, content of antioxidant substance and antioxidative enzymes activities in soybean (Glycine max) leaves under different elevated ozone concentration. The results indicated that elevated ozone concentration induced a decrease on the net photosynthetic rate and the net photosynthetic rate decreased greatly with the increasing of ozone concentration; With the increase of ozone concentration, the bigger superoxide anion (O2) production rate, hydrogen peroxide (H2O2) content, content of malondialdehyde (MDA) and relative electrical conductivity increased gradually in soybean leaves; The activities of catalase (CAT) , peroxidase (POD) declined gradually with the increasing of ozone concentration, but there was no regular change observed in the activity of superoxide dismutase (SOD); Carotenoids (Car) content and ascorbic acid (ASA) content declined gradually. In whole growing season, MDA content, relative electrical conductivity and POD activity increased gradually with the fumigation time lengthening and the net photosynthetic rate, Car content and ASA content were higher earlier and lower later during the growth stages. But H2O2 content, O2 production rate decreased first during the flowering stages and increased later. But SOD activity increased gradually and CAT activity was enhanced during the flowering stages and weakened later. The results show that elevated ozone concentration accelerat ed AOS metabolism rates and reduced the anti-oxidative ability in soybean leaves, which decreased the net photosynthetic rate and photosynthesis was restrained.
elevated ozone concentration soybean (Glycine maz) active ozygen metabolism antiozidative system lipid perozidation
ZHAO Tianhong FU Yu SUN Jiawei JIN Dongyan CAO Ying WANG Yan Shi Yi
Shenyang Agricultural University: College of Agronomy,Shenyang 110161,Liaoning,China Chinese Academy of Sciences,Institute of Shenyang Applied Ecology ,Key Laboratory of Terrestrial Eco
国际会议
2009 International Symposium on Environmental Science and Technology(2009环境科学与技术国际会议)
上海
英文
137-141
2009-06-02（万方平台首次上网日期，不代表论文的发表时间）