Biological effect of rare-earth elements on anti-oxidation enzymes in wheat under acid rain stress
Tóm tắt
Based on pot-culture experiments, the biological effect of rare-earth elements (REE) on antioxidation enzymes of wheat under acid rain stress was studied. The results show that both acid rain and REE can affect the activity of anti-oxidation enzymes of wheat to different extents. Under the acid rain stress, anti-oxidation enzymes (CAT, SOD) of wheat showed single peak curve with the decrease of pH values. After REE were applled, variation of activities of anti-oxidation enzymes was relatively stable and the peak value of variation curve would move in the direction of increased acidity. Under low acidity of acid rain, REE could reduce the sensitivity of anti-oxidation enzymes of wheat to acid rain stress significantly and promote the resistance of anti-oxidation enzymes of wheat to acid rain.
Tài liệu tham khảo
Yan, C. L., Hong, Y. T., Fu, S. Z.et al., Effect of Cd, Pb stress on scarenging system of activated oxygen in leaves of tobacco,Acta Ecological Sinica (in Chinese), 1997, 17(5): 42.
Liu, Y. Y., Cao, H. F. Leaf injury and superoxide dismutase activity in spinach leaves exposed to SO2 and or simulated acid rain,Chinese Journal of Applied Ecology (in Chinese), 1993, 4(2): 223.
Yan, C. L., Li, R. Z., Zhong, Z. G., Effect of simulated acid rain on ecophysiological characteristics of mung bean and maize,Chinese Journal of Applied Ecology (in Chinese), 1995(Supp.): 124.
Ni, J. Z..Biological Inorganic Chemistry of Rare Earth Element (inChiense), Beijing: Science Press, 1995, 15.
Cao, H. F., Gao, Y. X., Shu, J. M.et al., Study on simulated acid precipitation effects on growth and yield of agricultural crops,Acta Phytoecologica et Geobotanica Sinica (in Chinese), 1989, 13(1): 484.
Yan, C. L., Zhong, Z. C., Fu, S. Z.et al.. Effects of Pb, Hg on anti-oxidation enzymes in tobacco leaves,Acta Scienttial Circumstantiae (in Chinese), 1997, 17(3): 58.
Huff, A., Peroxidase-catalysed oxidation of chlorophyll by hydrogen peroxide,Phytochemistry, 1982(21): 261.
Brennan, T., Frenkel, C., Envirenment of hydrogen peroxide in the regulation of senescence in pear,Plant Physio., 1997, 59: 411.
Chen, Z. X., Wang, X. R., Tian, L. Q., Environmental behavior and availability of plant of rare earth elements under simulated acid rain,Acta Scientiae Circumstantiae (in Chinese), 1995, 15(1): 33.
Sun, J. X., Zhao, H., Wang, Y. Q., Content and distribution of rare earth elements in wheat and rice,Chinese Science Bulletin, 1992, 37(24): 2273.