title: [Eco-toxicological effects of selenium and its critical value on Oryza sativa].
abstract: In a pot experiment with brown-yellow soil, this paper studied the effects of different concentration selenium on the growth and activated oxygen- scavenging system of Oryza sativa. The results showed that low concentration Se (< 8 mg x kg(-1)) had a promoting effect on the wheat biomass, chlorophyll a, chlorophyll a/b, and activated oxygen- scavenging system, while high concentration Se (> 16 mg x kg(-1)) was in adverse. Soil Se concentration had a significant correlation with root biomass, shoot biomass, chlorophyll a/b, MDA, SOD, CAT, POD. It was defined by the pot experiment that 10% inhibition rate of root or shoot biomass could be regarded as critical value, and the critical content of soil Se was estimated to be 21 mg x kg(-1).
authors: Research Center of Risk Assessment and Management on Hazardous Chemicals, East China University of Science and Technology, Shanghai 200237, China. kflin@ecust.edu.cn
authors: Kuangfei
authors: K
authors: Lin
authors: Xiaoqing
authors: X
authors: Xu
authors: Xia
authors: X
authors: Jin
authors: Zhihui
authors: Z
authors: Shao
authors: Yaling
authors: Y
authors: Xiang
mesh_terms: D017753:Ecosystem; D012275:Oryza / Q000254:growth & development*; D036226:Seedlings / Q000254:growth & development; D012643:Selenium / Q000032:analysis*; D012987:Soil / Q000032:analysis*; D012989:Soil Pollutants / Q000032:analysis*
chemical_list: D012987:Soil; D012989:Soil Pollutants; D012643:Selenium