农业环境科学学报2011，Vol.30Issue(8)：1500-1507,8.
不同价态外源硒对冬小麦生长及生理代谢的影响
Effects of Exogenetic Selenite and Selenate on the Growth and Physiological Metabolism of Winter Wheat
摘要
Abstract
Pot experiments were conducted to investigate the effects of exogenetic selenite and selenate on the growth and physiological metabolism of winter wheat in order to provide theoretical basis for the planting of selenium-enriched wheat. The results showed that exogenetic selenium inhibited wheat seedling growth (plant height and biomass) at all selenium levels. However, selenium first stimulated and then inhibited wheat growth as the increase of exogenetic selenium concentration in the late growth stage. The EC10 for Se(Ⅳ) and Se( Ⅵ) increased from 1.40 mg·kg-1 and 0.28 mg-kg-1 at seedling stage to 28.48 mg-kg-1 and 4.56 mg-kg-1 at the harvest stage, respectively. Selenite had greater influence on the growth of wheat than selenate. Wheat yield first increased and then decreased as the increase of added selenium, and reached the maximum values at 2.5 mg-kg-1 for selenite and 1 mg-kg-1 for selenate treated plants. Physiological metabolism analysis of winter wheat leaves showed that lower concentration of selenium in soil(Se( Ⅳ ) ≤5 mg·kg-1 and Se( Ⅵ )≤0.5 mg·kg-1) stimulated the activity of GSH and POD, and decreased MDA(Se≤2.5 mg·kg-1) contents significantly; the contrary results were found for higher concentration selenium treated plants.关键词
外源硒/生长/生理代谢/冬小麦Key words
selenium/ growth/ physiological metabolism/ winter wheat分类
资源环境引用本文复制引用
付冬冬,王松山,梁东丽,缪树寅,段曼莉,胡斌..不同价态外源硒对冬小麦生长及生理代谢的影响[J].农业环境科学学报,2011,30(8):1500-1507,8.基金项目
国家小麦现代农业产业技术体系建设专项 （）
西北农林科技大学“创新团队建设计划” （）
