天然产物研究与开发2017，Vol.29Issue(6)：947-953,7.DOI:10.16333/j.1001-6880.2017.6.008
生长素介导海藻酸钠寡糖调控水稻对镉胁迫的抗性
Auxin Mediates the Regulation of Alginate Oligosaccharides on Rice Resistance to Cadmium Stress
摘要
Abstract
Auxin transport inhibitor was used to explore whether auxin mediates modification of cadmium (Cd) toxicity by alginate oligosaccharides (AOS) in rice (Oryza sativa L.),from the view of the growth and antioxidant metabolism.The results showed that Cd stress significantly inhibited the growth of rice seedlings.The seedling length,aboveground biomass and belowground biomass were reduced to different degrees.Under the condition of Cd stress,AOS pretreatment significantly improved the activities of superoxide dismutase (SOD),peroxidase (POD) and ascorbate peroxidase (APX) in fice,and reduced O2-production rate.These changes resulted in the increases of SOD/O2-,SOD/POD,SOD/catalase (CAT) and POD/O2-and the decrease of malondialdehyde content.Seedling length,root length and biomass increased to some extent,but H2O2 had a certain accumulation in rice.After auxin signal was blocked,the ameliorating effects of AOS pretreatment (Cd + AOS + Y) on Cd stress was weakened in fice.Compared with the treatments of non-blocked auxin signal (Cd + AOS),growth indicators (such as seedling length,root length) and the activities of antioxidant enzymes was reduced;After adding exogenous auxin (Cd + AOS + Y + NAA),various indicators had been improved in different extent.These results preliminarily showed that auxin mediated the regulation of AOS on rice resistance to Cd stress.关键词
生长素/海藻酸钠寡糖/水稻/镉胁迫Key words
auxin/alginate oligosaccharides/rice (Oryza sativa L.)/cadmium (Cd) stress分类
农业科技引用本文复制引用
张运红,杜君,和爱玲,郑春风,孙克刚,尹海庆..生长素介导海藻酸钠寡糖调控水稻对镉胁迫的抗性[J].天然产物研究与开发,2017,29(6):947-953,7.基金项目
河南省科技攻关项目和河南省农业科学院自主创新项目(2069999) （2069999）
