盐胁迫下外源Si对甘草种子萌发及幼苗K^+、Na^+含量的影响  

Effects of exogenous silicon on seed germination and concentrations of K^+ and Na^+ in licorice(Glycyrrhiza uralensis) seedlings under salt stress

作　　者：崔佳佳[1] 张新慧[2,3,4,5] 张恩和[1] 

机构地区：[1]甘肃农业大学农学院,甘肃兰州730070 [2]宁夏医科大学药学院,宁夏银川750004 [3]宁夏回药现代化工程技术研究中心,宁夏银川750004 [4]宁夏回医药协同创新中心,宁夏银川750004 [5]宁夏医科大学回医药现代化省部共建教育部重点实验室,宁夏银川750004

出　　处：《草原与草坪》2016年第5期1-7,共7页Grassland and Turf

基　　金：国家自然科学基金(31260304;31460330)资助

摘　　要：以乌拉尔甘草(Glycyrrhiza uralensis)种子为试验材料,研究在NaCl(100和200mmol/L)胁迫下,不同浓度Si(0、0.4、0.8、1.2、1.6和2.0mmol/L)对种子萌发及幼苗根冠比和K^+、Na^+含量的影响。结果表明:外源Si对盐胁迫下种子的发芽率、发芽势和发芽指数均具有显著的促进作用,且Si浓度在0.4和2.0mmol/L下作用最佳;Si可显著增加幼苗的根冠比,幼苗可通过增加K^+吸收,减少Na^+吸收来维持根系内K^+、Na^+的平衡。The effects of exogenous silicon（0,0.4,0.8,1.2,1.6and 2.0mmol/L）on seed germination and the concentrations of K＋and Na＋of licorice（Glycyrrhiza uralensis）under salt stress（100 and 200 mmol/L NaCl）were studied.The results showed that the application of silicon increased the germination rate,germination potential,germination index and root-shoot ratio of seedlings under salt stress,and the improving effect was the best while the silicon concentrations were 0.4 and 2.0 mmol/L.Application of silicon could maintain the balance between K^＋ and Na^＋by improving the absorption of K＋and reduced the absorption of Na＋under salt stress in licorice seedlings.

关 键 词：甘草 盐胁迫 SI 种子发芽 K+、Na+ 

分 类 号：S318[农业科学—作物栽培与耕作技术]