盐份对大麦幼苗形态建成的影响  

The Effect of Salinity on the Growth of Barley Seedlings

作　　者：许如根[1] 周美学 陆峰[1] 吕超[1] 

机构地区：[1]扬州大学农学院,江苏扬州225009 [2]Tasmanian大学农研所

出　　处：《种子》2007年第9期21-23,27,共4页Seed

基　　金：国家科技支撑计划(2006BAD02B04-2);公益性行业专项计划(nyhyzx07-10);中-澳合作项目(UT8)

摘　　要：盐浓度对作物生长的影响一直是研究的热点。为探讨盐胁迫对大麦幼苗形态建成的影响,以4个耐盐性不同的大麦品种为材料,研究了不同时期、不同盐浓度(NaCl)对大麦幼苗根数、根长、芽长及鲜重的影响。研究结果表明:(1)大麦普遍具有较强的耐盐能力,但不同品种的耐盐能力存在显著差异。就大多数大麦品种而言,0.3%以下盐水发芽对幼苗主要器官的生长影响不大,能较好地完成幼苗形态建成,0.5%以上盐水对幼苗主要器官的生长发育产生的影响较大。(2)除不同盐份对发芽10d幼苗芽长的影响不显著外,盐份对发芽5d和10d大麦幼苗主要性状产生了显著的影响,但随着发芽时间的延长,盐浓度对幼苗主要性状的影响程度均有所下降。Salinity is one of the major abiotic stresses affecting agricultural production. Four barley cultivars, differing in salt tolerance, were used to study the effect of salt on the growth of barley seedlings. The traits measured included： number of roots per seedling, root length, shoot length and fresh weight of seedlings. Standard germination techniques were employed using blotting paper saturated with different NaCl solutions （water, 0.15% , 0.3% , 0.5% , and 1.0% NaCl） at 20 ℃. The results showed significant differences among barley cultivars. A solution of 0.3% or less NaCl showed very little effect on the seedling growth for all the cultivars. However, when the concentrations of NaCl were increased to more than 0.5%, the seedling growth of all the cultivars was significantly affected. The effect of salinity on seedling growth in its early stage （5 days after germination）, was more obvious than that at 10 days after germination. Thus, for preliminary e- valuation of salinity tolerance, the best criteria are number of roots per seedling, root length, shoot length and fresh weight of seedhngs after 5 days of germination under 0.5% or 1.0% NaCl solution.

关 键 词：大麦 盐浓度 幼苗形态建成 

分 类 号：S512.3[农业科学—作物学]