盐胁迫对沙芦草萌发特性影响及耐盐性评价  

Effects of salt stress on germination characteristics of Agropyron mongolicum and salt-tolerance evaluation

作　　者：周璐璐[1] 伏兵哲[1] 许冬梅[1] 陈丽萍[1] 吴小娟[1] 高雪芹[2] 

机构地区：[1]宁夏大学农学院草业科学研究所,宁夏银川750021 [2]宁夏大学科学技术处,宁夏银川750021

出　　处：《草业科学》2015年第8期1252-1259,共8页Pratacultural Science

基　　金：宁夏自然科学基金(NZ2013030);宁夏高等学校科学研究项目(NGY2013026);"十二五"国家科技支撑计划(2011BAD17B05)

摘　　要：用不同浓度(0.00%、0.30%、0.60%、0.90%、1.20%)的Na Cl溶液对7份不同地区野生的沙芦草(Agropyron mongolicum)和对照蒙农1号蒙古冰草(Agropyron mongolicum cv.Mengnong No.1)进行种子萌发期盐胁迫试验,并采用隶属函数法对其耐盐性进行综合评价。结果表明,不同浓度的Na Cl溶液对沙芦草的各项指标均有影响,且随着胁迫强度的增强,发芽率、发芽势、发芽指数活力指数、苗长与根长均有明显下降;轻度盐胁迫(0.30%、0.60%)对沙芦草部分材料幼根的生长具有促进作用,重度盐胁迫(0.90%、1.20%)对幼根具有较强的抑制作用。隶属函数法评价结果表明,8份材料萌发期耐盐性排序为:冯记沟7号>新庄集5号>马儿庄4号>野湖井3号>四墩子1号>四墩子2号>蒙农1号蒙古冰草>罗山保护区6号,初步判定于冯记沟采集的沙芦草野生种耐盐性最强,于罗山保护区采集的野生种耐盐性最弱。The germination characteristics of 7 wild ecotypes of Agropyron mongolicum from different areas and cultivar Mengnong No. 1 under different NaC1 concentrations（0.00%, 0.30%, 0.60%, 0.90%, 1.20 %）were measured and salt tolerance performances were comprehensive evaluated by membership func- tion. The result showed the salt stress had obvious inhibition on each index because the germination per- centage, germination potential, germination index, vitality index and relative seedling length and root length obviously decreased with the increase of salt stress. Light salt stress （0.30% and 0.60%） promoted radicle growth for some materials and heavy salt stress （0.90% and 1.20%） strongly inhibited radicle growth for all these 8 germplasms. Based on the membership function method, the salt stress tolerance of these studied 8 germplasms decreased in the following order： Fengjigou No.7 ） Xinzhuangji No.5 ） Ma＇ erzhuang No. 4〉 Yehujing No. 3 〉 Sidunzi No. 1 〉Sidunzi No. 2 〉 Agropyron mongolicurn cv. Mengnong No.1 〉 Luoshan protection No.6. Thus, the germplasms from Fengjigou had stronger salt tol-erance and the germplasms from Luoshan natural reservation had weaker tolerance.

关 键 词：沙芦草 盐胁迫 种子萌发 综合评价 

分 类 号：S543.9[农业科学—作物学]