2种不同基因型玉米苗期盐胁迫反应及耐盐性研究  

Response of two different-genotype maize at seedling stage to salt stress and evaluation of their salt tolerance

作　　者：程玉静[1] 孙权星[1] 彭长俊[1] 陈小晖[1] 陆虎华[1] 石明亮[1] 薛林[1] 

机构地区：[1]江苏沿江地区农业科学研究所,如皋226541

出　　处：《上海农业学报》2012年第2期53-58,共6页Acta Agriculturae Shanghai

基　　金：江苏省自主创新项目[CX(11)4059];江苏省自主创新项目[CX(10)133]资助

摘　　要：以2种不同基因型玉米(普通玉米WXWX和糯玉米wxwx)为材料,用浓度为250mmol/L NaCl进行盐胁迫处理,考察玉米发芽势、发芽率、幼苗期不同生长阶段的株高(6、10d和14d)、鲜重和干重(14d)变化率,研究玉米种质苗期的盐胁迫反应,对玉米种质进行耐盐性鉴定。结果表明:玉米对盐胁迫较敏感,盐胁迫下发芽势、株高、鲜重和干重受到显著抑制;不同材料间耐盐性存在明显差异,10d株高、14d株高、鲜重和干重变化率能一致地反映出不同材料的耐盐性;通过筛选鉴定,18份材料中,‘通系5’(wxwx)和‘4A’(WXWX)为较耐盐的玉米自交系,‘苏玉947’(WXWX)和‘登海9号’(WXWX)为较耐盐的玉米单交种。Two different-genotype maize（ordinary maize-WXWX and waxy maize-wxwx）were used as test materials, and their seeds＇ germination vigor and germination rate, their plant height at 6,10 and 14 days and their fresh/dry plant weight at 14 days were investigated under 250 mmol/L NaC1 stress in order to study the response of the seedling-stage maize to salt stress and test for the salt tolerance of maize materials. The re- sults showed that maize was sensitive to salt stress, and the germination vigor, plant height and fresh/dry plant weight were significantly depressed under salt stress; Various maize materials had significantly different salt tolerances which could be reflected conformably by the change rates of 10 d or 14 d plant height and 14 d fresh/dry plant weight. The tests indicated that among the 18 maize materials ＇Tongxi 5 ＇（wxwx） and ＇4A＇ （WXWX） were relatively salt-tolerant inbred lines, and ＇ Suyu 947＇ （WXWX） and ＇ Denghai 9＇ （WXWX） were relatively salt-tolerant interlinear hybrids.

关 键 词：玉米 种子萌发 苗期 耐盐性 

分 类 号：S513[农业科学—作物学] S501