不同大豆品种耐盐性表现分析

Performance Analysis on Salt Tolerance for Different Soybean Varieties

为筛选和鉴定耐盐大豆品种,以大庆地区比较常见的主栽大豆品种抗线3号、抗线9号、1133和合丰50为材料,利用含有浓度为0.9%NaCl的1/2Hongland营养液对大豆幼苗进行盐处理试验。观察记录不同大豆品种幼苗的生长发育情况,同时在盐处理0、3、6、9、12、24和48h后分别取大豆幼苗的叶片和根系测量超氧化物歧化酶活性、过氧化物酶活性和丙二醛含量。结果表明:抗线3号在短时间内盐胁迫下的生长情况优于另3个品种,随着盐胁迫时间的延长不同大豆品种幼苗都出现明显的盐害现象,生长发育受到严重抑制;抗线3号的超氧化物歧化酶活性和过氧化物酶活性高于另3个大豆品种,而丙二醛含量低于另3个大豆品种。

For the purpose of selecting and identify salt resistance soybean varieties, taking the soybean varieties Kangxian No. 3, Kangxian No. 9,1133 and Hefeng50 as experiment materials, the roots of the seedlings were immersed in 1/2Hongland＇s solutions containing 0. 9 %（W/V）NaC1, the different soybean varieties seedling growth and development were observed and recorded. The roots and leaves from plants of every cultivar under salt treatment were collected to measure SOD activity, peroxidase activity and malondialdehyde content after 0, 3,6,9,12,24 and 48 hours. The results showed that growth and development of Kangxian No. 3 under salt stress in a short time was better than the other varieties. With the stress time increasing,the seedlings were all presented salt injury,the growth were all restricted seriously. SOD and POD activity in Kangxian No. 3 were higher than those of other soybean varieties, but the MDA content was lower than that of other soybean varieties.