盐碱胁迫对流苏幼苗的生理影响  

Physiological Response of Threshold of Chionanthus retusue Seedlings under Salt-alkali Stress

作　　者：韩丽霞 欧阳敦君 刘文静 张鸽香[1] Han Lixia;Ouyang Dunjun;Liu Wenjing;Zhang Gexiang(Nanjing Forestry University,Nanjing 210037,P.R.China)

机构地区：[1]南京林业大学,南京210037

出　　处：《东北林业大学学报》2020年第7期11-16,共6页Journal of Northeast Forestry University

基　　金：国家林业局“948”项目(2014-4-17);江苏高校品牌专业建设工程资助项目(PPZY2015.A063)。

摘　　要：以流苏2年生播种苗为试材,模拟12种不同盐碱条件,研究盐碱胁迫下流苏苗的盐害症状及生理生化反应。结果显示:随着盐碱胁迫的加重,流苏叶片相对电导率、丙二醛质量摩尔浓度、脯氨酸质量浓度、可溶性糖质量分数整体呈增加趋势;SOD活性呈“上升-下降-上升”的变化,流苏叶片叶绿素质量分数呈现“上升-下降”趋势。研究表明,流苏在低盐轻碱条件下可以良好生长,在中盐(200 mmol·L^-1)、pH值≥8.45条件下,会对流苏造成较大影响。盐与碱的协同作用使胁迫产生叠加效应,加重危害的程度。The saline symptoms and physiological and biochemical reactions of 2-year-old seedlings of Chionanthus retusue under saline-alkali stress were studied by simulating 12 different saline-alkali conditions.The relative conductivity,MDA,proline and soluble sugar contents of C.retusue leaves increased with the increase of salinity and alkali stress.While the SOD activity showed an“up-down-up”change,and the chlorophyll content of C.retusue leaves showed a“up-down”trend.C.retusue can grow well under low salinity and light alkali conditions,and under medium salinity(200 mmol·L^-1)and pH value≥8.45,it will have a greater impact on C.retusue.The synergistic effect of salt and alkali will make stress produce superimposed effect and aggravate the degree of harm.

关 键 词：流苏 盐碱胁迫 生理响应 

分 类 号：S685.99[农业科学—观赏园艺] Q945.78[农业科学—园艺学]