盐胁迫对盐地碱蓬种子萌发及幼苗生长的影响  

The Effects of Saline Condition on the Germination and Seedling Growth of Suaeda salsa

作　　者：李存桢[1,2] 刘小京[1] 杨艳敏[1] 刘春雨[1] 

机构地区：[1]中科院遗传与发育生物研究所农业资源研究中心 [2]中国科学院研究生院,北京100039

出　　处：《中国农学通报》2005年第5期209-212,共4页Chinese Agricultural Science Bulletin

基　　金：国家科技部中巴政府间合作项目(16-413);河北省"十五"科技攻关资助项目(03220169D)。

摘　　要：用不同浓度(0、0.2、0.4、0.6、1.2、1.8、2.8、3.6g/100ml)的盐溶液(土壤溶液、Na2SO4及NaCl)处理盐地碱蓬种子,以研究其在盐胁迫下的萌发及萌发后的生长情况,并观察胁迫解除后种子的反应,为其栽培利用提供理论依据。实验结果表明,盐地碱蓬种子的萌发对盐渍生境的适应性很强,能耐受较高的盐胁迫。对其种子萌发的胁迫作用是NaCl>土壤溶液>Na2SO4。随着盐浓度的升高,种子的萌发率呈现不同程度的降低。盐胁迫解除后,盐地碱蓬种子仍具有较高的萌发力,发芽速度和整齐度提高。幼根和幼芽对不同种类盐胁迫表现出不同的反应,盐浓度对根的影响较大。经盐锻炼之后,盐地碱蓬幼苗恢复生长的能力提高。The seed of Suaeda salsa was treated with different concentration of natural soil salt solution, Na2SO4 and NaCl ,salinity from 0?0.2?0.4?0.6?1.2?1.8?2.8?3.6g/100ml .The germination percentage and growth status of scion and radicle were determined. After removing the stress , the response of the seed and seedling were also observed. The results showed that stronger adaptation of Suaeda salsa to the saline environment were approved. It could bear higher salt stress. The inhibition to the seed germination was NaCl> natural soil salt solution >Na2SO4. With the increasing of salts, the germination percentage had different decrease. After removing the salt stress, the seed of Suaeda salsa still had higher ability to germination. The speed and the orderliness of germination were also improved. The scion and radicle had different response to the salts, and the salt concentrations had more influence on the radicle. After being tempered by the salt, the ability of growing of the seedling was improved.

关 键 词：盐地碱蓬 种子萌发 盐胁迫 幼苗生长 Na2SO4 土壤溶液 生长情况 栽培利用 胁迫作用 发芽速度 能力提高 恢复生长 盐浓度 盐溶液 适应性 萌发率 萌发力 整齐度 反应 解除 幼芽 幼根 

分 类 号：S512.1[农业科学—作物学] Q945.78[生物学—植物学]