大豆苗期盐害离子效应的比较

Comparison of ion effects of salt injury in soybean seedlings

选取耐盐性不同的栽培和野生大豆的代表品种或种群Lee6 8、BB5 2 (耐盐性较强 ) ,苏协 1号、N2 32 32 (耐盐性较弱 ) ,从盐害离子效应方面 ,比较了轻度 (- 0 5 5MPa)和重度 (- 1 10MPa)等渗胁迫下 ,Na+ 、Cl-及NaCl对幼苗生长、叶片电解质渗漏率、叶绿素和类胡萝卜素含量等的影响 ,并讨论了大豆盐害的离子效应。结果表明 ,在幼苗期 ,相同渗透势的轻度和重度Na+ 、Cl-及NaCl处理 ,对供试各材料幼苗株高、根鲜重和体积及叶片电导率等均产生影响 ,但Na+ 和Cl-处理间无显著差异 ,NaCl处理表现增强效应。这说明Na+ 。

Choosing the representative cultivars or populations of Glycine max and Glycine soja with different salinity tolerance,including Lee68 and BB52(the salt tolerant),Suxie No 1 and N23232(the salt sensitive)as studying materials,the effects of light(-0 55 MPa)and heavy(-1 10 MPa)isoosmotic stress(Na +,Cl - and NaCl)on growth of seedlings,electrolytic leakage,and contents of chlorophyll and carotenoid in leaf were investigated on the aspect of salt ion injury.The results showed that in phase of seedlings,the plant height,root fresh weight and volume,and electrolytic leakages in leaf were all affected by light and heavy isoosmotic stress of Na +,Cl - and NaCl,but there was no significant difference between the treatment of Na + and Cl - whereas the NaCl treatment showed stronger injury effect.So Na + and Cl - were all toxic ions of salt injury in soybean.