【摘要】 [目的]探讨Na+影响下小麦幼苗生长量和超氧化物歧化酶活力的变化。[方法]以烟麦19为供试小麦品种,采用不同浓度及不同配比的Na+溶液处理小麦幼苗,采用比色法测定超氧化物歧化酶活性。[结果]各处理的小麦地上部分生长量均低于对照,0.200mol/LNaCl处理的小麦地上部分生长量最低,0.100、0.150和0.200 mol/LNaNO3处理的小麦生长量明显高于其他处理。处理组1和2的小麦生长量均呈降低趋势;处理组3和4的小麦生长量呈先上升后下降的趋势;处理组5的小麦生长量呈先下降后上升的趋势。随着Na+和Cl-浓度升高,SOD酶活性下降。[结论]高浓度Na+对小麦生长有明显的抑制作用。相同Na+浓度下,高浓度Cl-降低小麦生长量,低浓度Cl-对小麦生长有一定的促进作用。超氧化物歧化酶活力与Cl-吸收量有关。更多还原

【Abstract】 [Objective] The purpose was to discuss the changes of growth increment and superoxide dismutase(SOD) activity of wheat seedlings under the influence of Na+.[Method] With Yanmai19 as tested wheat variety,the wheat seedlings were treated with Na+ solutions of different concn.and different matches and the SOD activity was determined by using colorimetry.[Result] The aerial growth increments of wheat in various treatments were lower than that in CK and that in the treatment with 0.200 mol/L NaCl was lowest;the growth increments of wheat in the treatments with 0.100,0.150 and 0.200 mol/L NaNO3 were obviously higher than that in the other treatments.The growth increments of wheat in the treatment groups 1 and 2 all showed decreasing trend;that in the treatment groups 3 and 4 all showed the trend of first increasing and then decreasing;that in the treatment group 5 showed the trend of first decreasing and then increasing.As the concn.of Na+ and Cl-were increased,the SOD activity was decreased.[Conclusion] Na+ at high concn.had obvious inhibition action on wheat growth.Under the same concn.of Na+,Cl-at high concn.reduced the growth increment of wheat and Cl-at low concn.had some promoting action on wheat growth.The SOD activity was related to absorbed dose of Cl-.更多还原