水杨酸对大蒜鳞茎形成及其保护酶活性的影响

Effects of SA treatments on bulb formation and activity of protective enzymes in garlic

为探寻反季节栽培大蒜生产的理论和技术,实现新鲜大蒜的周年供应,丰富设施栽培结构模式和减轻连作障碍。以两个大蒜品种为试材,在反季节栽培条件下,研究了叶面水杨酸(SA)处理对大蒜鳞茎形成、产量及鳞茎形成过程中过氧化物酶(POD)、超氧化物歧化酶(SOD)、过氧化氢酶(CAT)活性的影响。结果表明,不同质量浓度SA处理均能促进大蒜的鳞茎比率和假茎粗,抑制大蒜的株高和假茎长的增长,增加蒜瓣质量、蒜头质量和蒜头产量,提高大蒜鳞茎中POD、SOD的活性,抑制CAT的活性,且以200 mg/L处理的效果最显著。说明SA能显著促进大蒜鳞茎膨大和质量增加,以200 mg/L处理的效果最好,SA对大蒜植株生长有抑制作用;SA能够提高大蒜鳞茎中POD、SOD的活性,抑制CAT的活性。

Effects of foliage application of salicylic acid （SA） on bulb formation,bulb yield and activity of protective enzymes in the course of bulb formation were studied in two mature types of garlic cultivars in the off-season planting conditions in order to find out the theoretical and technical basis for the off-season garlic＇s production, supply the fresh garlic bulb in whole year ,enrich the mode of facility cultivation and alleviate the obstacle of continuous cropping. The results indicated that the SA treatment of different concentrations promoted bulbing radio and pseudostem width,restrained plant height and pseudostem length, heightened bulb weight,clove weight and bulb yield ,increased the activity of peroxidase （POD）,superoxide dismutase （SOD） but decreased activity of catalase （CAT） in garlic bulb. And the effect.of 200 mg/L treatment was the prominentest in all of SA treatments. Therefore,SA can promote bulb swelling and mass accumulating and restrain the growth of garlic plant. And SA increases the activity of peroxidase （POD） and superoxide dismutase （SOD） and decreases activity of catalase （CAT） in garlic bulb.