硅作用下铜对小麦幼苗生理特性影响研究

Impact Study of Cu on Physiological Characteristics of Wheat Seedling at the Action of Si

通过水培试验,研究了在不同加硅量(0,30,60,90,120,150 mg/L,以SiO2计)作用下,铜(10 mg/L,以Cu计)对小麦幼苗叶绿素含量、抗氧化酶系统活性(SOD、POD、CAT)、脯氨酸含量、可溶性蛋白含量以及MDA含量的影响,结果表明:在加硅量(30,60,90 mg/L,以SiO2计)作用下,小麦幼苗叶绿素a含量、抗氧化酶系统(SOD、POD)活性、脯氨酸含量、可溶性蛋白含量的升高以及MDA含量的降低,减轻了铜对小麦幼苗的毒害作用;在加硅量150 mg/L作用下,小麦幼苗叶片可溶性蛋白含量的降低,MDA含量的升高,加重了铜对小麦幼苗的毒害作用。研究结果表明,加硅处理能够在一定浓度范围内缓解铜对小麦幼苗的毒害作用,从而为铜毒害的小麦区域增施硅肥提供理论依据。

The water culture experiment was conducted to investigate the effects of Cu（10 mg/L）on chlorophyll content,antioxidant enzyme system activity（SOD,POD,CAT）,proline content,soluble protein content and MDA content of wheat seedling with different concentrations of Si（0,30,60,90,120,150 mg/L,SiO2）.The results showed： At the action of Si（30,60,90 mg/L,SiO2）,chlorophyll-a content,antioxidant enzymes system（SOD,POD） activity,proline content,soluble protein content of wheat seedling increased and MDA content droped,alleviating the toxicity of Cu on wheat seedlings;At the action of Si 150 mg/L,soluble protein content of wheat seedlings leaves decreased,MDA content increased,aggravating the toxicity of Cu on wheat seedlings.Results indicated that Si could alleviate the toxicity of Cu on wheat seedlings in certain concentration range,providing the theoretical basis of increasing silicon fertilizer at the wheat regional of Cu poison.