镉胁迫下硅对水稻幼苗根生物量及其镉含量的影响  

Effect of Silicon under Cadmium Stress on the Biomass and Cadmium Content of Oryza sativa Seedling Root

作　　者：黄秋婵[1] 韦友欢[1] 韦方立[1] 曾振芳[1] 

机构地区：[1]广西民族师范学院化学与生物工程系,广西崇左532200

出　　处：《贵州农业科学》2011年第3期66-68,共3页Guizhou Agricultural Sciences

基　　金：广西教育厅科研基金资助项目"硅对镉胁迫下水稻幼苗抗氧化酶活性及其生理特性影响的研究"(200911MS275);广西高校优秀人才资助计划资助项目"硫脲类衍生物配位化合物的合成;结构与生物活性的研究"(RC2007043);广西民族师范学院科研基金资助项目"硅对镉胁迫下水稻幼苗抗氧化酶活性影响的研究"(ybxm200918)及"硅对铅胁迫下水稻幼苗的解毒作用及其机制研究"(xyzd2010001)

摘　　要：为阐明硅缓解镉对水稻幼苗的毒害机制提供理论依据,采用溶液培养试验,研究不同浓度的硅对镉胁迫下水稻幼苗根生物量及其镉含量的影响。结果表明：在硅镉胁迫下（4 mg/L）,SiO2浓度30~180mg/L范围内,随着浓度的增加,根鲜重和干重呈现出增加趋势,当浓度≥30 mg/L时,根鲜重分别为无镉胁迫处理的68.02%、85.59%、86.63%、84.25%,根干重分别为无镉胁迫处理的86.25%、92.22%、99.66%、95.99%;浓度为130 mg/L时,根的干重接近无镉胁迫处理的生物量;在镉胁迫下,经SiO2缓解的根的镉含量均比无SiO2缓解的低。Effect of silicon under cadmium stress on the biomass and cadmium content of Oryza sativa seedling root was studied by solution culture method to provide theoretical basis for clarifying the remitting mechanism of Si on Cd stress.The results showed that the fresh weight and dry weight of root under Cadmium stress（4 mg/L）showed an increasing trend with the increase of SiO2 concentration（ranging from 30~180 mg/L）.When the SiO2 concentration was above 30 mg/L,the root fresh weight and dry weight of different treatments are 68.02%,85.59%,86.63%,84.25% and 86.25%,92.22%,99.66%,95.99% of CK（without cadmium stress）,respectively.The root dry weight was close to CK when the SiO2 concentration was 130 mg/L.The Cd content of root treated with SiO2 was all lower than CK.

关 键 词：硅 镉胁迫 水稻 生物量 

分 类 号：S511[农业科学—作物学]