施钙对甘薯铝胁迫的缓解效应  

Effects of calcium application on alleviation of aluminum stress to sweet potato

作　　者：李清华[1] 刘庆[1] 李欢[1] 史衍玺[1] 

机构地区：[1]青岛农业大学资源与环境学院,山东青岛266109

出　　处：《中国土壤与肥料》2016年第4期124-127,132,共5页Soil and Fertilizer Sciences in China

基　　金：国家甘薯产业技术体系营养与栽培生理项目(CARS-11-B-14)

摘　　要：采用土培试验方法,以铝敏感型甘薯品种商薯19号为研究材料,设置不同的钙处理水平(0、0.8、1.6、2.4 g/kg),研究了钙对甘薯铝胁迫(1 g/kg)的缓解效应。结果表明:施钙可以显著促进甘薯根系的生长发育,提高叶片叶绿素含量和PSⅡ(PhotosystemⅡ)最大光化学效率(Fv/Fm),提高叶片中超氧化物歧化酶、过氧化氢酶和过氧化物酶活性,降低叶片中丙二醛的积累量。施钙可以有效提高甘薯对铝胁迫的抗逆性,有效缓解铝对甘薯的胁迫。Using the Shangshu 19 as plant material,alleviation effects of various concentration of calcium on aluminum stress of sweet potato were examined by soil culture experiment. Different levels of aluminum levels（0,1 g/L） and calcium treatment levels（0,0.8,1.6,2.4g/L） were used to study the different concentration of calcium on aluminum toxicity of sweet potato. The results showed that under the stress of aluminum,increased calcium supply alleviated the toxicity by aluminum,significantly weaken the aluminum stress to the root activity,calcium content in leaf and potato,the leaf chlorophyll content,PSⅡand Fv/Fm,the blade SOD and POD,the accumulation of lower malondialdehyde（MDA） content,and improved the plant resistance to aluminum stress.

关 键 词：甘薯 钙 铝胁迫 酶活性 叶绿素荧光参数 

分 类 号：S531[农业科学—作物学] S143.7