供硫水平对花生叶片硫素含量与形态的影响  

Effects of sulfur supply on sulfur content and conformation within peanut leaves

作　　者：周可金[1,2] 雷红灵[3] 肖文娜[1] 章力干[1] 

机构地区：[1]安徽农业大学农学院,安徽合肥230036 [2]湖南农业大学农学院,湖南长沙410128 [3]湖南农业大学生物科学技术学院,湖南长沙410128

出　　处：《植物营养与肥料学报》2008年第6期1154-1159,共6页Journal of Plant Nutrition and Fertilizers

基　　金：国际植物营养研究所项目(Anhui-17);安徽省教育厅项目(KJ2007B297)资助。

摘　　要：采用盆栽方法研究了供硫水平对花生不同叶龄叶片的硫酸盐、谷胱甘肽和蛋白态硫含量及其形态的影响。结果表明.叶片谷胱甘肽含量随叶龄增大而减少,硫酸盐含量却相反。当硫素供应充足时,幼叶谷胱甘肽含量占总硫的4.6%,蛋白态硫含量占91%,其余以硫酸盐形式存在;中龄叶及老叶的硫酸盐含量占总硫的60%～10%,而谷胱甘肽含量不到1%。当硫素供应不足时,幼叶和中龄叶含硫化合物总量减少,尤其是硫酸盐。因此,在缺硫时,谷胱甘肽不是植株硫的主要来源。且低氮加重缺硫症状发生。不同叶龄叶片对缺硫反应不同,幼叶对缺硫反应更为敏感。Greenhouse experiment was conducted to study content and conformation of sulfate （S）, glutathione, and insoluble S fraction within different aged peanut leaves. The content of glutathione decreased with the leaf aging increase, whereas an opposite trend was observed for SO4^2- content. The concentration of insoluble S was similar for all leaves. With the sufficient S supply, SO4^2- , glutathione, and insoluble fraction accounted for 4.4%, 4.6% and 91% of total S in the young leave, respectively. In the middle and old leaves, 60 % to 80 % of total S accumulated as SO4^2- , and glutathione accounted for less than 1%. The concentrations of all S-containing compounds, particularly SO4^2- , decreased in the young and middle leaves without S supply. Glutathione was not a major S source for peanut during S deficiency. Low N supply aggravated the symptoms S deficiency. The different aged leaves had no-unique responses to S deficiency. Young leaves are more sensitive to S deficient than middle and old leaves.

关 键 词：硫素供应 硫形态 谷胱甘肽 叶片 花生 

分 类 号：S565.2[农业科学—作物学]