钾胁迫对不同耐低磷基因型玉米生长和磷吸收的影响  

Effects of K Stress on Growth and P Uptake of Different Genotypes Maize

作　　者：章爱群[1] 斯琴朝克图[1] 王立华[1] 王有宁[1] 

机构地区：[1]湖北工程学院特色果蔬质量安全控制湖北省重点实验室,湖北孝感432000

出　　处：《湖北农业科学》2015年第2期292-295,共4页Hubei Agricultural Sciences

基　　金：湖北省教育厅重点项目(D20132703);湖北省自然科学基金项目(2014CFB4527);湖北工程学院创新团队项目(T2014001)

摘　　要：研究了不同耐低磷基因型玉米(Zea mays L.)幼苗对低钾胁迫适应性的差异。结果表明,低钾胁迫处理对株高有显著的抑制作用,低钾胁迫处理显著降低了植株的地上部和根系吸磷量,同时还使玉米根效比显著下降,且耐低磷基因型降低程度更为显著。低钾胁迫处理使地上部和根系的磷利用率增加,基因型间无明显差异。Adaptive differences of different phosphorus tolerance maize seedlings to low K-stress were studied. The results showed that K-stress severely hindered the growth of maize. K-stress had a negative influence on plant height. K-stress severely decreased the P absorbing of shoot and root. The effect of K-stress on low-P tolerant genotypes was more than that of low-P sensitive genotypes in root efficiency ratio at seedling stage. Under K-stress condition,the P utilization efficiency in shoot and root of genotypes was significantly increased with no differences among different genotypes.

关 键 词：玉米(Zea mays L.) 耐低磷 钾胁迫 

分 类 号：S513[农业科学—作物学] Q945.78[生物学—植物学]