河南农业大学学报2013，Vol.47Issue(3)：241-244,4.
磁场对低温胁迫玉米幼苗生长和光合作用的影响
Effects of magnetic field on maize seedling growth and photosynthesis under cold stress
摘要
Abstract
The objective of this study was to investigate the effects of magnetic field pretreatment at 150 and 300 mT on maize seedling growth and physiological characteristics under 4 ℃ cold stress.The results showed that the damage to maize seedling growth caused by cold stress was significantly relieved with seeds treated by magnetic field.It can promote maize seedling growth by increasing total length,root activity and photosynthetic efficiency.The effect of 150 mT was more significant.The damage to maize seed caused by cold stress was significantly reduced in the presence of the magnetic strength of 150 mT.Specifically,the surface area of roots,total volume of root,and root activity increased by 69％,101％,and 1.72-fold,respectively; root dry weight and shoot dry weight increased by 0.61-fold and 1.56-fold,respectively.Stomatal conductance (Gs),intercellular CO2 concentration (Ci)and the photosynthetic rate (Pn) of leaves increased by 55.6 ％,44.6 ％ and 67.9 ％,respectively.Compared with 150 mT,the effect of 300 mT on maize seedling growth was significantly decreased.关键词
玉米/磁场/低温/根系/光合作用Key words
maize / magnetic field / cold stress/ roots / photosynthesis分类
农业科技引用本文复制引用
郭振生,信龙飞,邵瑞鑫,陈建辉,苗丰,冯一俭,杨青华..磁场对低温胁迫玉米幼苗生长和光合作用的影响[J].河南农业大学学报,2013,47(3):241-244,4.基金项目
中国科学院知识创新工程重大项目(KZCX2-YW-JC408) （KZCX2-YW-JC408）
河南省科技创新人才计划支持项目(114100510019) （114100510019）
