试验以玉米品种郑单958为材料，研究了低温胁迫下A、B 两种抗低温助长剂不同浓度药剂对玉米种子发芽及其生理生化变化的影响。结果表明，低温逆境下各化控处理均提高了郑单958的种子发芽势、发芽率、发芽指数和种子简易活力指数；A、B两种药剂处理比对照都明显提高了低温胁迫下玉米幼苗的苗高、干物重、叶面积以及叶绿素含量，起到了良好的壮苗作用。在低温胁迫后，各化控处理都显著提高了叶片SOD、POD的活性，减缓了MDA含量的增高。

The effects of two kinds of chemical regulators with different concentration on corn seeds and physiological and biochemical changes in corn Zhengdan958 were investigated under low temperature stress condition (5 - 6℃). The results showed that after exposure of germinating seeds to low temperature stress, the germination energy, germination percentage, germination index and seed vigor index in Zhengdan958 soaked with any of chemical regulation treatments under low temperature stress were higher than those of the unsoaked controls; In the meantime, the seedlings height, dry matter weight, leaf area, chlorophyll content of maize seedling under low temperature stress was elevated by A, B two kinds of concentration, indicating positive effect on strengthening maize seedling. After 4 days under low temperature stressed, increased activity of superoxide dismutase(SOD), peroxidase (POD) of leaves with any of chemical regulation treatments, the degree of increase in malondialdehyde (MDA) content was decelerated.

“十一五”国家科技支撑计划项目(2006BAD02A13)、中央级公益性科研院所基本科研业务费专项