老化玉米种子修复处理后的活力效应研究

Dynamic Effect of Aging Maize Seed after Repairing Treatment

以玉米自交系Mo17种子为试材,对不同老化水平的玉米种子进行氯化钙(CaCl2)、抗坏血酸(AsA)、聚乙二醇(PEG)、青霉素(Penicillin)和赤霉素(GA3)修复处理。结果表明,500 mg/L AsA对Mo17老化玉米种子的活力修复效果明显;0.015 mg/LCaCl2对不同老化程度的玉米种子修复范围较宽,修复作用较好;100 mg/L Penicillin处理只对中活力玉米种子有修复作用;500 mg/L GA3对不同老化程度玉米种子的修复作用不明显;20%PEG处理对老化玉米种子没有修复作用,且加速了高活力种子的活力衰退。500 mg/LAsA处理老化玉米种子其修复效应明显,修复作用比较温和,在生产中能提高发芽率70%以下的玉米种子活力,是较为理想的修复剂。

The effects of polyethylene glycol,calcium chloride,ascorbic acid,penicillin,gibbereollic acid,magnetic field treatments on two different artificially aging maize cultivars Mo17 were analyzed.The result showed that calcium chloride（0.015 mg/L） treatments had better repairing effects and a wider range on maize seed of different aging degrees,penicillin（100 mg/L） treatments only had repairing effects on medium vigor of maize seed.Repairing effects of gibberellic acid（500 mg/L） was not obvious.Polyethylene glycol（20%） treatments had not repairing effects on aged maize seed,and accelerated vigor recession of the high-vigor seed.Repairing effects of ascorbic acid（500 mg/L） treatments was the more obvious and more moderate,so it was more satisfactory repair agent in production to improve maize seeds which germination rate dropped below 70%.