苗期叶面喷施6-BA对玉米硝酸还原酶活力的影响

The Effect of 6-BA on NRA of Corn Seedling by Leaf Spraying

以郑单958为材料,3叶期叶面喷施不同浓度的6-BA,研究6-BA对不同器官硝酸还原酶活性的影响。结果表明,3叶期玉米叶鞘、叶片和根组织中NRA表现为叶鞘>叶片>根系;叶片中NRA含量表现为由基部向上数倒1叶>倒2叶>倒3叶;叶面喷施10～100 mg/kg6-BA溶液提高了叶片中硝酸还原酶的活性,降低了根组织中硝酸还原酶的活性,对叶鞘中硝酸还原酶活性影响没有规律性;200 mg/kg6-BA溶液可以提高叶片、叶鞘和根组织中硝酸还原酶活性。

Zhengdan958 was taken as testing material and spraying different concentration 6-BA solution on the leaves surface at 3 leaves stage for studying the 6-BA effect on the nitrate reductase activity. The result showed that in 3 leaves stage, the NRA of leaves and leaf sheath was higher than that in root, the NRA of leaf sheath was higher than that of leaves. From bottom to apex, the NRA of the 1 leaf was higher than that of the 2, that of the 2 was higher than that of the 3. The NRA of leaves and leaf sheath and root had been changed by leaves surface spraying of 6-BA treat- ment. lO to 100 mg/kg 6-BA had promoted the NRA of leaves and had debased the NRA of root, but it had no regularly regulation on the leaf sheath. But the NRA of leaf and leaf sheath and root were promoted by 200 rag/kg 6-BA treatment.