光周期及春化处理对洋葱蛋白质合成代谢与POD活性的影响

以3种不同抽薹性洋葱为试材,采用不同光周期及春化处理,研究洋葱对不同光周期及春化的生理生化反应.结果表明:延长光照可不同程度提高洋葱幼苗可溶性蛋白质及游离氨基酸含量,提高POD活性.14h及16 h光照均有较好的长光周期效应,以16 h更有效;暗期白光及红光中断亦有相同效果,其中以红光最有效,蓝光则无长光周期效应.春化初期,洋葱生长点部位叶片游离氨基酸与可溶性蛋白质含量先下降后上升,POD活性处理一段时间后上升,完全春化后则与春化处理前期水平相近.所用3个洋葱品种对光周期及春化反应基本一致.

Studies on the Changes of Nitrogen Metabolism and Peroxidase Activity in Onions during Different Photoperiod and Vernalization

With three different bolting onions as experimental materials, the effects of nitrogen metabolism and peroxidase were studied by different photoperiod and vernalization. The result showed that the contents of soluble protein and free amino acid were increased, POD activity were elevated by prolong bright. The 16h long bright was even notable. The effect can also be induced by dark-break, the red light was remarkable, but the blue light did not have the effect. The contents of soluble protein and free amino acid, POD activity were declined first and then increased at early vernalization. After full vernalization, the contents of soluble protein and free amino acid, POD activity were near early vernalization. Different bolting onions have the same changes.