黄瓜缺硼症状与激素变化关系的研究

Study on relationship between B-deficiency symptoms of cucumber and changes of endogenous hormone

在营养液培养条件下 ,研究了黄瓜缺硼处理不同时间外部症状及其体内乙烯和IAA含量变化。结果表明 ,缺硼处理后 5d ,黄瓜幼叶开始出现缺硼症状 ;叶片中IAA含量降低发生在缺硼处理后处理后 3d ,即缺硼症状出现之前 ;乙烯释放量增加则发生在处理后 5d ,是伴随缺硼症状出现而升高的 ;生长点中IAA累积则发生在缺硼处理后处理后 6d ,即缺硼症状出现之后。黄瓜根尖在缺硼处理 3d ,缺硼症状就十分明显。

The boron deficiency symptoms, the release of ethylene, and IAA content of cucumber at different time after boron deficiency treatment were studied with solution culture The results showed that the young leaf of the cucumber began to take on boron deficiency symptoms after 5 days boron deficiency treatment; and at the same time, the release of the ethylene also began to increase But the content of IAA in leaves decreased after 3 days boron deficiency treatment, which happened before the appearance of boron deficiency symptoms The content of IAA in the tip of stem didn't increase till 6 days treated The unbalance of IAA contents between leaf and stem tip might be the cause of boron deficiency symptoms