Study of repression mechanisms for ethylene biosynthetic genes in mutant carnation.

（1）长瓶插寿命品种‘奇迹胭脂’在花衰老过程中乙烯释放量很低。与对照品种相比，长寿品种的Dc-ACS 1、Dc-ACO 1、Dc-EIL 3和Dc-EIL 4的水平较低。这一发现表明，低水平的这些基因与低乙烯产生长瓶插寿命康乃馨。(2)我们发现了一个超长寿的康乃馨系，瓶插寿命约为30天。Dc-CPIn基因在超长寿品系和长寿品种中的表达水平不同。在不久的将来，我们将尝试用修饰的Dc-CPIn基因表达的转基因香石竹。

(1)Long vase life cultivar, 'Miracle Rouge' showed little ethylene production during flower senescence. The level of Dc-ACS1,Dc-ACO1,Dc-EIL3 and Dc-EIL4 in long life cultivar was low compared to control cultivar. The finding suggests that low level of these genes relate to low ethylene production in long vase life carnation. (2) We found a carnation line with ultra-longevity which had vase life of about 30 days. Level of Dc-CPIn gene was different between the line with ultra-longevity and the long life cultivar. In the near future, we will try making the transgenic carnation with modified Dc-CPIn gene expression.