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

(1)花瓶寿命较长的品种‘奇迹胭脂’在花衰老过程中乙烯产量很少。与对照品种相比，长寿品种Dc-ACS1、Dc-ACO1、Dc-EIL3和Dc-EIL4的水平较低。这一发现表明，这些基因的低水平与长花瓶期康乃馨的低乙烯产量有关。(2)我们发现了一个超长寿命康乃馨系，其花瓶寿命约为30天。Dc-CPIn基因水平在超寿系和长寿品种之间存在差异。在不久的将来，我们将尝试制作具有改良Dc-CPIn基因表达的转基因石竹。

(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.