植物花色素代谢途径改变机理及应用

The Mechanism of Floral Color Change and Application

花色作为重要的观赏性状是育种工作者追求的目标。然而花色在生化和遗传上都极为复杂。很多植物呈现有限的花色范围,是因为缺乏必要的基因或者是由于酶对底物的特异性引起的。采用多种基因工程技术,例如,反义抑制、共抑制、RNAi、突变体的应用以及多基因共同导入等可以为人们提供崭新的思路和途径,改变植物花色素代谢方向,创造出自然界不存在的新花色。

Flower color mainly determined by anthocyanins is a very important trait. Many factors can affect floral color. Each plant species usually accumulates limited kinds of anthocyanins and exhibits limited flower color by the expression of a specific set of biosynthetic genes,the substrate specificity of key enzymes and/or the temporal and spatial regulation of the biosynthetic genes. Gene engineering technology is helpful to the study of the regulation of natural floral color change. By using engineering technology ,such as antisenee,co-supression, RNAi and muhipal gene regulation,the anthocyanic biosynthetic pathway could be modified.