小胖紙 发表于 2013-6-11 23:27
是染色的,我买过根部还是白色,花的部分染色。
No, it's suppose to be like that in colour. The colour of the flower is due to the production of pigment in the flower due to expression of pigment gene in the flower. It's just like other flowers, like the roses you see, the stem and leave will be different colour to the flower. If the flower is colored using dye, then the stem and leave will be coloured as well because the method used to colour the flower involves soaking the stem of the plant into the dye. Capillary action will distribute the colour pigment throughout the plant. So if the cauliflower is colored and sing dye, it will be colored for the entire plant and not just the flower. You must have skipped many science lesson when you were at school. : |