What is the significance of pollen odor and brightly colored petals of flowering plants?

I'm not sure it is actually the petals themselves that release perfume. I think it's another part of the flower. The purpose of the perfume is to attract a pollinator - insect, bat, bird or whatever. The reward for the pollinator is a meal of nector which is produced by the flower. As the pollinator rummages around in the flower for nectar, pollen will rub off on the animal and be transfered to the stigma to pollinate the flower.