In fact, oranges are not orange

Orange pulp has a bright orange color, but peel them actually - green, especially oranges growing in the warm countries.

Most oranges with green skin - ripe, they become orange by as slowly beginning to rot. Green peel from orange does not mean that the fruit is not ripe or what color it - unnatural, fruit simply accumulate chlorophyll. In warm sunny countries that chlorophyll often it remains in the fruit, and only when the fetus is exposed to freezing, the chlorophyll breaks down slowly and, as a result of which the skin turns orange.

In countries located near the equator, oranges remain green all year round. In northern latitudes, oranges, grown in early spring or late fall, naturally ryzheyut, the same who grow up in the midst of summer, too, tend to remain green. By the way, rusty oranges may again turn green if absorb enough of their own chlorophyll from leaves.

Since most people think green unripe oranges, then commercially available fruits should have a bright orange color. In some cases, this is exposed to ethylene gas, which destroys chlorophyll, and sometimes for the same purpose intentionally peremorazhivayut fruit is coated with wax or even dipped in the dye.

via factroom.ru