Oranges and Yellows. Carotenoids are another group of pigments that can influence the colors of marijuana. They are created by plants, algae, and photosynthetic bacteria.

Carotenoids “Yellow, orange and red color in mature pepper fruits is a result of carotenoid metabolism and accumulation in the chromoplasts of the pericarp or fruit wall.

Carotenoids are natural pigments commonly produced by many plants. They tend to absorb light wavelengths in the blue and green range, giving them a red or orange color.

The insects known as aphids can make their own essential nutrients called carotenoids, according to new research. No other animals are known to make the potent antioxidants, which are crucial for ...

Carotenoids color the tailfins, but another class of pigments, called pterins, tint the anal fins either yellow or red. Yellow and red pterins are tied to differences in a single gene, Fuller said.

Carotenoids color the tailfins, but another class of pigments, called pterins, tint the anal fins either yellow or red. Yellow and red pterins are tied to differences in a single gene, Fuller said.