The final phase of differentiation is often characterized by the presence of chromoplasts
in various tissues, including senescent leaves, fruit pulp, and petals (Ljubesic et al.
As a result, the researchers believe they may be able to use specific proteins to regulate the functions of chloroplasts -- such as the conversion of chloroplasts into highly-pigmented chromoplasts
during the ripening of fruit.
Red bell pepper Loose parenchyma cells with small red/orange chromoplasts
Lutein and zeaxanthin are associated with chloroplasts or chromoplasts
Carotenoids are organic pigments that naturally occur in the chloroplasts and chromoplasts
of plants and some other organisms, such as algae, some types of fungus and some bacteria.