may begin as chloroplasts but lose chlorophyll and accumulate carotenoids to become chromoplasts
during fruit ripening and other processes.
Molecular oxygen and the state of geometric isomerism of intermediates are essential in the carotene desaturation and cyclization reactions in daffodil chromoplasts
Later on, from pollen mitosis, chloroplasts further develop into chromoplasts
by accumulating plastoglobules in the stroma (F ig.
The production of the normal red colour of ripe fruit is due to the destruction of chlorophyll and the extensive accumulation of the carotenoids (lycopene and [beta]-carotene) while the chloroplasts are transformed into chromoplasts
plastids: Any of several pigmented cytoplasmic organelles including chloroplasts, chromoplasts
, and leucoplasts.