Plastids
These are organelles in plant cells, divided into three types: chloroplasts, which contain the green pigment chlorophyll and perform photosynthesis. Photosynthesis occurs on the inner membrane of the chloroplast, folded into stacks called grana. Leucoplasts are white or colorless, storing starch; and chromoplasts with red, yellow, or orange pigments, accumulating nutrients or harmful substances that make flower petals bright to attract insects. Plastids can transform into each other, for example, chloroplasts can become chromoplasts as leaves age or fruits ripen.