DENDROLOGY

Detailed explanation-1: -Chromoplasts are plastids containing carotenoids. They lack chlorophyll but synthesize various other coloured pigments. Carotenoid pigments are responsible for different colors like yellow, orange and red color imparted to fruits, flowers, old leaves, roots, etc. Chromoplasts may develop from green chloroplasts.

Detailed explanation-2: -In photosynthetic tissues, chloroplasts can accumulate a moderate level of carotenoids, mainly to facilitate photosynthesis and environmental stress tolerance. However, chromoplasts from the storage tissues such as tomato fruit and carrot root can synthesize and accumulate carotenoids to a substantially higher level.

Detailed explanation-3: -The plastids are easily observed under the microscope because of their size as they are large. Depending upon their colour and the pigments present in them . they are of three main types that are leucoplasts, chromoplasts and chloroplasts.