The root is an underground part of the plant that absorbs water and minerals from the soil and anchors the plant firmly. In some plants, the roots change their shape and get modified to absorb and transport water and minerals from the soil to different parts of the plant. They are also modified for support, food storage, and respiration.
Assimilatory roots are type of modified root. These roots grow chlorophyll and turn into photosynthesis. They synthesize carbon dioxide, water and carbohydrates in the presence of sunlight.
Examples: Tinospora, podostemon and Taeniphyllum.