What are the different modifications of adventitious roots? Explain with examples.
Modifications of adventitious roots are: - a) Tuberous Root: It is a swollen root with no specific shape. Example: - Sweet potato. b) Fasciculated Root: - It is a cluster of tuberous roots that emerges from the same location. They have a specific shape. Example: - Dahlia and Asparagus. c) Beaded Root: These roots have swollen parts that appear at regular intervals. Example: - Portulaca and Vitis. d) Prop Root: These are pillar-like roots. They hang vertically downward from an aerial branch of a plant. Example: - Banyan tree. e) Stilt Root: - The roots are short and grow obliquely from near the base of the main stem. They give the stem stability and support. Example: - Sugarcane, maize and sorghum. f) Parasitic Root: These roots penetrate the host cells and absorb nutrients from the host tree. Example: - Cuscuta. g) Assimilatory Root: Adventitious roots of some plants turn green to perform photosynthesis and are referred to as assimilatory roots. Example: - Tinospora and Trapa.
