The essential functions of roots are anchorage and absorption of water and minerals in the terrestrial plant. What functions are associated with the roots of aquatic plants ? How are roots of aquatic plants and terrestrial plants different ?

$\rightarrow$ Generally terrestrial root show network of branches that functions to absorb water and minerals from the soil and to fix in the soil.

$\rightarrow$ While in aquatic plants modifications of their normal functions and deviations are seen e.g. In Trapa, Tinospora like plants root are green and much branched that increases area for photosynthesis. While in plants like Jucia, they become like ballons because air comes outside of water. So plant can float on water and can do exchange of gases.

$\rightarrow$ Difference between Aquatic Root and Terrestrial Root

Aquatic Root	Terrestrial Root
$(1)$ Root is absent e.g. Wolffia. If root is present, it is not well developed. Generally thin adventitious roots.	$(1)$  Root is well developed, root cap and root hair, branches present.
$(2)$ Vascular tissue are less developed.	$(2)$ vascular bundles are well developed.
$(3)$ They are modified for photosynthesis, food storage and exchange of gases.	$(3)$ Provides fixation and help in absorption of minerals from soil.