In swampy area like the sunderbans in West Bengal, plants bear special kind of roots called........
Pneumatophores Roots are the organs meant for the absorption of water and minerals from the soil. Cells of roots require O2 to respire. In swampy area, soil does not have air, so no O2 is available to them.
In such cases, roots come out of the soil shows negative geotropism and breathe after coming with air, e.g., Rhizophora. Such roots are called pneumatophores respiratory roots.