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♤ Taproot - Primary descending root formed by the direct prolongation of the radicle of the embryo.
♤ Lateral Root - Roots that arise from the tap root and spread laterally to support the tree.
♤ Adventitious Roots - Roots that are produced from the parts of the plant other than the radicle or its subdivision. The following kinds of Adventitious Roots are commonly found in trees.
♤ Buttresses - They are out - growths formed usually vertically above the lateral roots and thus connect the base of the stem with roots. They are formed in the basal portion of the stem.
♤ Ex: Silk cotton tree.
♤ Prop - Roots - Adventitious Roots - produced from the branches of the tree which remain suspended in the air till they reach the ground. On reaching the ground they enter into the soil and get fixed.
♤ Ex: Banyan Tree
♤ Stilt - Roots - Adventitious Roots which emerged from the butt of a tree above ground level. So that the tree appears as if supported on flying buttresses.
♤ Ex: Rhizphora species of mangroves.
♤ Pneumatophore: It is a spike like projection of the roots of swamp / mangrove tree above the ground. It helps the submerged roots to obtain oxygen.
♤ Ex: Heretiera spp, Bruguiera spp.
♤ Haustorial roots are the roots of parasitic plants that can absorb water and nutrients from another plant.
♤ Eg: mistletoe (Viscum alubum) and dodder.
♤ Storage roots are modified roots for storage of food or water, such as carrots and beets. They include some taproots and tuberous roots.
♤ Mycorrhiza - structure produced from the combination of the modified rootlet with fungal tissue.
Do you know?
1. A tree can absorb as much as 48 pounds of carbon dioxide per year and can sequester 1 ton of carbon dioxide by the time it reaches 40 years old.
2. Tree wood is a highly organized arrangement of living, dying, and dead cells.