Thursday, December 8, 2011

Roots and Types of roots

Roots are the principal water-absorbing organs of a plant.
 There are three primary functions of roots: (1) to anchor the plant to a substrate, (2) to absorb water and dissolved minerals, and (3) to store food reserves. Typically we see roots in soil, but there are specialized types of aerial roots (air roots) that enable climbing plants and epiphytes to become attached to rocks, bark, and other nonsoil substrates. In addition, parasitic plants may form specialized haustorial roots that form an attachment disc to the host during the first stage of colonization.

TYPES OF ROOTS:

 OTHER TYPES OF ROOTS:

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