Question

Write short note about modification of roots

Answer 1

"Modification of roots, 1. Root the part of a plant that attaches it to the ground or to a support.
2. pneumatophores are roots that grow into the air and are filled with a specialised parenchyma called aerencyma."

Answer 2

$\huge\textbf{Modification of Roots...}$

Roots are modified on the basis of :-

$\textbf{1) Support.}$

$\textbf{2) Respiration.}$

$\textbf{3) Storage.}$
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$\textbf{1) Support :}$ The stems of maize and sugarcane have supporting roots coming out of the lower nodes of the stem. These roots are Known as still roots.

$\textbf{2) Respiration :}$ In some plants such as Rhizophora grow in swampy areas, many roots come out of the ground and grow vertically upwards. Such roots are called Pneumatophores help to get oxygen for oxygen.

$\textbf{3) Storage :}$ In some plants the primary tap roots are modified for storing reserve food material. The storage roots are swollen and assume various forms.

$\textbf{a) Conical :}$ The swollen root is board at the base and tapers gradually towards the apex giving a shape of Conical. 
Ex :- Carrot.

$\textbf{b) Fusiform :}$ The root is swollen at the middle and narrow towards both it's base and apex giving a shape of spindle. 
Ex :- Radish.

$\textbf{c) Napiform :}$ The root is nearly globular or spherical in shape. The basal portion of root is much swollen which suddenly tapers towards the apex giving a top shaped. 
Ex :- Turnip or beet.

$\textbf{d) Tuberous :}$ The storage food having no fixed shape.
Ex :- Mirabilis Jalapa.
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