Example of Tap Root Tubers (Root Modifications)

Tap root are modified mainly for storage of food. They are known as tubers.  Based on shape tap root tubers are classified into four groups.
a) Fusiform tubers: A swollen root tapering at both ends is called fusiform.
fusiform- radish Example: Radish (Raphanus sativus)
b) Napiform tubers: The root is globular and tapers abruptly at the base.
Napiform- beet root Example: Beet root (Beet vulgaris), Turnip (Brassica campestris)
c) Conical tubers: The root is broad at the top and tapers towards the lower end like a cone.
Conical - Carrot Example: Carrot (Daucus carota)
d) Tuberous roots: The root is thick and fleshy. It has no definite shape.
Tuberous roots- Mirabilis jalapa



Example: 4 o’ clock plant (Mirabilis jalapa)
See also: Adventitious roots tubers
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