Home | | Botany 11th std | Tap root modification

Chapter: 11th Botany : Chapter 3 : Vegetative Morphology of Angiosperm

Tap root modification

Tap root modification
a. Storage roots b. Breathing root

Tap root system

 

Primary root is the direct prolongation of the radicle. When the primary root persists and continues to grow as in dicotyledons, it forms the main root of the plant and is called the tap root. Tap root produces lateral roots that further branches into finer roots. Lateral roots along with its branches together called as secondary roots.


Tap root modification


a. Storage roots

 

1.  Conical Root

 

These are cone like, broad at the base and gradually tapering towards the apex. Example: Daucus carota.

 

2.  Fusiform root

 

These roots are swollen in the middle and tapering towards both ends. Example: Raphanus sativus

 

3.  Napiform root

 

It is very broad and suddenly tapers like a tail at the apex. Example: Beta vulgaris


 

b. Breathing root

Some mangrove plants like Avicennia, Rhizophora, Bruguiera develop special kinds of roots (Negatively geotropic) for respiration because the soil becomes saturated with water and aeration is very poor. They have a large number of breathing pores or pneumatophores for exchange of gases.

 



Study Material, Lecturing Notes, Assignment, Reference, Wiki description explanation, brief detail
11th Botany : Chapter 3 : Vegetative Morphology of Angiosperm : Tap root modification |

Related Topics

11th Botany : Chapter 3 : Vegetative Morphology of Angiosperm


Privacy Policy, Terms and Conditions, DMCA Policy and Compliant

Copyright © 2018-2024 BrainKart.com; All Rights Reserved. Developed by Therithal info, Chennai.