Page 1 - 2.Lesson Notes- The Root System, Modifications of roots

SAI International School
Subject - Biology, class-VI
Topic- The Plant world
Subtopic- The Root system, Modifications of roots
Module- 16
Lesson notes

Parts of a plant :

 A plant has two main parts- The Root system and the shoot system.
 The part of the plant that is seen above the soil is the shoot system of the plant and
the part of the plant present under the soil is the root system.
 The shoot consists of stem, branches, leaves, buds, flowers and fruits.
 The root system consists of the main root and the lateral roots.

The Root system:
 There are two types of root systems seen in plants – Tap root system and Fibrous root
system.

.

Differences between a tap root system and fibrous root system

Tap root system Fibrous Root system
Root develops from the radicle of the A cluster of roots develop from the base

seed of the stem

Roots persist throughout lifetime Roots are short lived
Roots grow deep into the soil Roots do not grow deep into the soil.

Occurs in dicots Occurs in monocots

Tap root has a main root from which Many roots arise as a tuft from the base
lateral branch roots (secondary roots and of the stem

tertiary roots develop)
Example Mango, gram, pea etc. Example maize, paddy, wheat etc.