Describe the various movements of plants giving suitable examples.

There are basically two type of movements of plants, which are as follows:-

(a) Movement independent of the growth

(b) Movement dependent on the growth

Movement independent of the growth: - In this, the growth of a plant is not responsible for the movement. For e.g. in case of mimosa plant, the touch from external source makes the leaves to fold inwards. So, growth is not at all involved in this.

Movement-dependent on the growth: - In this, growth is involved. It is further of 4 types:-

(i) Geotropism: - In this gravity acts as the external stimuli and growth of the plant part is towards the gravity. E.g. roots of the plant grow downwards.

(ii) Phototropism: - In this light acts as the external stimuli and growth of the plant is towards the light. For e.g. shoot or stem.

(iii) Hydrotropism: - In this water acts as the external stimuli and growth are towards the water source.

(iv) Chemotropism: - In this chemicals acts as the external stimuli.