Page 242 - Primary Six Notes

Tropism

This is the growth movement of plants to response to a stimu-
lus (singular) stimuli (plural).

It is the plant response towards stimuli

A stimulus

Is defined as any change in the environment to which the plant
is sensitive to the type of stimulus involved

There are five different kinds of tropisms. Namely.

1. Phototropism

2. Geotropism

3. Hydrotropism

4. Thigmotropism/haptotropism

5. Chemotropism

1. Phototropism

This is the growth movement of plant shoot towards light.
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