Control and Coordination in plants
Have you seen the Touch-Me-Not plant ( Mimosa pudica ) ?
How does it behave when touched ?
Th e leaves curl away and droop.
This is how the Touch-Me-Not plant responds to touch .
Think about a seed germinating ,
- Roots grow in the downward direction
- Shoot containing stem, leaves, flowers etc. grow in the upward direction .
This is another kind of response displayed by plants.
Observe the two kinds of responses;
We know plants do not have nervous systems or muscles for movement. So what causes these responses to stimuli in plants?