Short note about nastic moement

Nastic movement*

1. Movement of a plant part as a
response
2. to a non directional stimulus/
diffused stimulus/general stimulus
3. in a pre determined direction
4. Temperature/Relative Humidity/
Ordinary lighting/Darkness/Touch
are
stimuli for it
5. Takes place in specialized organs
6. Example: Flowers/Stomatal Guard
Cells/Pulvinas
7. Nastic movements that occur due
to turgour changes are called
turgour
movements
8. Photonasty – Opening of stomata
in the presence light
9. Nictynasty – Closing of stomata in
dark
10. Stomatal Guard Cell movement
11. Abscisic acid stimulates closing
of guard cells
12. K+ and Cl- ions involve in the
movement guard cells
13. ATP is required in Guard cell
movement
14. Legume/Sesbania leaflets erect
in the presence of light
15. Leaflets of these plants fold in
the presence of dark
16. Thigmonasty
17. Folding of Mimosa pudica leaves
when touched
18. All turgour movements are
reversible
19. Nastic movements by growth are
Growth nasty
20. Blooming of flowers in the light
and closing of them in the dark
21. Daisy flowers
22. Ethylene is connected to it
23. Most of the growth nastic
movements are irreversible

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