Could someone help me in my project?
It is about 7 nastic movements with two examples each.
I need it urgently by tomorrow
1 Answer | Add Yours
Nastic movements are responses (usually of but not limited to plants) to stimuli. Unlike trophisms, these are not dependent on the direction of the stimulus.
- Photonasty - response to light. Examples: Vertical growth of plants towards light source; Change in orientation of cannabis leaves (from horizontal to vertical) during sun down.
- Nyctinasty - reponse to dark, or night. Examples: Closing/Opening of daisies and cloves at night/morning; Sleep movements of the leaves of legumes.
- Chemonasty - response to chemical stimulus. Examples: Closing/Bending of glandular hairs of sundew in response to nitrogenous compounds from an insect to prevent the escape of such insect; Movement of roots towards the more nutrient-rich parts of the soil.
- Hydronasty - response to water. Examples: Movement of roots towards water source, like near the river; Opening/Closing of dandelions in response to humidity (water in the atmosphere).
- Thermonasty - response to temperature. Examples: Opening of tulips when the temperature is increasing and closing when temperature is decreasing, which serves to protect pollens when snow/rain falls; Growth of tomatoes is better when temperature is alternating (night/day) than when temperature is kept constant (all night / all day).
- Geonasty - response to gravity. Examples: Bending of long leaves or barks (when the strength of the plant is not enough to support them against gravity); The upward growth of a plant (against gravity) and generally downward movement of roots (with gravity).
- Thigmonasty - response to contact. Examples: Closing of Mimosa pudica(also known as the touch-me-not plant) in response to touch/contact; Closing of the venus fly trap in response to movement, usually due to landing of insects, to capture the insect.
We’ve answered 330,822 questions. We can answer yours, too.Ask a question