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Plant
Plant Processes and Reproduction
| Term | Definition |
|---|---|
| stimuli | are any changes in an organism's environment that cause a response. |
| tropism | plant growth toward or a away from an external stimulus. |
| light | leaves and stems tend to grow in the direction of light, root generally grow away from the light. |
| touch | the structures called tendrils, help to hold the plants |
| gravity | stem grows away from the gravity, but the root grow toward the gravity. |
| Auxins | they grow toward light. |
| Ethylene | helps stimulate the ripening of fruit. |
| Gibberellins | increase the rate of the cell division and cell elongation. |
| Cytokenins | increase the rate of cell division and slow the aging process of flowers and fruits. |
| photoperidism | a plant's response to the number of hours of darkness in its environment. |
| Plant hormones | a substance that acts as a chemical messenger within a plant. |
| Long-day Plants | Plants that flower when exposed to less than 10-12 hours of darkness. |
| Short-day plants | plants that require 12 or more hours of darkness for flowering to begin. |
| Day-Neutral Plants | the flowering of some plant doesn't seem to be affected by the number of hours of darkness. |
| response | any behavior of a living organism that results from an external or internal stimulus. |
Created by:
muangthonglink
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