Ethylene is a gas emitted by ripening fruits and stressed plants. There are also artificial sources: at the turn of the century street lights were lit with coal gas that released ethylene and inhibited growth of street trees.
Ethylene can have the following effects:
- Stimulates the release of dormancy
- Stimulates shoot and root growth and differentiation (triple response)
- Stimulates leaf and fruit abscission.
- Stimulates flower opening.
- Stimulates flower and leaf senescence.
- Stimulates fruit ripening
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