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What is meant by directional and nondirectional stimuli?

Question #91848. Asked by 14391.

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markswood
Answer has 4 votes
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markswood
17 year member
578 replies avatar

Answer has 4 votes.

Currently voted the best answer.
Directional stimuli are what cause tropism or taxis in plants, in response to things like light, gravity, temperature etc.
Ref: link https://en.wikipedia.org/wiki/Tropism
link https://en.wikipedia.org/wiki/Taxis

Non-directional stimuli are what cause reversible responses in plants to light, temperature, humidity, also known as nastic movements.
Ref:link https://en.wikipedia.org/wiki/Nastic_movements

Feb 02 2008, 4:01 AM
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