What are the stages of mode of action of auxins on shoots?

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How do the auxins affect the plant?

Posted Sat 2nd June, 2012 @ 15:42 by ellie

4 Answers

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Auxins are plant growth hormones and are chemical messengers so travel via diffusion. Phototropism is the plants response to light, when light is present plants respond by bending towards the source of light- this is down to auxins. Auxins within the plant move away from the light - and to the back of the plant stem, as it is a growth hormone this causes cell elongation and thus the plant bends from the back causing it to face the light source. 

Hopefully that makes sense to you(: 

Answered Sat 2nd June, 2012 @ 17:03 by Sonia
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Answered Mon 4th June, 2012 @ 09:25 by ellie
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You're welcome :)

Answered Mon 4th June, 2012 @ 09:50 by Georgia
  • -1 votes

Auxins are plant hormones which control growth near the tips of shoots and roots. Auxins are involved in the respones of plants to light, gravity and water.

I hope this helps and is in enough detail if you have any more questions just comment :)

Answered Sat 2nd June, 2012 @ 16:10 by Georgia