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Erstellt / Aktualisiert 09.11.2016 / 10.11.2016
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5 Exakte Antworten 5 Text Antworten 0 Multiple Choice Antworten
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What is a Plant growth regulator

Chemicals that control a particular development or response
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Where are plant growth regulators produced

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How are plant growth regulators transported

through vascular tissue
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3 reasons why plant growth regulators were difficult to discover

1. active in Small amounts,

2. Effects depend on concentration,

3. Do not act where they are produced

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Plant growth regulator with negative effect on growth

ethene or abscisin
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Uses of artificial growth regulators 

Rooting powder,

weed killer,

ripening of fruit

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how do auxins help phototropism 

they move to shaded part of the stem and cause cell elongation so that the shoot grows towards the light
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IAA experiment results 

low concentration = roots grow;

high concentration = shoots grow;

very high concentration = nothing grows