GCSE Biology (AQA)

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Uses of Auxins

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Homeostasis and Response Plant Hormones

Uses of Auxins

2:20 Use of Plant Hormones
Spec 4.5.4.2
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  • Auxins have multiple applications in gardening and agriculture.
  • They are used as rooting powders, for promoting growth in tissue cultures, and as weed killers.
  • Rooting powders help plant cuttings develop roots quickly and grow into new plants.
  • In tissue culture, auxins stimulate cell division and elongation, aiding in the growth of new plants from small sections of a parent plant.
  • As weed killers, auxins act selectively, killing weeds without harming desirable crops by causing the weeds to grow excessively fast, leading to their death.
  • Weed killers can reduce biodiversity by eliminating plants that serve as food sources for other species, thus they should be used with caution.

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