TROPISMS

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  • TROPISMS directional growth responses
    • PHOTO-TROPISM
      • shoots grow towards the light which enables them to photosynthesise
    • GEO-TROPISM
      • roots grow towards the pull of gravity. this anchors the plant and helps them to take up water which is needed for rigidity
  • CHEMO-TROPISMS
    • THIGMO-TROPISMS
      • shoots of climbing plants, such as ivy, wind around other plants or structures to gain support
    • on a flower, pollen tubes grow down the style, attracted by chemicals, towards the ovaries where fertilisation occurs

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