TROPISM IN PLANTS€¦ · Do you know what is Hydrotropism , Thigmotropism or Chemotropism ? Ans:...
Transcript of TROPISM IN PLANTS€¦ · Do you know what is Hydrotropism , Thigmotropism or Chemotropism ? Ans:...
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SEnvironmental triggers, such as light or gravity, will change the directions
that plant parts grow in. These directional, or tropic, movements can be either towards the stimulus, or away from it.
Phototropism
Geotropism
Picture Sources: https://upload.wikimedia.org/wikipedia/commons/8/8e/Phototropism.jpg
https://en.wikipedia.org/wiki/Aerial_root#/media/File:Banyan_tree_Old_Lee_County_Courthouse.jpg
Growth/bending towards the light is called PhototropismStem ususally shows positive Phototropism (and negative geotropism).The reverse is true for roots
Growth of roots towards earth is called GeotropismDo you know what is Hydrotropism , Thigmotropism or Chemotropism ?Ans: movement / growth affected by water, touch and chemicals respectively