Tropism in Plants

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    Plants can move and grow in a given direction, depending on different stimuli.

   Moving/ growing away from a stimulus is called negative tropism. For example, roots have negative thigmotropism, so if they meet a rock in the soil, they grow away from it.

   Positive tropism is growing/ moving towards the stimulus, for example, plant shoots growing towards the light. 





You may download a short PowerPoint lesson about tropism in plants from this link


https://drive.google.com/file/d/1HMf3NoGFmX0XeE4BUf9qZ5t70Yjn_MGS/view?usp=sharing

Thigmotropism
Gravitropism
Phototropism

Positive and negative tropisms



Photoperiodism
Long-day, short-day, and day-neutral flowers



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