Vines growing up a wall is an example of thigmotropism.
What is thigmotropism?
- Thigmotropism is the movement or change in orientation of a plant’s growth as a reaction to touch.
- The orienting factor is generally a hard surface that can change the direction of the plant’s growth or the growth of one of its organs.
- Thigmotropism can be in the form of opening or closing of parts of the plant such as the petals or leaves, the coiling of the plant around the surface, as well as other ways.
Why other options are incorrect?
- Phototropism is incorrect as it relates to light.
- Gravitropism is incorrect as it relates to gravity.
- Hydrotropism is incorrect as it relates to water.
Hence, vines shows movement it is an example of thigmotropism.
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