Tropism: Yellow Frangipanis

Tropism can be described as a directed growth response that influence plant parts to grow toward or away from a certain stimulus. There are three main forms of tropism: gravitropism (which is a plant’s growth as a response to gravity), thigmotropism (which is a plant’s growth in response to touch) and phototropism ( a plant’s growth in response to light). The Yellow Frangipanis, as shown above, is exhibiting an example of phototropism. Due to its placement in the shade, the frangipanis has experienced directional growth responses that has caused an elongation and curvature of the frangipanis’ stem. This elongation allows for the frangipanis to be exposed to sunlight and perform photosynthesis.

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