Heliotropism came from the Greek words “helios” which means “concerning the sun” and “tropos” which means “a turn” or “style”. It is the characteristic of some plants and animals to either turn towards or turn away from sunlight or artificial sources of light. In botany, diaheliotropic plants move their leaves to maximize light to enhance photosynthesis (hyperlink). On the other hand, paraheliotropic plants are those that move their leaves to avoid light exposure to reduce dehydration specially during drought.

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