A plant's directional growth response to chemical gradients or stimuli in the environment. This includes growth toward beneficial chemicals like nutrients or away from harmful substances like toxins.
From Greek 'chemo' meaning 'chemical' and 'tropos' meaning 'turn.' The concept emerged in the early 20th century as researchers discovered that plants could respond to chemical signals in their environment through directed growth.
Chemotropism is like a plant's chemical GPS system! Roots can actually 'smell' their way to nutrient-rich patches of soil or grow away from areas contaminated with harmful chemicals, making plants remarkably sophisticated environmental detectives.
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