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Plant hormones are natural organic substances produced by higher plants that regulate growth and physiological functions at different sites within the plant, even in minute concentrations. These hormones play crucial roles in processes such as cell division, elongation, and response to environmental stimuli. On the other hand, plant growth regulators are synthetic or organic compounds, distinct from natural hormones, that influence plant growth and development. Both are essential in agricultural applications for improving yield, enhancing growth, and managing crop health.
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