This page explains tropisms in plants, which are growth movements influenced by external stimuli. There are positive (toward the stimulus) and negative (away from the stimulus) tropisms, with key type...This page explains tropisms in plants, which are growth movements influenced by external stimuli. There are positive (toward the stimulus) and negative (away from the stimulus) tropisms, with key types being phototropism (light) and gravitropism (gravity). Stems grow towards light (positively phototropic) and away from gravity (negatively gravitropic), while roots do the opposite.
