In biology, nastic movements are non-directional responses to stimuli (e.g. temperature, humidity, light irradiance), and are usually associated with plants. The movement can be due to changes in turgor (internal pressure within plant cells). Decrease in turgor pressure causes shrinkage, while increase in turgor pressure brings about swelling. Nastic movements differ from tropic movements in that the direction of tropic responses depends on the direction of the stimulus, w… WebAug 30, 2024 · Nastic movement is a non-directional response displayed by plants to external stimuli. External stimuli may include: temperature, light, change in ion concentration or change in turgor pressure. In tropism, the effect is more or less permanent. Most Nastic movements are temporary and reversible.
Nastic movement Definition & Meaning - Merriam-Webster
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Difference Between Tropic and Nastic Movement
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