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[mass noun] The orientation of a plant or other organism in response to light, either towards the source of light (positive phototropism) or away from it (negative phototropism).
- ‘Phototropins mediate photomovement responses such as phototropism, chloroplast relocation and stomatal opening.’
- ‘The nucleus-localized, flavin-binding gene products, CRY1 and CRY2 are involved in several blue light responses, including phototropism.’
- ‘One of the earliest noted auxin effects was in phototropism, the curvature of stems toward a light source.’
- ‘The latter is known as a photoreceptor, for example, for phototropism, stomatal aperture and entrainment of endogenous rhythms in plants and animals.’
- ‘Like other interactions between organisms and their environments, plant phototropism can be thought of as a process involving three phases: perception, transduction and response.’
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