Definition of phototropism in English:
noun[mass noun] Biology
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). Compare with heliotropism, phototaxis.
- The nucleus-localized, flavin-binding gene products, CRY1 and CRY2 are involved in several blue light responses, including phototropism.
- Like other interactions between organisms and their environments, plant phototropism can be thought of as a process involving three phases: perception, transduction and response.
- One of the earliest noted auxin effects was in phototropism, the curvature of stems toward a light source.
- Example sentences
- At the end of the blue light treatment, wild-type hypocotyls showed curvatures of about 60°C and red-fluorescing chloroplasts in the phototropic arch (not shown).
- Blue-light reception in plants leads to phototropic plant movement, chloroplast relocation, and opening of stomatal guard cells.
- Phototropins and homologs, recently renamed Phot proteins, comprise a class of blue-light receptors that are involved in phototropic plant movement, chloroplast relocation, and stomatal opening in guard cells.
Definition of phototropism in:
- US English dictionary
What do you find interesting about this word or phrase?
Comments that don't adhere to our Community Guidelines may be moderated or removed.
Most popular in the UK
Most popular in Canada
Most popular in Australia
Most popular in Malaysia
Most popular in Pakistan