- growing toward or away from the light.
- taking a particular direction under the influence of light.
Origin of phototropic
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for phototropic
For the past decade, he has used the phototropic properties of cyanobacteria to produce images in Petri dishes.The Deadliest Art Ever
May 31, 2010
Phototropic response of the tendril of Passiflora: Experiment 145.
Thus the leaflets of Mimosa pudica acted on by light from above fold upwards, the phototropic effect being positive.
But the same leaflets acted on by light from below exhibit a folding upwards, the phototropic effect being now negative.
This has even led to assumption that there are phototropic particles which function like statoliths in geotropic organs.
As the responsive movement is towards light, the phototropic effect must be regarded as positive.