Phototropism
Videos
In biology, phototropism, formerly called heliotropism, is the growth of an organism in response to a light stimulus. Phototropism is most often observed in plants, but can also occur in other organis
The Thale Cress (Arabidopsis thaliana) is regulated by blue to UV light
Phycomyces, a fungus, also exhibit phototropism
Example on a Phalaenopsis
Ravenalas growing between two buildings in Kinshasa, Democratic Republic of Congo. The plane (here perpendicular to the north–south axis) of these two plants is orientated to maximize daylight absorption
Plant perception is the ability of plants to sense and respond to the environment by adjusting their morphology and physiology. Botanical research has revealed that plants are capable of reacting to a
The leaf closing after touch in Mimosa pudica depends on electrical signals.
The sunflower, a common heliotropic plant which perceives and reacts to sunlight by slow turning movement
Vine (Vitis) tendril. Note how the plant reaches for and wraps around the galvanised wire provided for the purpose. This is a very tough twig and appears to have no other purpose than support for the plant. Nothing else grows from it. It must reach out softly, then wrap around and then dry and toughen. See more at thigmotropism.
Mimosa pudica open