heliotropism


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heliotropism

[‚hē·lē′ä·trə‚piz·əm]
(biology)
Growth or orientation movement of a sessile organism or part, such as a plant, in response to the stimulus of sunlight.
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The reversible bending response of a plant to a light stimulus is called heliotropism and can be further classified as paraheliotropism (light-avoiding) and diaheliotropism (light-seeking) [4, 5].
He designated America as the "last and brightest empire of time" and accepted the translatio and heliotropism as facts of history rather than as the dogmas of faith that they were.
Consequences of flower heliotropism for reproduction in an alpine buttercup (Ranunculus adoneus).
The camera, seemingly governed by heliotropism, pans upward from the massive trunk of a buttress tree to glimpse how sunlight filters through the forest canopy.
The finding of heliotropism in modern stromatolites not only sheds light on the behavior of living microorganisms but also helps to confirm an earlier geologic theory linking the tiny architectures of ancient stromatolites to the much larger dynamics of the ancient solar system.
Habitat Manila introduces its Spring-Summer 2016 collection, Heliotropism.
It is something we share with the birds that turn from their breeding grounds at the slightest shift of temperature or wind, the heliotropism of plants and animals toward or away from the sun.