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Related to phototropic: geotropic, phototrophic


 (fō-tŏt′rə-pĭz′əm, fō′tō-trō′-)
Growth or movement of a sessile organism toward or away from a source of light.

pho′to·tro′pic (fō′tə-trō′pĭk) adj.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(ˌfoʊ təˈtrɒp ɪk, -ˈtroʊ pɪk)

growing toward or away from the light.
pho`to•trop′i•cal•ly, adv.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
References in periodicals archive ?
Oyster larva has a negative phototropic behavior and during the pediveliger phase they are sensitive to light, preferring protected substrates in shadows for settlement (CASTILHO-WESTPHAL et al., 2015).
After 24 h, the phototropic brine shrimps (nauplii), which went to the illuminated compartment, were collected by pipette and incubated under illumination for 24 h at room temperature (Meyer et al., 1982).
Most plants are phototropic. Many nodes exist on the trunk and a new branch always grows from a node that is located toward the sun.
Phototropic growth is the growth all plants make towards light - if you put a plant on a windowsill you'll see all the foliage twist towards the light.
Scientists used a phototropic bacterium - bacteria that respond to light stimuli -  known as Rhodopseudomonas palustris as a catalyst to generate methane from the greenhouse gas.
Vicky Dean AMOST plants are phototropic, meaning they grow towards the light and leaves try to face the sun.
the Avena coleoptile: evidence of stomatal control of the phototropic
Cryptochromes may also be involved in phototropic growth of axial corallites in acroporid branching corals (Kaniewska et al., 2009).
The poem is called "Skototropic," (6) a word derived from the twin Greek roots of trope, which means "turning," and skotos, which means "darkness" or "gloom." It is in other words the direct opposite of phototropic, and some plants have even been known to exhibit skototropic behavior as part of their survival strategy.
After approximately 48 h, the phototropic nauplii moved through a hole in the division to the portion of the chamber kept under continuous light.