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 (ə-lē-lŏp′ə-thē, ăl′ə-)
A usually negative effect on the growth or development of an organism of one species, caused by a chemical released by an organism of another species. Usually used of plants.

[Greek allēlōn, reciprocally (from allos, another; see al- in Indo-European roots) + -pathy.]

al·le′lo·path′ic (ə-lē′lə-păth′ĭk, ə-lĕl′ə-) 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.


(Botany) the inhibitory effect of one living plant upon another by the release of toxic substances
[from French allélopathie, from Greek allēl- one another + pathos suffering]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ə liˈlɒp ə θi, ˌæl əˈlɒp-)

suppression of growth of a plant by a toxin released from a nearby plant.
[1940–45; < French allélopathie; see allele, -pathy]
al•le•lo•path•ic (əˌli ləˈpæθ ɪk, əˌlɛl ə-) adj.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
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References in periodicals archive ?
Allelopathy involves the production of secondary metabolites from plants, which affects the growth of neighboring plants and microorganisms either by inhibiting or by promoting their growth.
Effects of eucalyptus allelopathy on growth characters and antioxidant enzymes activity in phalaris weed.
This reduction in corn density may have been due to the greater early season density of yellow mustard compared with the other smother plant species or the allelopathy often associated with Brassica species (Al-Khatib et al.
scientists to explore allelopathic phenomena, calls the new work "excellent," noting that many biologists have argued about the theory of plant allelopathy but few have actually designed ways of documenting it.
The alternative hypothesis that chemical allelopathy (e.g., the unique compound avrainvilleol) might be responsible for inhibition of epiphytic growth (cf.
The use of specific crop and cover crop rotations may also be used to control pests through allelopathy an interference interaction in which a plant releases into the environment a compound that inhibits or stimulates the growth or development of other organisms.
Kato-Noguchi, "Plant growth inhibitory activity of medicinal plant Hyptis suaveolens: could allelopathy be a cause?" Emirates Journal of Food and Agriculture, vol.
Previous research suggested that pale swallowworts might be putting phytotoxins into the soil to discourage the growth of competing plants nearby--a process known as "allelopathy." But the specific compounds responsible for pale swallowwort's toxic effects had not been identified.
Beyond direct competitive interactions, goldenrods have the potential to interact indirectly with their neighbors through allelopathy. Allelopathy has generally come to mean the deleterious effect that one plant has on another through the production of chemical retardants (Martin and Rademacher, 1960; Muller, 1965; Jackson and Willemsen, 1976).