Ruddat, Manfred Department of Ecology and Evolution, University of Chicago, Chicago, Illinois.
Last reviewed:March 2020
Show previous versions
- Allelopathy in the rhizosphere and soil community
- Allelopathy and ecological succession
- Allelopathy of invasive species
- Manipulation of allelopathy for societal benefits
- Allelopathy in weed and pest control in agricultural ecosystems
- Application of allelochemicals as herbicides and pesticides
- Allelopathy in forest ecosystems
- Allelopathy, herbivores, and pathogens
- Related Primary Literature
- Additional Reading
A natural process in which harmful or beneficial effects are caused by secondary metabolites that spread from a donor organism to a recipient and are produced by plants, algae, bacteria, and fungi. Allelopathy is a key ecological process and has been studied predominantly in plants (Fig. 1). The chemical compounds involved in allelopathy are referred to as allelochemicals and comprise almost all classes of organic chemical substances. Hans Molisch (1937) coined the term allelopathy from the Greek words allelon for mutual and pathos for harm or affection, based on his observation of the premature ripening of apples and pears that were stored together with fruits from early ripening varieties. Depending on the purpose, the early ripening effect could be regarded as beneficial or harmful. Historically, detrimental effects have made botanists aware of allelopathy. One of the first accounts of an allelopathic effect that is commonly observed, namely the zone of growth inhibition around walnut trees (Juglans species), was reported by Pliny (23–79 CE). Even earlier, Theophrastus (372–287 BCE) described allelopathic effects of weeds on crop plants, including the inhibition of growth of alfalfa (Medicago sativa) by pigweed (Amaranthus retroflexus). See also: Agricultural science (plant); Agricultural soil and crop practices; Agriculture; Botany; Chemical ecology; Plant growth
The content above is only an excerpt.
for your institution. Subscribe
To learn more about subscribing to AccessScience, or to request a no-risk trial of this award-winning scientific reference for your institution, fill in your information and a member of our Sales Team will contact you as soon as possible.
to your librarian. Recommend
Let your librarian know about the award-winning gateway to the most trustworthy and accurate scientific information.
AccessScience provides the most accurate and trustworthy scientific information available.
Recognized as an award-winning gateway to scientific knowledge, AccessScience is an amazing online resource that contains high-quality reference material written specifically for students. Contributors include more than 10,000 highly qualified scientists and 46 Nobel Prize winners.
MORE THAN 8700 articles covering all major scientific disciplines and encompassing the McGraw-Hill Encyclopedia of Science & Technology and McGraw-Hill Yearbook of Science & Technology
115,000-PLUS definitions from the McGraw-Hill Dictionary of Scientific and Technical Terms
3000 biographies of notable scientific figures
MORE THAN 19,000 downloadable images and animations illustrating key topics
ENGAGING VIDEOS highlighting the life and work of award-winning scientists
SUGGESTIONS FOR FURTHER STUDY and additional readings to guide students to deeper understanding and research
LINKS TO CITABLE LITERATURE help students expand their knowledge using primary sources of information