Allelopathy
/ah-LEL-oh-path-ee/🦋 Ecology●●● Advanced
Also known as: allelopathic inhibition
Allelopathy is an ecological phenomenon where plants release chemicals (allelochemicals) through root exudation, leaf litter decomposition, or volatile emissions that suppress the germination or growth of nearby plants. Classic examples include black walnut (juglone), eucalyptus, and some conifers. Understanding allelopathy is essential for companion planting and forest management.
Etymology
From Greek allelon (of each other) + pathos (suffering)
Example
“The bare ground beneath the black walnut was a clear example of allelopathy — juglone suppressed virtually all understory growth.”