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Updated: Jan 7, 2026
11:01
Monitoring Plant Hormones During Stress Responses
Published on: June 15, 2009
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Hormesis as a Particular Type of Plant Stress Response
Agnieszka Siemieniuk1, Małgorzata Rudnicka1, Gabriela Jemioła1
1Plant Ecophysiology Team, Institute of Biology, Biotechnology and Environmental Protection, Faculty of Natural Sciences, University of Silesia in Katowice, 40-007 Katowice, Poland.
Plants (Basel, Switzerland)
|December 31, 2025
Summary
Hormesis in plants, a low-dose toxic substance response, involves temporary physiological adjustments and stimulated growth. Plant growth, not single traits, defines hormesis, distinguishing it from acclimation to beneficial factors.
Area of Science:
- Plant Physiology
- Environmental Stress Biology
- Toxicology
Background:
- Plants face continuous abiotic and biotic stresses affecting growth and fitness.
- Hormesis is a stress response to toxic substances, but its precise definition and relation to other stress phenomena require clarification.
Purpose of the Study:
- To clarify the concept of hormesis in plants as a distinct low-dose stress response.
- To differentiate hormesis from other plant stress response phenomena like acclimation.
Main Methods:
- Literature review of published studies on plant responses to toxic substances.
- Analysis of physiological and growth parameters associated with stress responses.
Main Results:
- Hormesis is characterized by temporary, non-heritable physiological adjustments to mild toxic stress.
- Low doses of toxic substances (e.g., cadmium, lead) can stimulate plant growth via defense mechanisms and increased auxin.
- Plant growth (shoot biomass/elongation) is proposed as the key indicator for identifying hormetic responses.
Conclusions:
- Hormesis is a specific type of acclimation involving temporary adjustments to mild toxic stress.
- Distinguishing hormesis from acclimation to physiological factors (light, nutrients) is crucial.
- Defining hormesis by plant growth provides a clearer framework for future research.
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