hardening
nounPronunciation: /ˈhɑːrdənɪŋ/
The process of exposing plants to mild stress conditions to increase their tolerance to subsequent severe stress exposure.
Full Definition
Hardening is a controlled stress conditioning process where plants are exposed to gradually increasing levels of abiotic stress or mild stress conditions to enhance their tolerance to more severe stress episodes. This practice is commonly used in cold hardening, where plants are exposed to progressively lower temperatures to increase freezing tolerance, and drought hardening, where water availability is gradually reduced. The hardening process involves the activation of stress response pathways, accumulation of protective compounds, and structural modifications that prepare plants for harsh conditions. In agricultural and horticultural practices, hardening is used to improve crop resilience and survival rates when transplanting or during adverse weather conditions.
Plain English
A way of gradually toughening up plants by exposing them to mild stress so they can better survive harsh conditions later, like training them to be stronger.
In Editorial Context
A treatment methodology commonly described in experimental sections that requires clear protocol details and distinction from natural acclimatization processes in research manuscripts.
Etymology & History
Originally used in metallurgy and later adopted in horticulture and plant physiology to describe stress conditioning processes.
Expanded from simple cold conditioning to include various forms of abiotic stress preconditioning with molecular understanding.
Usage
"The experimental design section needs clarification on the hardening protocol duration and whether the observed stress tolerance resulted from hardening treatments or genetic differences."
Usage note: Should specify the type of hardening (cold, drought, etc.) and distinguish from natural seasonal acclimatization.
Context: Plant physiology experiments, agricultural practices, stress tolerance research, horticultural applications
Region: international
Also known as
Contrasted with
Don't confuse with
Sometimes confused with acclimatization, but hardening specifically refers to controlled preconditioning treatments rather than natural environmental responses.