abiotic stress tolerance
phrasePronunciation: /eɪbaɪˈɒtɪk strɛs ˈtɒlərəns/
Also written as: AST
The capacity of plants to withstand and maintain functionality under non-living environmental stressors. A multifaceted trait involving physiological, biochemical, and molecular adaptations.
Full Definition
Abiotic stress tolerance encompasses the complex suite of mechanisms that enable plants to survive, grow, and reproduce under adverse non-biological environmental conditions such as drought, salinity, temperature extremes, and heavy metals. This trait involves multiple levels of biological organization from molecular stress sensors to whole-plant architectural adaptations. Tolerance mechanisms include stress avoidance, stress tolerance at the cellular level, and stress recovery capabilities. Research in this field aims to understand the genetic basis of tolerance, identify biomarkers for breeding programs, and develop strategies for enhancing crop resilience to climate change.
Plain English
How well plants can survive and grow when faced with harsh environmental conditions like drought, salty soil, extreme temperatures, or toxic metals in the soil.
In Editorial Context
A central concept in stress research publications that requires careful operational definition, standardized measurement protocols, and consideration of temporal dynamics, often involving comparative studies across genotypes, treatments, and environmental conditions.
Etymology & History
Emerged as plant ecology and physiology research distinguished between biological and physical environmental stressors, formalized with advancing molecular biology techniques
Initially focused on single stress factors, evolved to consider multiple stress interactions and molecular mechanisms
Usage
"The manuscript's evaluation of abiotic stress tolerance across twelve wheat cultivars requires standardization of stress intensity measurements and clearer statistical analysis of tolerance indices."
Usage note: Should specify which abiotic stress(es) and measurement criteria; tolerance is relative and context-dependent
Context: Research papers, breeding programs, agricultural development, climate adaptation strategies
Region: international
Also known as
Contrasted with
Don't confuse with
Sometimes confused with stress avoidance or general plant fitness, but specifically refers to withstanding stress exposure