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Delayed senescence and crop performance under stress: always a functional couple?
Mariana Antonietta1, Dana Martinez1, Juan J Guiamet1
1Instituto de Fisiología Vegetal, CONICET-UNLP, Argentina.
Journal of Experimental Botany
|April 18, 2024
Summary
Delayed leaf senescence, or the "stay-green" trait, can enhance crop stress resistance, particularly against water deficit. This review explores how delaying senescence may improve crop performance and grain yield under various environmental stresses.
Area of Science:
- Plant Physiology
- Crop Science
- Stress Biology
Background:
- Abiotic stresses accelerate leaf senescence in crops, reducing photosynthesis and yield.
- The 'stay-green' trait, characterized by delayed leaf senescence, is linked to enhanced stress resistance.
- This trait is particularly noted for improving performance under water deficit conditions.
Purpose of the Study:
- To review evidence linking delayed leaf senescence to abiotic stress resistance in crops.
- To investigate the physiological mechanisms underlying the stay-green trait's benefits.
- To identify agronomic conditions where stay-green genotypes improve yield under stress.
Main Methods:
- Literature review of studies on stay-green genotypes and stress resistance.
- Analysis of physiological mechanisms related to delayed senescence.
- Evaluation of agronomic data concerning yield performance under stress.
Main Results:
- Genotypes with delayed senescence often exhibit increased resistance to abiotic stress, especially water deficit.
- The stay-green trait can mitigate yield losses under stressful environmental conditions.
- Specific physiological and agronomic factors influence the effectiveness of the stay-green trait.
Conclusions:
- Delayed leaf senescence is a promising trait for improving crop resilience to abiotic stresses.
- Understanding the physiological and agronomic context is crucial for leveraging the stay-green trait.
- Further research can optimize the application of stay-green traits for enhanced crop productivity.
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