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Responses to Salt Stress

Responses to Salt Stress

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Updated: Aug 25, 2025

Development of Targeting Induced Local Lesions IN Genomes TILLING Populations in Small Grain Crops by Ethyl Methanesulfonate Mutagenesis

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Published on: July 16, 2019

Improved Salinity Tolerance-Associated Variables Observed in EMS Mutagenized Wheat Lines.

Johanna Lethin¹, Caitlin Byrt², Bettina Berger^3,4

¹Department of Biological and Environmental Sciences, University of Gothenburg, SE-405 30 Gothenburg, Sweden.

International Journal of Molecular Sciences

|October 14, 2022

Summary

Researchers compared salinity tolerance in wheat lines, identifying specific lines with improved potassium uptake and reduced sodium accumulation. These findings are crucial for developing salt-tolerant crops.

Keywords:

EMS Smarthouse mutagenized salinity salt stress sustainable agriculture wheat

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Last Updated: Aug 25, 2025

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Published on: April 13, 2012

Area of Science:

Plant Science
Agronomy
Genetics

Background:

Salinity stress significantly impacts global crop yields, necessitating the development of salt-tolerant crop varieties.
Wheat (Triticum aestivum) is a vital staple crop susceptible to salinity, driving research into tolerance mechanisms.
Understanding phenotypic variation in response to salinity is key for breeding improved wheat cultivars.

Purpose of the Study:

To compare salinity tolerance-associated phenotypes in EMS-mutagenized wheat lines.
To identify wheat lines exhibiting enhanced physiological traits under saline conditions.
To evaluate the relationship between ion content, water use, and yield under salinity.

Main Methods:

EMS mutagenized wheat lines were subjected to five NaCl concentrations (0-160 mM).
Image-based phenotyping was used for non-destructive measurement of vegetative growth.
Leaf ion content (Na+, K+, Cl-), water-use index (WUI), and thousand kernel weight (TKW) were quantified.

Main Results:

Significant variation in leaf Na+, K+, and Cl- content (9.3, 1.4, and 2.4-fold, respectively) was observed among selected lines.
Lines OA6 and OA62 showed higher K+ accumulation, while OA6, OA10, and OA62 exhibited reduced Na+:K+ ratios (50-75%).
OA62 demonstrated a ~30% greater WUI, and lines OA25 and OA52 maintained or increased TKW under high salinity.

Conclusions:

Phenotypic analysis revealed diverse strategies for salinity tolerance in wheat lines.
Specific lines (e.g., OA6, OA62) possess desirable traits like enhanced ion homeostasis and water use efficiency.
Further genetic studies and breeding efforts are needed to combine these traits for optimal salinity tolerance in wheat.