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Alkaline tolerance in plants: The AT1 gene and beyond
Yuting Qi1, Yujie Xie1, Mingrui Ge1
1MOE Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou, Gansu, 730000, China.
Journal of Plant Physiology
|October 25, 2024
Summary
Scientists identified Alkaline tolerance 1 (AT1), a gene crucial for plant alkaline sensitivity. Editing AT1 enhances crop yields in alkaline soils, offering a path to developing alkaline-resistant crops for improved food security.
Area of Science:
- Plant Biology
- Genetics
- Agricultural Science
Background:
- Soil salinization and alkalization pose significant threats to global crop production and food security.
- Combined saline-alkaline stress, prevalent in alkaline soils (high pH, NaHCO3, Na2CO3), is more detrimental to crops than neutral salt stress.
Purpose of the Study:
- To identify genes contributing to alkaline sensitivity in crops.
- To explore the potential of gene editing for developing alkaline-resistant crops.
Main Methods:
- Genome-wide association analysis in sorghum to identify genes linked to alkaline tolerance.
- Phylogenetic analysis and motif comparison of G protein gamma-subunits (Gγ) across plant species.
Main Results:
- The gene Alkaline tolerance 1 (AT1), encoding a G protein gamma-subunit (Gγ), was identified as a key factor in alkaline sensitivity.
- Editing the AT1 gene significantly enhanced the yields of sorghum, rice, maize, and millet in alkaline soil conditions.
Conclusions:
- AT1 is the first gene specifically linked to alkaline tolerance in plants.
- Targeted editing of AT1 presents a promising strategy for developing crops with enhanced resilience to alkaline soils, thereby improving agricultural sustainability.
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