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Deciphering the Sodium Sensing Mechanisms in Glycophytes and Halophytes
Rabia Areej Cheema1, Hafiz Mamoon Rehman1,2, Sehar Nawaz1
1Centre of Agricultural Biochemistry and Biotechnology, University of Agriculture Faisalabad, Faisalabad, Pakistan.
Plant, Cell & Environment
|September 2, 2025
Summary
Plants sense salt using sodium ions (Na+). This review explores potential Na+ sensors like GIPC phospholipids, ion channels (CNGCs, GLRs), and receptor-like kinases (RLKs) in salt-tolerant and salt-sensitive plants.
Area of Science:
- Plant Physiology
- Molecular Biology
- Biochemistry
Background:
- Plants adapt to saline environments via molecular and morphological mechanisms.
- Salinity sensing and stress tolerance mechanisms are well-studied in glycophytes but less so in halophytes.
- Sodium ions (Na+) are key contributors to soil salinity, yet their perception mechanism remains unclear.
Purpose of the Study:
- To review and identify potential Na+ sensor candidates in both glycophytes and halophytes.
- To propose novel models for Na+ sensing mechanisms in plants.
- To highlight research avenues for enhancing crop salt tolerance.
Main Methods:
- Literature review of Na+ sensor candidates.
- Survey of glycosyl inositol phosphoryl ceramides (GIPCs), Non-selective cation channels (NSCCs) like cyclic nucleotide-gated channels (CNGCs) and glutamate receptors (GLRs), and receptor-like kinases (RLKs).
- Comparative analysis of Na+ sensing mechanisms between glycophytes and halophytes.
Main Results:
- Glycosyl inositol phosphoryl ceramides (GIPCs) show direct evidence as Na+ sensors.
- Various Non-selective cation channels (NSCCs), including CNGCs and GLRs, and receptor-like kinases (RLKs) are implicated in Na+ perception.
- The review proposes new models for Na+ sensing in both plant types based on identified receptors.
Conclusions:
- Understanding Na+ perception is crucial for plant salinity tolerance.
- GIPCs, NSCCs, and RLKs represent key molecular players in Na+ sensing.
- Comparative studies between glycophytes and halophytes can guide strategies for improving salt tolerance in crops.
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