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Integrative comparative proteomics identifies core differentially expressed proteins and pathways for drought
Qiong Kuang1, Shiyan Huang1,2, Shiquan Bian3
1College of Biological and Food Engineering, Chongqing Three Gorges University, Wanzhou, China.
Frontiers in Plant Science
|March 23, 2026
Summary
Drought-tolerant rice varieties show enhanced physiological resilience and gene expression. These cultivars maintain better growth and biomass by activating antioxidant defenses and coordinating protein networks for signal transduction.
Area of Science:
- Plant science
- Agricultural science
- Molecular biology
Background:
- Drought stress severely impacts global rice production.
- Understanding rice drought adaptation mechanisms is crucial for food security.
Purpose of the Study:
- To investigate the physiological, transcriptomic, and proteomic basis of drought tolerance in rice.
- To identify molecular targets for improving rice drought resistance.
Main Methods:
- Comparative analysis of four rice cultivars under drought stress.
- Physiological measurements, gene expression profiling, and proteomic analysis.
- Functional enrichment and protein-protein interaction network analysis.
Main Results:
- Tolerant rice cultivars exhibited reduced growth damage, higher antioxidant enzyme activity (catalase, peroxidase, superoxide dismutase), and lower malondialdehyde levels.
- Upregulation of drought-responsive genes (e.g., OsDSM1, OsCPK9, OsSNAC1) and activated carbohydrate metabolism, redox homeostasis, and protein transport were observed in tolerant varieties.
- Proteomic analysis revealed a more coordinated protein interaction network with key hub proteins involved in signal transduction in tolerant lines.
Conclusions:
- Rice drought tolerance involves complex regulatory networks at physiological, transcriptional, and proteomic levels.
- Activated antioxidant systems, specific gene expression patterns, and robust protein interaction networks contribute to drought resilience.
- Identified molecular targets and pathways offer potential for breeding drought-tolerant rice varieties.
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