ArticleBMC plant biology2025
Melatonin stabilizes photosynthesis and scavenges ROS to enhance salt tolerance in cucumber.
Article in BMC plant biology, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.
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Who cites it
2 citing papers in PubMed.
- T-Consciousness fields alter germination, growth, and biochemical responses of wheat (Plant signaling & behavior · 2026Article
- Comprehensive Genome-Wide Identification and Expression Analysis of the N6-Methyladenosine (m6A) Regulatory Network Influences Rapid Stress Adaptation With Exogenous Melatonin in Rice.Journal of pineal research · 2026Article
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Authors and funding
6 authors.
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Abstract
backgroundSoil salinization severely constrains crop productivity worldwide. In cucumber (Cucumis sativus L.), salt stress induces oxidative damage and impairs photosynthesis. Melatonin (MT) improves abiotic stress tolerance across diverse crops; yet its salt tolerance mechanism in cucumber remains unclear.
resultsUnder 100 mM NaCl, foliar application of 100 µM MT increased plant height, leaf area, and biomass. Physiologically, MT enhanced antioxidant enzyme activities, increased ascorbate (ASA) and osmolyte levels, and lowered the Na⁺/K⁺ ratio. MT also elevated chlorophyll content (SPAD), indicating protection of the photosynthetic apparatus. Transcriptomics identified 1,355 melatonin-responsive DEGs, with GO/KEGG enrichment in photosynthesis, photosynthesisantenna proteins, and porphyrin-chlorophyll metabolism. WGCNA revealed a brown module strongly associated with MT and enriched in light-harvesting complex (LHC) genes; LHC genes of PSI and PSII were upregulated by MT. Consistently, MT improved photosynthetic rate and reduced H₂O₂ and O₂·⁻ accumulation.
conclusionMelatonin enhances cucumber salt tolerance by stabilizing photosynthesis-via LHC gene regulation-and mitigating ROS stress, providing a mechanistic basis for improving stress resilience in horticultural crops.
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