ArticleFrontiers in plant science2026
The interaction of gibberellin and melatonin promotes tobacco leaf growth and balances chemical components content in upper leaves.
Article in Frontiers in plant science, 2026. 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.
- Hormone-metabolism crosstalk in plants: an integrated signaling network coordinating growth and stress adaptation.Plant signaling & behavior · 2026Review
- From Abiotic Stress to Emerging Environmental Pollutants: Expanding Roles of Melatonin and NO in Plant Defense.International journal of molecular sciences · 2026Review
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Authors and funding
12 authors.
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Abstract
Introduction: Tobacco ( Methods: A two-factor randomized block design experiment was conducted to evaluate GA and MT effects on tobacco upper leaves. Morphological parameters, biomass accumulation, and chemical composition were measured. Structural equation modeling and TOPSIS (Technique for Order Preference by Similarity to Ideal Solution) analysis were employed to determine regulatory pathways and optimal hormone combinations. Results: Gibberellin significantly promoted upper leaf morphological development. The 75 mg/L GA treatment increased leaf width and leaf area by 12.96% and 17.69%, respectively, and significantly enhanced both fresh and dry weight (P<0.01). The GA-MT interaction significantly increased biomass accumulation (P<0.05). Structural equation modeling indicated GA primarily drove dry matter accumulation through direct regulation of leaf area (path coefficient, 0.47) and fresh weight (path coefficient, 0.39). Single hormone treatments improved chemical quality, with Chemical Component Usability Index (CCUI) ameliorated under 80 μmol/L MT and 75 mg/L GA treatments. TOPSIS analysis identified 75 mg/L GA + 80 μmol/L MT as the optimal combination (closeness coefficient, 0.644), effectively balancing biomass increase with optimized chemical coordination. Discussion: This study confirms gibberellin as the dominant factor regulating upper leaf morphology and biomass, while melatonin modulates chemical quality through interaction, providing a theoretical foundation and technical strategy for enhancing growth and chemical quality in tobacco upper leaves.
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