Gespeichert in:
| Hauptverfasser: | , , , , , |
|---|---|
| Format: | Artículo Open Access |
| Veröffentlicht: |
Wiley
2026
|
| Schlagworte: | |
| Online-Zugang: | https://scijournals.onlinelibrary.wiley.com/doi/10.1002/jsfa.70565 |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
Inhaltsangabe:
- Exogenous melatonin and silicon modulate chlorophyll metabolism and photosynthetic performance in muskmelon ( Cucumis melo L.) under heat stress Alka Shankar Mohd Aamir Sajad Ali Mohammed A Almalki Mohammad Alfredan Waquar Akhter Ansari Journal of the Science of Food and Agriculture Abstract BACKGROUND Heat stress is one of the most important environmental constraints in sustainable agriculture that significantly affect seed germination, plant growth, and development. Rapid climatic change events in recent times have increased heat stress in plants thereby affecting global agricultural production. Hence, new technologies and approaches are required to enhance heat resilience in crops. The application and positive influence of both melatonin (MT) and silicon (Si) in alleviating heat stress are well known, their combined application effects on photosynthetic damage are unexplored. This is the first study to investigate the synergistic effect of MT and Si on chlorophyll metabolism and photosynthesis in muskmelon under heat stress. The present work explored the synergistic effects of exogenous MT (0.1 and 0.2 mol m −3 ) and Si (25 and 50 mol m −3 ) over photosynthetic performance in muskmelon ( Cucumis melo L.) plants under heat stress (35 °C and 40 °C). RESULTS Our results demonstrated that MT + Si combined application had a better response over single treatment. At a temperature of 40 °C, the MT + Si combined treatment improved the photosynthetic rate by 119.4%, increased stomatal conductance by 48.5%, and also enhanced photosynthetic efficiency ( F v / F m ) by 33.3%. Interestingly, total chlorophyll content was increased by 21.6%, while there was a significant reduction in stress‐induced oxidative markers, such as H₂O₂, which was decreased by 69.6%, malondialdehyde by 64.1%, and proline by 80.4%. In contrast, antioxidant enzyme activities and gene expression levels were significantly downregulated under combined treatment, indicating effective reactive oxygen species scavenging and restored cellular homeostasis rather than stress‐induced upregulation. CONCLUSION This work signifies the role of MT and Si as potential sustainable alternatives for providing thermotolerance to heat‐sensitive vegetable crops, including muskmelon. © 2026 Society of Chemical Industry. 10.1002/jsfa.70565 http://onlinelibrary.wiley.com/termsAndConditions#vor