Raw data: Elevated UV-B alters anti-herbivore plant defence allocation, while silicon supplementation maintains resistance — Reyhani-Haghighi et al. 2026, Global Change Biology

This dataset contains raw data from a fully factorial glasshouse experiment examining the interactive effects of UV-B radiation intensity (low, moderate, high), silicon supplementation (−Si, +Si), and herbivory (−H, +H) on wheat (Triticum aestivum cv. Catapult) defence allocation and cotton bollworm (Helicoverpa armigera) physiology and performance.Plant measurements include foliar silicon concentration, oxidative stress markers (H₂O₂, MDA), antioxidant capacity (DPPH), phenolic-related defences (total phenolics, PAL, PPO activity), and nutritional quality (free amino acids, protein, carbohydrates).Insect measurements include relative growth rate (RGR), oxidative stress markers (H₂O₂, MDA, DPPH, phenoloxidase activity), and energy reserves (carbohydrates, glycogen, lipids, triglycerides, protein).A README sheet explains all treatment codes. This dataset supports the manuscript published in Global Change Biology (2026) by Reyhani-Haghighi et al.