Guirao A, Martínez-Romero D, Solana-Guilabert A, Agulló V, Díaz-Mula H M, Valverde J M
Institute for Agro-food and Agro-environmental Research and Innovation (CIAGRO) - University Miguel Hernández (UMH), Ctra. Beniel km. 3.2, 03312 Orihuela, Alicante, Spain.
Institute for Agro-food and Agro-environmental Research and Innovation (CIAGRO) - University Miguel Hernández (UMH), Ctra. Beniel km. 3.2, 03312 Orihuela, Alicante, Spain.
Food Chem. 2025 Jul 30;481:144105. doi: 10.1016/j.foodchem.2025.144105. Epub 2025 Mar 30.
Blood oranges are valued for their color and nutritional properties, thriving in Mediterranean climates where temperature variations enhance anthocyanin (ACN) synthesis. Climate change threatens this process. This study evaluated six foliar applications of sorbitol (2 %, 5 %) and sorbitol-Ca (2 % + 0.7 %) from early fruit development to harvest. All treatments enhanced peel and pulp redness, particularly sorbitol-Ca, as confirmed by lower hue angle and higher color index. Treated fruits had higher total soluble solids (TSS), with 11.07 % in 2 % sorbitol-treated fruits versus 9.63 % in controls. Sorbitol-Ca reduced respiration rates (15.63 vs. 21.57 mg CO₂ kg h) and increased firmness (9.72 vs. 8.89 Nmm). Phenolic content, antioxidant activity, and bound calcium levels improved fruit quality. ACN content increased over 20 % and 40 % in sorbitol- and sorbitol-Ca-treated fruits, mainly due to Cyanidin derivatives. Sorbitol-based treatments offer a strategy to enhance blood orange resilience to climate change, improving functional and commercial value.
血橙因其颜色和营养特性而受到重视，在地中海气候中生长旺盛，那里的温度变化会促进花青素（ACN）的合成。气候变化威胁着这一过程。本研究评估了从果实发育早期到收获期六种叶面喷施山梨醇（2%、5%）和山梨醇钙（2% + 0.7%）的效果。所有处理均增强了果皮和果肉的红色，尤其是山梨醇钙，较低的色相角和较高的颜色指数证实了这一点。处理过的果实总可溶性固形物（TSS）含量更高，2%山梨醇处理的果实中TSS含量为11.07%，而对照果实中为9.63%。山梨醇钙降低了呼吸速率（15.63对21.57毫克二氧化碳/千克·小时）并提高了硬度（9.72对8.89牛顿毫米）。酚类物质含量、抗氧化活性和结合钙水平改善了果实品质。山梨醇和山梨醇钙处理的果实中ACN含量分别增加了20%以上和40%，主要是由于矢车菊素衍生物。基于山梨醇的处理提供了一种提高血橙对气候变化适应能力的策略，改善了其功能和商业价值。
