Horticulture, School of Science, Edith Cowan University, 270 Joondalup Drive, Joondalup 6027, Western Australia, Australia.
Horticulture, School of Science, Edith Cowan University, 270 Joondalup Drive, Joondalup 6027, Western Australia, Australia.
Food Chem. 2025 Jan 1;462:141020. doi: 10.1016/j.foodchem.2024.141020. Epub 2024 Aug 28.
The effects of preharvest methyl jasmonate (MeJA) spray application on the physicochemical quality, metabolism of phenolics, and cell wall components in raspberries were investigated during a 10-day cold storage period. MeJA spray reduced firmness loss, decay incidence, and weight loss, while maintained higher levels of soluble solids content, ascorbic acid, anthocyanins and flavonoids in raspberries. Furthermore, MeJA application resulted in increased total pectin and protopectin levels, as well as lowered water-soluble pectin, and activities of pectin methyl esterase, polygalacturonase and cellulase enzymes. Additionally, MeJA treatment upregulated the phenylpropanoid pathway, leading to higher endogenous phenolics and activities of phenylalanine-ammonia lyase and shikimate dehydrogenase. In conclusion, preharvest MeJA spray application could be adopted to enhance the storage potential of cold-stored raspberries for 10 days by maintaining higher firmness, assuring better physicochemical quality, and increasing phenolic metabolism, while reducing cell wall hydrolysis.
采前茉莉酸甲酯（MeJA）喷雾处理对冷藏 10 天期间树莓理化品质、酚类代谢和细胞壁成分的影响。MeJA 喷雾处理降低了果实硬度损失、腐烂发生率和失重，同时保持了较高的可溶性固形物含量、抗坏血酸、花青素和类黄酮水平。此外，MeJA 处理增加了总果胶和原果胶水平，降低了水溶性果胶和果胶甲酯酶、多聚半乳糖醛酸酶和纤维素酶的活性。此外，MeJA 处理上调了苯丙烷途径，导致内源性酚类和苯丙氨酸解氨酶和莽草酸脱氢酶的活性增加。综上所述，采前 MeJA 喷雾处理可通过保持较高的硬度、保证更好的理化品质和增加酚类代谢、同时减少细胞壁水解来提高冷藏 10 天的树莓贮藏潜力。
