Chen Hongbin, Feng Shujuan, Chen Yazhen, Jiang Xuanjing, Lin Yuzhao, Chen Yihui
College of Oceanology and Food Science, Quanzhou Normal University, Quanzhou 362000, China.
Key Laboratory of Inshore Resources Biotechnology, Quanzhou Normal University, Quanzhou 362000, China.
Foods. 2024 Nov 28;13(23):3850. doi: 10.3390/foods13233850.
Postharvest guava fruit are at high risk of decay and spoilage, which extremely restrains the further advancement of guava industry in China. Currently, slightly acidic electrolyzed water (SAEW) has been shown to be potent in maintaining the storability of fruits and vegetables. Accordingly, this work was designed to figure out the effectiveness of SAEW on storability maintenance in postharvest guavas via regulating the phenylpropane metabolism. On the harvest day, fresh guavas were immersed in distilled water or SAEW (available chlorine concentration: 30 mg L) for 10 min, followed by storage for 15 d (25 °C, 80% RH). Results showed that, in comparation with the control guavas, SAEW-treated guavas exhibited lower levels of fruit disease index, malondialdehyde, and cell membrane permeability, while showing higher levels of fruit firmness and commercially acceptable fruit rate, as evidenced by enhanced contents of titratable acid, total soluble solids, vitamin C, total soluble sugar, and reducing sugar. Moreover, SAEW treatment improved the activities of disease-resistance enzymes and the contents of sinapic acid, -coumaric acid, ferulic acid, caffeic acid, and lignin. The above data revealed that SAEW treatment-enhanced storability of guavas was attributed to the increased disease-resistance enzyme activities and disease-resistance substance contents, which improved the fruit disease resistance and slowed down the disease occurrence.
采后果实极易腐烂变质，这极大地限制了我国番石榴产业的进一步发展。目前，弱酸性电解水已被证明在维持果蔬耐贮性方面具有显著效果。因此，本研究旨在通过调节苯丙烷代谢来探究弱酸性电解水对采后番石榴耐贮性的影响。在采收当天，将新鲜番石榴浸泡在蒸馏水或弱酸性电解水（有效氯浓度：30 mg/L）中10分钟，随后在25℃、相对湿度80%的条件下贮藏15天。结果表明，与对照番石榴相比，经弱酸性电解水处理的番石榴果实病害指数、丙二醛含量和细胞膜透性较低，而果实硬度和商品果率较高，可滴定酸、总可溶性固形物、维生素C、总可溶性糖和还原糖含量增加。此外，弱酸性电解水处理提高了抗病酶活性以及芥子酸、对香豆酸、阿魏酸、咖啡酸和木质素的含量。上述数据表明，弱酸性电解水处理提高番石榴耐贮性的原因是抗病酶活性和抗病物质含量增加，从而提高了果实抗病能力，减缓了病害发生。
