乳酸钙-曲酸真空渗透处理对双孢蘑菇采后品质及微观结构的影响

Effects of Calcium Lactate and Kojic Acid Complex by Vacuum Infiltration on Quality and Microstructure of Postharvest Agaricus bisporus

基于能增加质量传递的真空促渗技术,以双孢蘑菇为研究对象,研究乳酸钙、曲酸、乳酸钙-曲酸复合体系3组处理对其采后贮藏品质、生理生化指标及细胞微观结构的影响,以及乳酸钙、曲酸、乳酸钙-曲酸复合体系对双孢蘑菇采后品质的影响及其协同复合效应。结果表明:在贮藏过程中,3组处理均显著优于对照组(P<0.05),可较好地保持双孢蘑菇的外观品质,减缓开伞率和水分散失、缓褐变;对呼吸强度和多酚氧化酶(PPO)的活性具有抑制作用,降低丙二醛的含量;较好地保持细胞的膜透性及结构的完整性,并且复合体系有一定的协同效应,处理效果优于乳酸钙和曲酸单独体系。

The study was aimed to investigating the influence of calcium lactate, kojic acid, calcium lactate-kojic acid complex treatment by vacuum infiltration on postharvest quality and microstructure of Agaricus bisporus. Agaricus bisporus were immersed in solutions （1.5% calcium lactate, 0.05% kojic acid, 1.5% calcium lactate -0.05% kojic acid complex） under vacuum （-0.05 MPa） for 3-4 seconds and then stored at（2＋1）℃ for 15 days. The results indicated that percentage cap opening and water loss of three treatments decreased and browning degree was postponed; polyphenol oxi- dase （PPO） activity and respiration rate of three treatments were inhibited significantly. Meanwhile, malondialdehyde con- tent and cell membrane permeability decreased which indicated three treatments could reduce membrane peroxidation and maintain the integrity and stability of cell membrane. Scanning electron microscopy （SEM） showed the cell membrane of treatments group, damaged slightly and produced less fragments compared with the control group. The complex group was more effective on storage quality and microstructurc of Agaricus bisporus than the other treatments.