松针精油-茶氨酸涂膜结合自发气调与吸附剂对大球盖菇的保鲜效应OA

To explore an efficient preservation technology for Stropharia rugosoannulata,this study applied a composite coating agent consisting of 1.5%pine needle essential oil and 0.2%theanine,combined with biaxially oriented polypro-pylene(BOPP)spontaneous modified atmosphere packaging and adsorbent for comprehensive preservation treatment.Untreated S.rugosoannulata was used as the control.All samples were stored at 4℃and RH 85%for 10 days,and chang-es in sensory quality,mass loss rate,respiration rate,hardness,browning index,nutritional indices,as well as activities of polyphenol oxidase(PPO)and peroxidase(POD)were systematically evaluated.The results showed that compared with the control,the combined treatment(T3)significantly inhibited respiration rate(74.9%of T1 at day 10),reduced weight loss rate(5.0%),maintained a higher sensory score(6.67 points,74.2%higher than that of T1),and delayed the increase in browning index.Meanwhile,T3 effectively suppressed PPO and POD activities,maintained soluble protein content at 6.42  mg·g-1(25.1%higher than that of T1),and kept significantly higher levels of ascorbic acid and total phenols than the control at storage 8 d.In conclusion,the synergistic treatment combining pine needle essential oil-theanine coating with adsorbent and BOPP spontaneous modified atmosphere packaging can effectively delay the postharvest quality deteriora-tion of S.rugosoannulata through the dual actions of active antioxidation and passive modified atmosphere effects,pro-viding a technical reference for its storage and preservation.