【摘要】 为探讨松香基保鲜剂对柑橘果实采后的保鲜效果,以马来松香季戊四醇酯(MRPE)为主要成分制备保鲜剂,在室温下对椪柑进行采后涂膜保鲜处理,每隔6 d测定相关指标并与市售保鲜剂吗啉脂肪酸盐(MFAS)的保鲜效果进行对比,且以清水处理样品为空白对照。研究结果表明:当贮藏至42 d时,MRPE涂膜处理的椪柑的失重率仅为11.39%,比空白对照组低31.39%;硬度为1.61 N,硬度变化明显小于MFAS涂膜处理组和空白对照组。MRPE和MFAS涂膜处理均能抑制椪柑中可溶性固形物和可滴定酸的变化,以及丙二醛(MDA)含量的上升。椪柑中超氧化物歧化酶(SOD)、过氧化物酶(POD)和过氧化氢酶(CAT)的活性提高,贮藏42 d时,SOD、POD和CAT的活性分别为9.90、 1.26和1.02 U/g。综合各指标发现,MRPE涂膜处理对椪柑的保鲜效果优于市售保鲜剂MFAS涂膜处理,表明马来松香季戊四醇酯在椪柑贮藏保鲜方面有很好的应用前景。更多还原

【Abstract】 In order to explore the preservation effect of rosin-based antistaling agent on postharvest citrus fruits,maleic rosin pentaerythritol ester(MRPE) was used as main component to prepare preservative, which was coated on ponkan for preservation and compared with uncoated ponkan and ponkan coated by morpholine fatty acid salt(MFAS) at room temperature storage conditions.Relevant indexes were measured every 6 days, and the results showed that after storing for 42 days, the weight loss rate of ponkan coated by MRPE coatings was 11.39%, which was 31.39% lower than that of the blank control group;firmness of ponkan coated by MRPE coatings was 1.61 N and the changes of firmness were lower than those coated by MFAS and the blank control; meanwhile, MRPE and MFAS coatings all could effectively inhibited the changes of soluble solids content and titratable acid content and the increase of malondialdehyde content(MDA). At the same time, the activities of superoxide dismutase(SOD), peroxidase(POD) and catalase(CAT) of ponkan coated by MRPE were increased which were 9.90, 1.26 and 1.02 U/g after storing for 42 days. These results showed that the preservation effect of MRPE coating treatment was better than that of MFAS treatment, which indicated that rosin resin had a good application prospect in postharvest preservation of ponkan.更多还原