不同浓度壳聚糖处理对采后西番莲果实耐贮性和贮藏品质的影响  

Effects of Different Concentrations of Chitosan Treatment on Storability and Storage Quality of Passion Fruit Postharvest

作　　者：郭欣 林育钊 曾玲珍 林静颖 余星星 林河通[2,3] GUO Xin;LIN Yuzhao;ZENG Lingzhen;LIN Jingying;YU Xingxing;LIN Hetong(School of Food Engineering,Zhangzhou Institute of Technology,Zhangzhou,Fujian 363000,China;School of Food Science,Fujian Agriculture and Forestry University,Fuzhou,Fujian 350002,China;Key Laboratory of Postharvest Biology of Subtropical Special Agricultural Products(Fujian Agriculture and Forestry University),Fujian Province University,Fuzhou,Fujian 350002,China)

机构地区：[1]漳州职业技术学院食品工程学院,福建漳州363000 [2]福建农林大学食品科学学院,福建福州350002 [3]亚热带特色农产品采后生物学(福建农林大学)福建省高校重点实验室,福建福州350002

出　　处：《热带作物学报》2020年第8期1665-1673,共9页Chinese Journal of Tropical Crops

基　　金：福建省科技计划项目(No.2018N2002);福建省财政厅科技项目(No.KLe16H01A);福建农林大学科技创新专项基金项目(No.KF2015051)。

摘　　要：为研究不同浓度壳聚糖处理对采后西番莲果实耐贮性和贮藏品质的影响,选取采后‘福建百香果1号’西番莲果实,用稀释50倍、100倍、150倍、200倍、250倍的卡多赞(壳聚糖)溶液浸泡5 min,以用蒸馏水浸泡5 min为对照,果实浸泡后取出晾干,之后用0.015 mm厚的聚乙烯薄膜袋密封包装(每袋装果10个),置于28℃和相对湿度80%条件下贮藏,贮藏期间每隔3 d取样,用于测定西番莲果实的耐贮性和贮藏品质指标。结果表明:与对照西番莲果实相比,壳聚糖处理能有效降低采后西番莲果实的呼吸强度,延缓果皮细胞膜透性的上升,降低果实失重率,保持较高的果实商品率;此外,壳聚糖处理能保持较高的外果皮L^*、a^*、b^*值及果皮花色素苷、类黄酮和总酚含量,维持较高的果肉可溶性固形物、可滴定酸、可溶性总糖、蔗糖、维生素C和类胡萝卜素含量。因此,壳聚糖处理能增强采后西番莲果实的耐贮性和维持较高的贮藏品质;其中,以稀释200倍的卡多赞溶液处理的保鲜效果最佳,可作为提高西番莲果实采后耐贮性、延长其保鲜期的适宜处理条件。The effects of different concentrations of chitosan treatment on the storability and storage quality of harvested passion(Passiflora caerulea L.)fruit were investigated in this study.The harvested passion(Passiflora caerulea L.cv.Fujian passion No.1)fruit were immersed in different concentrations of Kadozan(chitosan)solution with dilutions of 1∶50,1∶100,1∶150,1∶200,and 1∶250(VKadozan∶VKadozan+Water)for 5 min,while the passion fruit dipped in distilled water for 5 min as the control.The treated-passion fruits were air-dried for 0.5 h after dipped,then the passion fruits were packaged in polyethylene film bags with a thickness of 0.015 mm(10 passion fruits per bag),and stored at 28℃and 80%relative humidity for 15 days.During storage,three bags of passion fruits(30 passion fruits)from each group were sampled at 3-day interval and measured the indices of the storability and quality attributes of passion fruits.Compared with the control,Kadozan(chitosan)treatment could effectively reduce the respiration rate of the fruit,retard the increment of pericarp cell membrane permeability,decrease the weight loss percentage from fruit,but keep higher commercially acceptable fruit rate.Additionally,higher chromaticity values of L^*,a^*and b^*of the fruit surface,higher amounts of pericarp anthocyanin,flavonoid,and total phenolics,higher contents of pulp total soluble solid,titratable acidity,total soluble sugars,sucrose,vitamin C,and carotenoid were found in the Kadozan(chitosan)treated-passion fruit.Therefore,chitosan treatment could enhance the storability and retain higher storage quality of the passion fruits during postharvest storage.Among different concentrations of Kadozan(chitosan),the dilution of 1:200(VKadozan∶VKadozan+Water)revealed the best storability and quality attributes of the passion fruit,which could be a novel approach for increasing storability and extending the shelf-life of passion fruits during postharvest storage.

关 键 词：西番莲 果实 壳聚糖 卡多赞 耐贮性 品质特性 采后生理 

分 类 号：S667.9[农业科学—果树学] TS255.3[农业科学—园艺学]