摘要
[目的]研究采前喷施CaCl2处理对西梅采后果实软化及细胞壁代谢的影响.[方法]以新疆喀什地区伽师县法兰西西梅为试材,采用2％CaCl2在西梅果实膨大期、转色期和采收期进行喷施,将采后的西梅果实置于温度为(4±1)℃、湿度为90％-95％的冷库中贮藏42do[结果]采前CaCl2处理抑制了西梅果实呼吸强度和细胞膜渗透率的上升,延迟了呼吸高峰的出现,延缓了原果胶和纤维素含量的下降,抑制了可溶性果胶(Soluble pectin WSP)、多聚半乳糖醛酸酶(Polygalacturonase PG)、果胶甲酯酶(Pectin methyl esterases PME)、纤维素酶(cellulase Cx)和β-葡萄糖苷酶(β-glucosidase β-Glu)活性的上升.CaCl2通过延缓细胞壁组分的降解,推迟了西梅果实的采后软化进程,有效保持了西梅果实采后的硬度.贮藏至28 d时,CaCl2处理西梅果实硬度、纤维素分别提高了 11.23％、8.51％,多聚半乳糖醛酸酶、果胶甲酯酶、纤维素酶和β-葡萄糖苷酶活性分别降低了 4.31％、32.60％、24.60％和64.38％.[结论]CaCl2采前处理是一种提高西梅果实采后品质的保鲜方法.
Abstract
[Objective]To study the effects of pre-harvest CaCl2 spray treatment on post-harvest fruit softening and cell wall metabolism of prunes.[Methods]Using Franciscan prunes from Jiashi County,Kash-gar Prefecture,Xinjiang,as the test material.2％CaCl2 was used to spray the fruits during the expansion,col-our change and harvesting periods,and the post-harvested prune fruits were placed in cold storage at a tem-perature of(4±1)℃ and a humidity of 90％-95％for 42 d.[Results]The results showed that preharvest CaCl2 treatment inhibited the rise in respiratory intensity and cell membrane perm ability of prune fruit,de-layed the onset of respiratory peaks,delayed the decline in raw pectin and cellulose content,and inhibited the rise in soluble pectin,polygalacturonase,pectin methyl esterase,cellulase and β-glucosidase activities.CaCl2 put off the post-harvest softening process of prune fruit by delaying the degradation of cell wall compo-nents,thus effectively maintaining the postharvest hardness of prune fruit.By 28 day of storage,the hardness of CaCl2 treated prune fruit increased by 11.23％,the cellulose content increased by 8.51％and the polyga-lacturonase,pectin methyl esterase,cellulase and β-glucosidase activities decreased by 4.31％,32.60％,24.60％and 64.38％,respectively.[Conclusion]Therefore,CaCl2 preharvest treatment is a preservation method to improve the post-harvest quality of prune fruit.
基金项目
科技创新领军人才项目—高层次领军人才(2022TSYCLJ0040)
新疆维吾尔自治区重点研发计划项目(2022B02026)
万方数据