Effect of preharvest spraying of CaCl2 on postharvest fruit softening quality of prunes

doi:10.6048/j.issn.1001-4330.2024.07.019

Abstract

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, Kashgar Prefecture, Xinjiang, as the test material.2% CaCl₂ was used to spray the fruits during the expansion, colour change and harvesting periods, and the post-harvested prune fruits were placed in cold storage at a temperature 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, delayed 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 components, 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 polygalacturonase, 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.

Key words: calcium chloride; pre-harvest; prunes; cell wall metabolism

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42 d。【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。

关键词: 氯化钙, 采前, 西梅, 细胞壁代谢

CLC Number:

S662.4

TIAN Quanming, YAN Beibei, QI Huamei, WEI Jia, ZHANG Zheng, XIN Shijun, WANG Man, YUAN Yuyao, WU Bin. Effect of preharvest spraying of CaCl₂ on postharvest fruit softening quality of prunes[J]. Xinjiang Agricultural Sciences, 2024, 61(7): 1717-1726.

田全明, 殷贝贝, 祁华梅, 魏佳, 张政, 邢世均, 王曼, 袁宇尧, 吴斌. 采前喷施CaCl₂对西梅采后果实软化品质的影响[J]. 新疆农业科学, 2024, 61(7): 1717-1726.

Figures/Tables 9

Fig.1 Changes of CaCl2 treatment on firmness of postharvest prune fruit Note:*Significantly different between two groups for the same storage time(P<0.05)

Fig 2 Changes of CaCl2 treatment on the respiratory intensity of postharvest prune fruit

Fig.3 Changes of CaCl2 treatment on the cell membrane permeability of postharvest prune fruit

Fig.4 Changes of CaCl2 treatment on PP(a) and WSP(b) contents of postharvest prune fruit

Fig.5 Changes of CaCl2 treatment on cellulose content of postharvest prune fruit

Fig.6 Changes of CaCl2 treatment on PG activity of postharvest prune fruit

Fig.7 Changes of CaCl2 treatment on PME activity of postharvest prune fruit

Fig.8 Changes of CaCl2 treatment on Cx activity of postharvest prune fruit

Fig.9 Changes of CaCl2 treatment on β-Glu activity of postharvest prune fruit

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Effect of preharvest spraying of CaCl₂ on postharvest fruit softening quality of prunes

采前喷施CaCl₂对西梅采后果实软化品质的影响

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