College of Food Science, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China.
College of Food Science, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China.
Food Chem. 2018 Oct 30;264:1-8. doi: 10.1016/j.foodchem.2018.05.031. Epub 2018 May 5.
Disassembly of cell wall polysaccharides accompanied with softening is very common in harvested fruits. To develop a facile postharvest approach, which can be used at ambient temperature, for suppressing softening and maintaining higher nutritive cell wall polysaccharides of Younai plums, influences of paper containing 1-methylcyclopropene (1-MCP) on firmness, activities of cell wall-degrading enzymes, and contents of cell wall polysaccharide in Younai plums during storage at 25 ± 1 °C were investigated. As compared to the control plums, 1.2 μL·L 1-MCP-treated plums exhibited higher firmness, lower activities of cell wall-degrading enzymes (pectinesterase, polygalacturonase, cellulase and β-galactosidase), higher contents of cell wall polysaccharides (sodium carbonate-soluble pectin, chelate-soluble pectin, cellulose, and hemicelluloses), and lower content of water-soluble pectin. The results suggested that paper containing 1-MCP, which was convenient to apply under ambient temperature, could significantly inhibit activities of cell wall degrading-enzymes and decrease disassembly of cell wall polysaccharides, and subsequently retard softening in Younai plums.
细胞壁多糖的解体伴随着软化在收获的水果中非常常见。为了开发一种简便的采后方法，可以在环境温度下使用，以抑制软化并保持油奈李更高的营养细胞壁多糖，研究了含有 1-甲基环丙烯（1-MCP）的纸张对硬度、细胞壁降解酶活性和细胞壁多糖含量的影响。与对照李子相比，用 1.2μL·L 1-MCP 处理的李子表现出较高的硬度、较低的细胞壁降解酶（果胶酯酶、多聚半乳糖醛酸酶、纤维素酶和β-半乳糖苷酶）活性、较高的细胞壁多糖含量（碳酸钠溶性果胶、螯合溶性果胶、纤维素和半纤维素）和较低的水溶性果胶含量。结果表明，在环境温度下使用方便的 1-MCP 纸能显著抑制细胞壁降解酶的活性，减少细胞壁多糖的解体，从而延缓油奈李的软化。
