Cell wall degradation accompanied with softening is very common in harvested fruit. To develop a facile postharvest approach, which can be used at ambient temperature, for suppressing softening and maintaining quality of banana fruit, influences of 1% procyanidin (PA) solution treatment on pulp firmness, total soluble solids (TSS) in pulp, peel hue value, chlorophyll content of peel, fruit ethylene production, fruit respiration rate, malondialdehyde (MDA) concentration in peel, peel ion leakage, activities and expression levels of enzymes related with fruit softening during storage at 23 ± 2°C were investigated. Results indicated that PA treatment effectively inhibited ripening-associated processes, as compared to the control banana fruit, PA-treated fruit exhibited higher firmness, hue value and chlorophyll content, lower TSS content, ethylene production, respiration rate, MDA concentration, and ion leakage. Besides, lower activities of cell wall-degrading enzymes polygalacturonase (PG), pectin methyl esterase (PME), pectate lyase (PL), and cellulase (CX) and expression levels of PG, PME, PL were also observed in PA-treated fruit. These results would provide theoretical basis to help solve fruit quality decline of banana fruit during storage in further research.

伴随软化的细胞壁降解在收获的水果中非常常见。开发一种简便的采后方法，可在常温下使用，抑制香蕉果实的软化和保持品质，1% 原花青素 (PA) 溶液处理对果肉硬度、果肉中的总可溶性固体 (TSS)、果皮色调的影响值、果皮叶绿素含量、果实乙烯产量、果实呼吸速率、果皮中丙二醛（MDA）浓度、果皮离子泄漏、与果实软化相关的酶的活性和表达水平在 23±2°C 储存期间进行了调查。结果表明，PA 处理有效地抑制了成熟相关过程，与对照香蕉果实相比，PA 处理的果实表现出更高的硬度、色相值和叶绿素含量，更低的 TSS 含量，乙烯产量、呼吸速率、MDA 浓度和离子泄漏。此外，细胞壁降解酶聚半乳糖醛酸酶 (PG)、果胶甲酯酶 (PME)、果胶酸裂解酶 (PL) 和纤维素酶 (CX) 的活性降低，以及在 PA 处理的果实中也观察到PG、PME、PL。这些结果将为进一步研究解决香蕉果实在贮藏过程中果实品质下降的问题提供理论依据。