催熟对采后菠萝品质的影响与光谱识别

为探究催熟对采后菠萝品质的影响,并寻找一种快速检测品质的方法,本实验探究了催熟与未催熟菠萝采后一定贮藏期内黑心程度变化与果心、果肉和整果的可溶性固形物(total soluble solid,TSS)、可滴定酸(titratable acid,TA)质量分数变化,并探究可见/近红外光谱(visible near/inf...

Effect of Artificial Ripening on Postharvest Pineapple Fruit Quality and Its Recognition by Spectroscopy

To explore the effect of artificial ripening on postharvest pineapple fruit quality and develop a fast quality recognition method, the changes in black heart symptoms as well as the contents of total soluble solids (TSS) and titratable acid (TA) in the flesh, heart, and whole fruit of ripened and unripened pineapples during postharvest storage were determined, and the feasibility of applying visible near/infrared (VIS/NIR) spectroscopy to the real-time recognition and prediction of pineapple quality was evaluated. The order of TSS and TA contents in both treated and untreated pineapples was flesh > whole fruit > heart. TSS content was higher in ripened pineapples than in unripended ones at the early stage of postharvest storage; TSS content gradually declined with storage time in the former, while it increased in the latter. TA content was higher in ripened pineapples than in unripended ones at the early stage of storage, showing no obvious changing trend with storage time in the former but a continuous increasing trend in the latter. The order of TSS/TA ratio in the ripened and unripened pineapples was heart > whole fruit > flesh. At day 4 postharvest, TSS/TA ratio was higher in unripened pineapples than in ripened ones, and the difference became smaller with the prolongation of storage time. At day 9, TSS, TA contents and TSS/TA ratio were similar between them. It was feasible to apply VIS/NIR spectroscopy to acquire the features of pineapples, allowing identification whether pineapples were artificially ripened, black heart degree, ripened pineapples at different storage times (at days 4, 5, 6, 7, 8 and 9 postharvest), and unripened pineapples at different storage times (at days 4, 5–7, 8 and 9 postharvest) and prediction of whether black heart would occur at day 6. The results of this study provide a reference for pineapple planting and postharvest management and are of positive significance to the pineapple industry.