Effects of Different LED Lighting Durations on the Quality of Postharvest Blueberry Fruit during Low-temperature Storage

YUAN Xinhong; JI Ning; LIU Bangdi; WANG Rui; LI Xiang; JIANG Yuanfei

doi:10.19554/j.cnki.1001-3563.2026.19.008

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Packaging Engineering ›› 2026, Vol. 47 ›› Issue (19) : 76-84. DOI: 10.19554/j.cnki.1001-3563.2026.19.008

Agro-products Preservation and Food Packaging

Effects of Different LED Lighting Durations on the Quality of Postharvest Blueberry Fruit during Low-temperature Storage

YUAN Xinhong^1,2, JI Ning^1,2,*, LIU Bangdi³, WANG Rui^1,2, LI Xiang^1,2, JIANG Yuanfei^1,2

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Abstract

The work aims to investigate the effects of different LED lighting durations on the quality and physiological metabolism of postharvest "powderblue" blueberries stored at 1 °C low-temperature environment and improve the theoretical basis for green postharvest preservation technology for blueberries. With 8-ripe "powderblue" blueberries from Majiang, Guizhou as the test material, three groups were set for full storage period with light protection (0 h), daily LED white light exposure for 12 h and 24 h, low-temperature storage for 40 days, and fruit appearance quality and physiological and biochemical indicators were measured every 10 days, combined with principal component analysis for comprehensive evaluation. LED light treatment delayed the decline of vitamin C, polyphenols, and anthocyanins while maintaining high peroxidase (POD) and superoxide dismutase (SOD) activities, inhibiting the increase in lipoxygenase (LOX) activity and reducing the accumulation of membrane lipid peroxidation products (MDA). However, under prolonged light conditions, fruit hardness decreased rapidly, and fruit softening was not fully regulated by LOX. Principal component analysis showed a cumulative contribution rate of 90.85% for the two principal components. Titratable acids, polyphenols, anthocyanins, and soluble solids were core indicators reflecting differences in blueberry low-temperature storage quality. Among all experimental treatments, the 24-hour continuous LED light treatment group attained the highest comprehensive quality score, while the 12-hour intermittent light group tended to be between the other two groups. Continuous 24 hours of LED lighting is more beneficial for preserving fruit nutrients and color quality. The overall performance of daily 12 hours of LED light treatment falls between light protection and continuous 24 hours of light treatment. In actual production, the appropriate lighting duration can be selected based on storage goals and quality requirements to balance nutritional retention and hardness.

Key words

"powderblue" blueberry / LED lighting duration / low-temperature / storage quality / principal component analysis

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YUAN Xinhong, JI Ning, LIU Bangdi, WANG Rui, LI Xiang, JIANG Yuanfei. Effects of Different LED Lighting Durations on the Quality of Postharvest Blueberry Fruit during Low-temperature Storage[J]. Packaging Engineering. 2026, 47(19): 76-84 https://doi.org/10.19554/j.cnki.1001-3563.2026.19.008

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