Impact of electrostatic atomized water particles (EAWPs) treatment on chlorophyll degradation and delay ripening in Thai banana (Musa paradisiaca, cv. ‘Namwa’ banana) during storage

Nurainee, Salaemae and Nutthachai, Pongprasert and Surisa, Phornvillay and Samak, Kaewsuksaeng and Masayoshi, Shigyo and Shinichi, Ito and Naoki, Yamauchi and Varit, Srilaong (2023) Impact of electrostatic atomized water particles (EAWPs) treatment on chlorophyll degradation and delay ripening in Thai banana (Musa paradisiaca, cv. ‘Namwa’ banana) during storage. The Horticulture Journal. pp. 1-12. ISSN 2189-0110

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Abstract

Electrostatic atomized water particles (EAWPs) treatment was applied to investigate its effect on chlorophyll (Chl) degradation and delaying of ripening in ‘Namwa’ banana. Banana fruits were pretreated with EAWPs generated from a device (Panasonic F-GMK01) for 0 (control), 0.5, 1.0, 1.5, and 3.0 h in a closed 50 L container, and then kept in perfolated polypropylene plastic bags and stored at ambient temperature (25±2 °C) under dark condition. The results showed that 1.0 h-EAWPs treatment best retained peel greenness with a significantly higher hue angle and lower L* value than other treatments on day 6. Also, the 1.0 h-EAWPs treatment maintained the total Chl content, firmness, total soluble solids (TSS) and delayed the ripening index (RI) of fruit accompanied with a delayed climacteric rise of ethylene and respiration rate compared to control. It was found that the 1.0 h-EAWP treatment induced accumulations of nitric oxide (NO) in peel tissues and suppressed the activities of Chl degrading enzymes (chlorophyllase, Mg-dechelatase, Chl-degrading peroxidase, and pheophytinase) in the peel. Furthermore, Chl derivatives levels (chlorophyllide a, pheophobide a, 132-hydroxychlorophyll a, and pheophytin a) were higher in fruits treated with EAWPs than the control fruits. The results suggest that EAWPs technology could be an alternative approach to delay the Chl degradation and ripening in ‘Namwa’ banana.

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