4.7 Article

Postharvest quality and shelf life of radish microgreens as impacted by storage temperature, packaging film, and chlorine wash treatment

Journal

LWT-FOOD SCIENCE AND TECHNOLOGY
Volume 55, Issue 2, Pages 551-558

Publisher

ELSEVIER
DOI: 10.1016/j.lwt.2013.09.009

Keywords

Radish microgreens; Storage temperature; MAP; Chlorine wash; Shelf life

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Microgreens are new and emerging products, which are young seedlings of vegetables and herbs. A recent study showed that microgreens contain higher nutrients compared to their mature counterparts. However, they typically have a short shelf life (1-2 days) at ambient temperature. The objective of this study was to optimize postharvest handling conditions to reduce the quality loss and extend the shelf life of daikon radish (Raphanus sativus L var. longipinnatus) microgreens. Storage temperature, packaging film, and wash treatment were investigated. Changes in headspace composition, quality index, chlorophyll concentration, tissue electrolyte leakage, and aerobic mesophilic bacteria (AMB) and yeast & mold (Y&M) counts were monitored periodically during storage. Results indicated that (1) storage temperature significantly (P < 0.05) affected package atmosphere, product quality and shelf life. One degree Celsius was the optimal temperature for storage of radish microgreens with no chilling injury observed; (2) film oxygen transmission rate (OTR) significantly (P < 0.05) affected O-2 and CO2 composition, but OTR did not significantly affect quality attributes during 28 days of storage at 1 degrees C; (3) Chlorine wash treatment (100 mg/L) significantly reduced initial microbial populations by 0.5 log cfu g(-1), including AMB and Y&M. However, microbial populations rebounded after day 7. (C) 2013 Elsevier Ltd. All rights reserved.

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