Effects of in-package atmospheric cold plasma treatment on the qualitative, metabolic and microbial stability of fresh-cut pears.

Background The greatest hurdle to commercial marketing of fresh-cut fruits and vegetables is limited shelf-life due to microbial hazards and quality deterioration. Atmospheric cold plasma (ACP) is an emerging non-thermal technology with significant potential to improve the safety and storability of fresh products. The objective of this study was to evaluate the effects of ACP, generated in sealed packaging, on the qualitative, metabolic and microbial stability of fresh-cut pears during simulated cold storage. Results ACP treatments were effective in inhibiting the growth of mesophilic aerobic bacteria, and yeast and mold, particularly CP3 (65 kv, 1 min) which could prolong shelf-life to most extent. While decontamination was not always associated with an increase in plasma intensity. Moreover, at 65 kv for 1 min, ACP treatment had the potential to retard respiration, maintain organoleptic properties and other quality attributes. Additionally, peroxidase and pectin methylesterase (PME) activities were reduced immediately after treatments. These effects were dependent on treatment voltage and time while a subsequent recovery in activity was only observed for PME. Conclusions The results obtained from this study will contribute to the understanding of the effects of in-package ACP treatments on the storability and microbial safety of fresh-cut pears. This knowledge could be beneficial in reducing quality losses for fresh-cut pears and the preservation of other products. This article is protected by copyright. All rights reserved.