Total quality index of commercial oyster mushroom Pleurotus sapidus in modified atmosphere packaging

Wan-Mohtar, Wan Abd Al Qadr Imad and Klaus, Anita and Cheng, Acga and Salis, Shardana Aiga and Abdul Halim-Lim, Sarina (2019) Total quality index of commercial oyster mushroom Pleurotus sapidus in modified atmosphere packaging. British Food Journal, 121 (8). pp. 1871-1883. ISSN 0007-070X

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Official URL: https://doi.org/10.1108/BFJ-06-2018-0408

Abstract

Purpose: The purpose of this paper is to identify the strain of oyster mushroom (OM) Pleurotus sapidus cultivated in a local (commercial) farm, and to generate a total quality index (TQI) on the strain using different modified atmosphere packaging (MAP) gas mixtures. Design/methodology/approach: A phylogenetic tree was constructed using the MEGA software to identify the specific strain of P. sapidus grown in a local farm. The effects of MAP on fresh fruiting bodies of the identified strain were determined under three conditions: high carbon dioxide packaging (HCP: 20 per cent CO2, 15 per cent O2), low carbon dioxide packaging (LCP: 2 per cent CO2, 30 per cent O2) and high nitrogen packaging (HNP: 85 per cent N2, 15 per cent O2). All samples were stored at 4 oC for up to ten days, and subjected to total phenolic content (TPC), colour retention (CR) and sensory analysis. Quality parameters such as chewiness and odour were used to obtain the TQI. Findings: From the phylogenetic analysis, a new strain (P. sapidus strain QDR) with 99 per cent similarity to P. sapidus was identified. Among the three MAP treatments, HCP recorded the highest TPC (2.85 mg GAE/g) and CR (60.36) after ten days, although only its CR was significantly different (p<0.05) from the control. Feedback from 30 sensory panellists indicated that both HCP and LCP were generally more effective in retaining the colour–odour of OM. The optimum TQI for HCP was obtained based on the observed parameters, which is useful for the large-scale packaging of OM. Originality/value: Scientific evidence has revealed that packaging trend for commercially grown OM affects consumer’s acceptance. © 2019, Emerald Publishing Limited.

Item Type: Article
Uncontrolled Keywords: Modified atmosphere packaging; Oyster mushroom; Phylogenetic analysis; Pleurotus sapidus; Total quality index
Subjects: Q Science > Q Science (General)
Q Science > QH Natural history
Q Science > QR Microbiology
Divisions: Faculty of Science > Institute of Biological Sciences
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 02 Dec 2019 09:13
Last Modified: 02 Dec 2019 09:13
URI: http://eprints.um.edu.my/id/eprint/23180

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