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Automatic periodical SO 2 fumigation improves the storage quality of tender ginger
Author(s) -
Jia Xiaoyu,
Du Meijun,
Zheng Yanli,
Chen Lan,
Song Jianxin,
Tang Xianpu,
Liu Haidong,
Li Jiangkuo,
Li Xihong
Publication year - 2021
Publication title -
journal of food processing and preservation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.511
H-Index - 48
eISSN - 1745-4549
pISSN - 0145-8892
DOI - 10.1111/jfpp.14949
Subject(s) - fumigation , quality (philosophy) , chemistry , toxicology , food science , horticulture , biology , physics , quantum mechanics
Rhizome rot and quality deterioration of tender ginger after harvest were the restricting factors of tender ginger storage quality. In this research, cold storage with SO 2 fumigation function was designed and the effects of 0.2, 0.5, and 1.0 ml L −1 SO 2 fumigation every 15 d on the storage quality of tender ginger was investigated. The improved cold storage and supporting equipment can automatically fill and remove SO 2 gas into the storage room, and keep the humidity stable at 92%–95% during storage. Experimental results showed that automatic periodical SO 2 fumigation of tender ginger with 0.5 ml L −1 SO 2 every 15 d can effectively maintain firmness (~56%), retard weight loss (~22%), reduce decay rate (~20%), and inhibit the accumulation of malondialdehyde (MDA) content (~26%). Meanwhile, the 0.5 ml L −1 SO 2 treatment enhanced the disease resistance of tender ginger by enhancing phenylalanine ammonia lyase (PAL) activity (~8%) and inhibiting polyphenol oxidase (PPO) activity (~25%), and the integrity of tissue structure was also well maintained. More importantly, the SO 2 residue in the tender ginger treated with the 0.5 ml L −1 SO 2 completely met the FDA food safety standard on the 50 d. Therefore, the combination of cold storage structure innovation and 0.5 ml L −1 SO 2 periodical fumigation is more effective at improving the storage quality of tender ginger. Practical applications Automatic periodical SO 2 fumigation showed great potential application in maintaining the storage quality of ginger after harvest. The activity levels of defense enzymes were significantly increased and the storage quality of tender ginger was well maintained. Automatic periodical fumigation of tender ginger with 0.5 ml L −1 SO 2 is a simple, safe, low cost, and convenient method to improve the storage quality of tender ginger.