Evaluation of cold plasma for decontamination of molds and mycotoxins in rice grain

Jian Guo; Zhiping He; Chao Ma; Wanting Li; Jiaoyu Wang; Fucheng Lin; Xingquan Liu; Ling Li

doi:10.1016/j.foodchem.2022.134159

Evaluation of cold plasma for decontamination of molds and mycotoxins in rice grain

Food Chem. 2023 Feb 15:402:134159. doi: 10.1016/j.foodchem.2022.134159. Epub 2022 Sep 8.

Authors

Jian Guo¹, Zhiping He¹, Chao Ma¹, Wanting Li¹, Jiaoyu Wang², Fucheng Lin², Xingquan Liu³, Ling Li⁴

Affiliations

¹ College of Food and Health, Zhejiang Agriculture & Forestry University, No. 666 Wusu Street, Hangzhou 311300, China.
² State Key Laboratory for Managing Biotic and Chemical Treats to the Quality and Safety of Agro-products, Institute of Plant Protection and Microbiology, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China.
³ College of Food and Health, Zhejiang Agriculture & Forestry University, No. 666 Wusu Street, Hangzhou 311300, China. Electronic address: liuxq@zafu.edu.cn.
⁴ The Key Laboratory for Quality Improvement of Agricultural Products of Zhejiang Province, College of Advanced Agricultural Sciences, Zhejiang Agriculture & Forestry University, No. 666 Wusu Street, Hangzhou 311300, China. Electronic address: liling@zafu.edu.cn.

PMID: 36137380
DOI: 10.1016/j.foodchem.2022.134159

Abstract

Few reports are on the application of cold plasma (CP) for mold and mycotoxin control in grain. The aim of this study was to evaluate the viability of CP for mycotoxin and mold control in rice grain. Rice grains artificially contaminated with molds or mycotoxins were subjected to CP treatment. The microbial activities of Aspergillus niger, Rhizopus oryzae, Penicillium verrucosum and Fusarium graminearum were significantly inhibited by CP treatment. The maximal reduction of DON and OTA were 61.25 % and 55.64 %, respectively. The electrical conductivity and malondialdehyde content in rice grain increased at most by 30.14 % and 103.27 %, respectively. The seed germination reduced significantly when treatment time reached 8 min. The major nutrients of rice grain were not affected except for prolamine, which was generally consistent with the results of electron microscopy and Fourier-transform infrared analysis. Cold plasma is a promising method for mold and mycotoxin control in rice grain.

Keywords: Deoxynivalenol; Microbial activity; Nonthermal food processing; Ochratoxin; Rice quality; Toxigenic fungi.

MeSH terms

Decontamination
Edible Grain / chemistry
Food Contamination / analysis
Fungi
Fusarium*
Malondialdehyde
Mycotoxins* / analysis
Oryza*
Phenylpropanolamine
Plasma Gases*

Substances

Mycotoxins
Plasma Gases
Malondialdehyde
Phenylpropanolamine