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| Penicillium and patulin distribution in pears contaminated with Penicillium expansum. Determination of patulin in pears by UHPLC-MS/MS |
| WEI Dong-mei1, 2*, XU Jun1*, DONG Feng-shou1, LIU Xin-gang1, WU Xiao-hu1, ZHENG Yong-quan1 |
1 Risk Assessment Laboratory for Biological Hazards of Agricultural Product Quality and Safety, Ministry of Agriculture/Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, P.R.China
2 College of Plant Protection, Shenyang Agricultural University, Shenyang 110161, P.R.China |
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Abstract The danger of mycotoxin contamination entering the food supply through post-harvest infection is of perennial concern to food safety experts. To explore the distribution of Penicillium expansum and diffusion of its mycotoxin, patulin, in blue mold-damaged pears, Pyrus bretschneideri Rehd. cv. Yali obtained from markets and orchards in China were artificially inoculated with P. expansum and assayed for patulin accumulation and degree of fungal colonization. The inoculated pears were incubated until the lesions were 5, 10, 20, or 30 mm in diameter. We sampled tissue at a range of distances from the lesion, measured the spread of Penicillium by plate colony-counting methods, and used UHPLC-MS/MS to detect and quantify the patulin concentration. More P. expansum colony-forming units were isolated from pears with a higher degree of decay. Farther from the lesion, the fewer P. expansum colonies were observed, and the lower the patulin content detected. We found a significant difference in the patulin content between samples due to lesion size, and also in tissue sampled 10 mm away from the lesion. In consideration of this finding, to ensure food safety, we recommend that when a blue mold rot lesion on pear is 5, 10, or 20 mm in diameter, 20, 30, and 40 mm beyond the lesion should be removed, respectively. If a lesion surpasses 30 mm in diameter, the whole pear should be thrown away.
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Received: 24 August 2016
Accepted:
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| Fund: This work was supported by the Quality and Safety Risk Assessment for Agro-products of China (GJFP 2015014). |
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Corresponding Authors:
WEI Dong-mei, E-mail: wdm11268@163.com;
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| About author: Correspondence ZHENG Yong-quan, Tel/Fax: +86-10-62815908, E-mail: zhengyongquan@ippcaas.cn |
Cite this article:
WEI Dong-mei, XU Jun, DONG Feng-shou, LIU Xin-gang, WU Xiao-hu, ZHENG Yong-quan.
2017.
Penicillium and patulin distribution in pears contaminated with Penicillium expansum. Determination of patulin in pears by UHPLC-MS/MS. Journal of Integrative Agriculture, 16(07): 1645-1651.
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