Journal
FOOD CHEMISTRY
Volume 228, Issue -, Pages 211-218Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2017.01.086
Keywords
Kiwifruit; Juice; P. expansum; Patulin; Nonvolatile compounds; Volatiles profile
Funding
- National Natural Science Foundation of China [31371814, 31671866]
- National Basic Research Program of China [2013FY113400]
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Patulin (PAT) contamination and changes of nonvolatile and volatile compounds caused by Penicillium expansum in fresh juices of 8 kiwi cultivars were investigated. Growth and PAT production of P. expansum were greater at 25 degrees C than at 4 degrees C. P. expansum grew in kiwi juices under pH ranging from 2.75 to 3.27 and produced 45.10-268.88 mu g/mL of PAT at 25 degrees C. Decreases occurred in malic acid and soluble protein; while consumption and production simultaneously happened for reducing sugar, total soluble solid, titratable acid, citric acid, ascorbic acid and total phenolics. A large number of volatile organic compounds (VOCs) were produced during infection and each cultivar presented a distinct profile. Most of the alcohols, acids, ketones and phenols increased while aldehydes decreased. VOCs that were specific to infected kiwi juices are potential biomarkers for GC-MS analysis of kiwifruit infected by P. expansum. (C) 2017 Elsevier Ltd. All rights reserved.
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