Journal
LWT-FOOD SCIENCE AND TECHNOLOGY
Volume 146, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.lwt.2021.111402
Keywords
Shiitake mushrooms; Drying techniques; Taste attribute; Volatile fingerprint; HS-GC-IMS
Categories
Funding
- National Natural Science Foundation of China [31871762]
- Beijing Outstanding Young Scientist Program [BJJWZYJH01201910011025]
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New insights were provided on how different drying techniques affect the overall flavor characteristics of shiitake mushrooms, with VFD-HD showing the potential to combine the advantages of single HD and VFD, producing high-quality mushroom products.
New insight was systematically elucidated on variations of overall flavor characteristics in shiitake mushrooms (Lentinula edodes) affected by different drying techniques (hot air-drying (HD), vacuum freeze-drying (VFD), and VFD combined with HD (VFD-HD)). The volatile fingerprints of shiitake mushrooms were successfully established by headspace-gas chromatography-ion mobility spectrometry (HS-GC-IMS), and taste profiles and concentrations of non-volatile substances in mushrooms were analyzed. Comparison of aroma fingerprints associated with three drying approaches demonstrated that HD caused considerable losses of volatile compounds except for volatile acids, while VFD and VFD-HD preserved aroma compounds effectively. By application of PLSR analysis, strong seasoning-like and fruity aromas of VFD-HD mushrooms were closely correlated with 2,6-dimethylpyrazine and esters respectively. Additionally, the umami intensity of VFD-HD mushrooms was similar to HD samples and significantly higher than VFD ones. Furthermore, the correlation between the electronic tongue and sensory attributes was explored. The results obtained from this study revealed that VFD-HD could combine the advantages of single HD and VFD, producing high flavor quality mushroom products.
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