Abstract
Three main varieties of kiwifruit exhibiting marked differences in flavor were selected for the study. Volatile profiles of three representative kiwifruit varieties were separated and identified by headspace-solid phase microextraction coupled with gas chromatography mass spectrometry (HS-SPME-GC-MS) and gas chromatography-ion mobility spectrometry (GC-IMS). A total of 48 compounds were identified by GC-MS in three samples, including aldehydes (16), alcohols (11), esters (16), and other compounds (5). Meanwhile, methyl hexanoate, ethyl hexanoate, hexanol, (E)-2-hexenal, hexanal, ethyl butanoate, and ethyl acetate were identified at a higher level by GC-IMS in all three varieties. Descriptive sensory (DSA) analysis was also performed to distinguish subtle differences of the kiwifruit varieties. Further partial least square regression analysis (PLSR) revealed that the fruity attribute was positively associated with ethyl butanoate, methyl hexanoate, and hexyl benzoate, while the grass aroma might be mainly due to (E)-2-hexenal, 3-hexenal, hexanol, and (E)-2-hexen-1-ol. As for sweet note, some esters, such as methyl butanoate ethyl butanoate and methyl hexanoate, were the main contributors. In addition, the cucumber-like and pungent notes were positively associated with (E,Z)-2,6-nonadienal and 1-penten-3-one, respectively.
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This research was conducted with support from National Natural Science Foundation of China (Grant No.31972195 and 32001825), Shaanxi Natural Science Foundation (Grant No.2019JQ-665), and Xi'an Agricultural Science and Technology Project (20NYYF0021).
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Yu Zhao designed the study and carried out the experimental work, analyzed data, and wrote the manuscript. Ping Zhan, Hong-Lei Tian, and Peng Wang revised the manuscript. Cong Lu, Peng Tian, and Yu-Yu Zhang assisted in the study design and the manuscript revision.
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Yu Zhao declare that he has no conflict of interest, Ping Zhan declare that he has no conflict of interest, Hong-Lei Tian declare that he has no conflict of interest, Peng Wang declare that he has no conflict of interest, Cong Lu declare that he has no conflict of interest, Peng Tian declare that he has no conflict of interest, Yu-Yu Zhang declare that he has no conflict of interest
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Zhao, Y., Zhan, P., Tian, HL. et al. Insights into the Aroma Profile in Three Kiwifruit Varieties by HS-SPME-GC-MS and GC-IMS Coupled with DSA. Food Anal. Methods 14, 1033–1042 (2021). https://doi.org/10.1007/s12161-020-01952-8
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DOI: https://doi.org/10.1007/s12161-020-01952-8