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Influence of fresh-cut process on γ-aminobutyric acid (GABA) metabolism and sensory properties in carrot

Hou Y 1 , Ren H 1 , Wang K 1 , Cao S 2 , Zheng Y 3 , Wei Y 1 Show all authors , Shao X 1 , Wang H 1 , Xu F 1

Affiliations 

  • 1 Zhejiang-Malaysia Joint Research Laboratory for Agricultural Product Processing and Nutrition, College of Food and Pharmaceutical Sciences, Ningbo University, Ningbo, 315211 Zhejiang People's Republic of China
  • 2 College of Biological and Environmental Sciences, Key Laboratory of Fruits and Vegetables Postharvest and Processing Technology Research of Zhejiang Province, Zhejiang Wanli University, Ningbo, 315100 Zhejiang People's Republic of China
  • 3 College of Food Science and Technology, Nanjing Agricultural University, Nanjing, 210095 Jiangsu People's Republic of China
J Food Sci Technol, 2022 Feb;59(2):552-561.
PMID: 35185175 DOI: 10.1007/s13197-021-05039-y

Abstract

Effect of fresh-cut procedure on the accumulation of GABA in carrots via γ-aminobutyric acid (GABA) shunt and polyamines degradation pathway was investigated. Results showed that fresh-cut processing enhanced glutamate decarboxylase (GAD) activity and expression levels of DcGAD1 and DcGAD2, while reduced GABA transaminase (GABA-T) activity and DcGABA-T1 expression level, which induced the more glutamate (Glu) conversion to GABA. Polyamines (PAs) in shredded carrots were significantly lower than the whole, due to the elevated activities of diamine oxidase (DAO), polyamine oxidase (PAO) and aminoaldehyde dehydrogenase (AMADH) and DcPAO expression level, which indicated that the polyamines degradation pathway was activated and more PAs were converted to GABA. These results suggested that fresh-cut procedure can induce the accumulation of GABA through activating GABA shunt and polyamines degradation pathway. Besides, fresh-cut processing treatment did not have much adverse effect on the organoleptic quality of carrots.

SUPPLEMENTARY INFORMATION: The online version contains supplementary material available at (10.1007/s13197-021-05039-y).

* Title and MeSH Headings from MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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