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

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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.

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Acknowledgements

This study was supported by National Natural Science Foundation of China (31972092), Public Welfare Applied Research Project of Zhejiang Province (LGN19C200012) and Ningbo City (2019C10086), National Key Research and Development Program of China (2018YFD0401304).

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Correspondence to Hongfei Wang or Feng Xu.

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Hou, Y., Ren, H., Wang, K. et al. Influence of fresh-cut process on γ-aminobutyric acid (GABA) metabolism and sensory properties in carrot. J Food Sci Technol 59, 552–561 (2022). https://doi.org/10.1007/s13197-021-05039-y

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  • DOI: https://doi.org/10.1007/s13197-021-05039-y

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