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Chemical compositions of different cultivars of astringent persimmon (Diospyros kaki Thunb.) and the effects of maturity

떫은감(Diospyros kaki Thunb.) 품종 및 수확시기에 따른 영양 성분 변화

  • Received : 2019.03.04
  • Accepted : 2019.05.04
  • Published : 2019.06.30

Abstract

This study aimed to determine the chemical components of different cultivars (Gabjubaekmok, Sangjudungsi, and Godongsi) of persimmon (Diospyros kaki Thunb.) and the effects of maturity. The detected free sugars were fructose and glucose, and glucose levels tended to increase with maturity. Palmitic acid, oleic acid, linoleic acid and stearic acid, and potassium were major components. In the amino acid component analysis, the following were usually present in the following month: glutamic acid in Gabjubaekmok in July, lysine in Sangjudungsi in August, and threonine in Godongsi in October. Vitamin C tended to increase with aging, and fruit harvested in July had the highest total phenolic and flavonoid contents. In the metabolite analysis, there were significant differences among cultivars and with maturity. The major physiological compounds were analyzed using ultra performance liquid chromatography quadrupole time-of-flight tandem mass ($UPLC/Q-TOF/MS^2$) and were citric acid and gallic aicd. As maturity progressed, citric acid increased but gallic acid decreased.

Keywords

Astringent persimmon;Diospyros kaki Thunb.;Chemical composition;Maturity

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Fig. 1. Total phenolic contents (TPC) of three cultivars (A: Gabjubaekmok, B: Sangjudungsi, C: Godongsi) and harvest time (from July to October) of Diospyros kaki Thunb.

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Fig. 2. Total flavonoid contents (TFC) of three cultivars (A: Gabjubaekmok, B: Sangjudungsi, C: Godongsi) and harvest time (from July to October) of Diospyros kaki Thunb.

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Fig. 3. PLS-DA score scatter plot of Diospyros kaki Thunb. in three cultivars (Gabjubaekmok, Sangjudungsi, and Godongsi) (A) and cultivars harvest time (from July to October) (B).

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Fig. 4. Fold change of the citric acid contents of three cultivars (Gabjubaekmok (A), Sangjudungsi (B), and Godongsi (C)) and harvest time (From July to October) of Diospyros kaki Thunb.

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Fig. 5. Fold change of the gallic acid contents of three cultivars (Gabjubaekmok (A), Sangjudungsi (B), and Godongsi (C)) and harvest time (from July to October) of Diospyros kaki Thunb.

Table 1. Free sugar contents according to three cultivars (Gabjubaekmok, Sangjudungsi, and Godongsi) and 4 harvest time (from July to October) of Diospyros kaki Thunb.

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Table 2. Fatty acid contents according to three cultivars (Gabjubaekmok, Sangjudungsi, and Godongsi) and 4 harvest time (from July to October) of Diospyros kaki Thunb.

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Table 3. Mineral contents according to three cultivars (Gabjubaekmok, Sangjudungsi, and Godongsi) and 4 harvest time (from July to October) of Diospyros kaki Thunb.

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Table 4. Amino acid contents according to three cultivars (Gabjubaekmok, Sangjudungsi, and Godongsi) and 4 harvest time (from July to October) of Diospyros kaki Thunb.

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Table 5. Vitamin C contents according to three cultivars (Gabjubaekmok, Sangjudungsi, and Godongsi) and 4 harvest time (from July to October) of Diospyros kaki Thunb.

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Acknowledgement

Grant : 숙기에 따른 떫은감 인지기능 개선 기작 구명 연구

Supported by : 국립산림과학원