Journal of Food Quality / 2017 / Article / Tab 5

Research Article

Variation in Flavonoid Composition and Radical-Scavenging Activity in Ginkgo biloba L. due to the Growth Location and Time of Harvest

Table 5

Comparison of individual compounds in G. biloba leaf extracts.

Sample number Growth location Time of harvestContent (mg g−1)
QuercetinKaempferolIsorhamnetin

1NorthJune2.22 ± 0.040.76 ± 0.030.10 ± 0.01
July5.98 ± 0.101.94 ± 0.070.32 ± 0.03
August5.22 ± 0.091.67 ± 0.050.22 ± 0.02
September5.35 ± 0.091.63 ± 0.060.16 ± 0.03
October4.07 ± 0.071.20 ± 0.040.11 ± 0.02

2WestJune3.40 ± 0.290.73 ± 0.010.25 ± 0.01
July13.27 ± 0.592.19 ± 0.141.03 ± 0.15
August9.48 ± 2.211.83 ± 0.220.82 ± 0.11
September7.52 ± 1.641.79 ± 0.020.41 ± 0.11
October7.53 ± 2.851.39 ± 0.410.46 ± 0.14

3CentralJune2.12 ± 0.040.84 ± 0.030.22 ± 0.01
July4.65 ± 0.081.50 ± 0.050.43 ± 0.02
August5.82 ± 0.101.64 ± 0.050.68 ± 0.03
September3.58 ± 0.061.40 ± 0.040.37 ± 0.01
October3.71 ± 0.061.28 ± 0.040.28 ± 0.01

4SouthwestJune2.56 ± 0.051.00 ± 0.040.18 ± 0.01
July7.42 ± 0.132.81 ± 0.100.44 ± 0.01
August4.98 ± 0.092.06 ± 0.070.38 ± 0.01
September6.44 ± 0.112.36 ± 0.080.19 ± 0.03
October3.13 ± 0.051.40 ± 0.050.30 ± 0.01

5SouthJune2.84 ± 0.050.62 ± 0.020.16 ± 0.02
July5.89 ± 0.101.46 ± 0.050.39 ± 0.04
August9.10 ± 0.161.74 ± 0.060.56 ± 0.07
September7.91 ± 0.141.51 ± 0.050.29 ± 0.06
October2.97 ± 0.050.85 ± 0.030.11 ± 0.02

Notes. () Different letters in columns show significant difference between the time of harvest for each compound and growth location based on Tukey’s HSD test at ; () results are presented as the mean ± standard error () of the recorded concentrations.

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