Aims: To determine the influence of location, seasonal variation and solvent system in
production of phytochemicals and antioxidants from ginkgo leaves.
Methods: Total phenolic and flavonoid contents and antioxidant activity in ginkgo leaf
extracts were estimated spectrophotometrically. Factorial analysis was performed to
correlate the influence of location, season and solvent on production of phytochemicals
and antioxidants.
Results: Total phenolic and flavonoid contents as well as the antioxidants were estimated
maximum in autumn. Among solvents, acetone/water extracts gave best results for
phenolic and flavonoid contents while methanolic extracts were best for antioxidants.
Phenolic content, the predominant indicator of phytochemicals, showed significant correlation
with antioxidant activity.
Conclusion: Factorial analysis among location, season and solvent with respect to the
phytochemicals and antioxidants, was found to be statistically significant. Presence of
phytochemicals along with the protective feature in the form of antioxidants is indicative
of the importance of this species in pharmacological industry.
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