Effect of Harvest Maturity on Potassium Value Secondary Metabolites and Antioxidant Activity of Orthosiphon aristatus (Blume) Miq.
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Abstract
This research investigated the effects of four stages of harvest maturity (30, 60, 90 and 120 days after planting) on potassium, secondary metabolites, and antioxidant activity of Orthosiphon aristatus (Blume) Miq. The experiment was arranged in a complete randomized design (CRD). Results showed that there were significant different harvesting maturities. The highest potassium content (5.02 g/100 g DW) was harvesting time at 30 days. The caffeic acid and rosmarinic acid (1.47 and 26.24 mg/kg DW) were highest with harvesting time at 60 days. In addition, the phenolic content and DPPH radical scavenging capacity (50.48 mgGAE/100 g DW and IC 50 being equal to 0.68 mg/mL) were found highest at harvesting time in 120 days after planting. Therefore, based on the findings, harvesting time at 120 days is recommended to farmers for optimum constituents of Orthosiphon aristatus (Blume) Miq. production.
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