All ethanol (EtOH) and ethyl acetate (EtOAc) extracts
exhibited low DPPH radical scavenging activity (10%–23%) at the tested concentration (500, 1,000
and 2,000 μg/mL) whereas only the EtOH extract of Z. mays var. intendata exhibited SO scavenging
activity (25%) at 200 μg/mL. The highest iron chelating capacity was for EtOH extract of Z. mays var.
indurata (63%) at 500, 1,000 and 2,000 μg/mL