GAE/g (leaf extract) to 48.86 μg GAE (stem extract)/g
dry weight basis (Table 1). Phenolic compounds are
used by plants as defense mechanisms to counteract
reactive oxygen species (ROS) in order to survive and
prevent molecular damage and also to hinder he action
of microorganisms, insects, and herbivores (Vaya et al.,
1997). Results show a positive correlation coefficient
between the total phenolic content and DPPH assay of
plants extracts. In this study, it seemed that, the higher
total phenolic content of plants extracts resulted in
higher antioxidant activity as similarly reported by Cai
and co-workers (2004).