a Values are mean ± standard deviation of three replicates. Values within each group in each column having the same letter (a, b, c and d) are not significantly different
(p 6 0.05). b Yield of methanolic extracts expressed as g/100 g. c TPC was expressed as mg of ferulic acid equivalents/100 g. d TFC and PAC were expressed as mg of catechin equivalents/100 g.