Author(s):

Irvila Ricarte De O Maia, Maria Teresa Salles Trevisan, Maria Goretti De V Silva, Andrea Breuer and Robert W Owen

Abstract:
The concentration of total polyphenolic compounds and the proportion of flavonoids and tannins in four medicinal plants of Senna species (S. splendida, S. georgica, S. macranthera var pudibunda and S. gardneri) of the species Senna Mill. were determined. On average, the higher amounts (on a dry weight basis) of polyphenolic compounds were detected in the botanical parts of S. gardneri (leaves and root = 425 g/kg) followed by S. macranthera (leaves, fruits, bark and root = 357 g/kg), S. georgica (leaves, bark and root = 182 g/kg) and S. splendida (leaves, flowers, bark and root = 145 g/kg). Tannins represented the major polyphenolic compounds at 80, 75, 55 and 40 % in S. gardneri, S. macranthera, S. splendida, and S. georgica respectively. The antioxidant capacities of S. gardneri and S. macranthera extracts were superior to those of S. georgica and S. splendida reflecting their higher concentration of total polyphenolics. Word count = 149.

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