Insights into an endemic medicinal plant species of Madagascar: the case of famelona (Chrysophyllum boivinianum (Pierre) Baehni)
Chrysophyllum boivinianum (Sapotaceae family) is an endemic plant of Madagascar (famelona as vernacular name) and Comoros. Its leaves are used in traditional medicine to treat fever, muscle pain and scorpion bites as well as to heal wounds. C. boivinianum is widely used by the local population in Madagascar to treat many diseases. The strong pressure due to its intensive over-exploitation, poor knowledge of its genetic resources and climate change are threatening this species, as well as forest ecosystems from which it depends. Thus, a deeper assessment of its valorisation strategy is becoming ever more crucial. The objective of this preliminary study was to identify and quantify the main phenolic and organic compounds in the leaves and stems of C. boivinianum in relation to their antioxidant activity. Solvents composed of methanol, water and chloridric acid were used for leaf and stem extractions. The two extracts were then compared with leaf infusions and stem decoctions by spectrophotometric and chromatographic analysis in order to determine phytochemical composition and antioxidant activity. The results showed that the leaf extracts contained the highest amount of total polyphenolic compounds (TPC) (805.16±1.08 mgGAE 100 g‑1 DW), followed by leaf infusions at 477.87±38.49 mgGAE 100 g‑1 DW. The leaf infusions showed much higher antioxidant activity (49.67±0.45 mmol Fe2+ kg‑1 DW) than did leaf extracts (27.60±0.32 mmol Fe2+ kg‑1 DW). This activity was influenced by high amounts of chlorogenic acid and caffeic acid, at 217.08±2.89 and 13.02±0.15 mg 100 g‑1 DW, respectively. The leaf infusions were also rich in gallic acid (15.19±1.63 mg 100 g‑1 DW).The leaves of C. boivinianum showed a higher content of bioactive compounds than the stems, and the infusions represented the best method for extracting biomolecules with high amounts of healthy properties and antioxidant activity. This activity was influenced by the high rates of polyphenols in the leaves.
Rakotoniaina, E., Donno, D., Randriamampionona, D., Andriamaniraka, H., Soifoini, T., Ramonta, I., Solo, N., Torti, V., Giacoma, C. and Beccaro, G.L. (2020). Insights into an endemic medicinal plant species of Madagascar: the case of famelona (Chrysophyllum boivinianum (Pierre) Baehni). Acta Hortic. 1267, 85-90
antioxidant activity, biodiversity, phenolic acids, organic acids