Abstract Detail

Ethnobotany

Nantenaina, Rindra Harilanto [1], Roger, Edmond [1], Rafidison, Verohanitra [1].

Characterizing the optimal conditions for the production of Darutoside in Sigesbeckia orientalis.

Sigesbeckia orientalis (Asteraceae), a medicinal plant known for its wound-healing property, is highly demanded in cosmetic industries because of the presence of "Darutoside", an important active compound. This study aims in determining what factors influence the production of Darutoside in S. orientalis in the tropical ecosystems of Madagascar. To do this, we extracted this compound from three different organs (leaves, seeds and whole plants) collected at different time periods during the rainy season (at the beginning, in the highest peak and at the end) and dried using three different methods (sun-, shade- and freeze-drying). We also analyzed how the chemical composition of the soil in the field where S. orientalis is naturally found, influence the production of Darutoside. Our results show that Sigesbeckia leaves, collected at the end of the rainy season and dried in the shade, have the highest content of Darutoside. This content is enhanced for individuals found on a strongly acid soil, with a very sandy silt texture, rich in Carbon, Nitrogen, Potassium and Phosphorus, and for those in close proximity to a river. This research highlights the importance of taking into account both environmental conditions and biological factors in the harvest of Sigesbeckia orientalis for an optimal production of Darutoside. However, given that the production of active compound in medicinal plants may vary sporadically, periodic monitoring is necessary for a better understanding of the production of this important active compound.

1 - University of Antananarivo, Department of Plant Biology and Ecology, BP 906 Ankatso, Antananarivo, 101, Madagascar

Keywords:
medicinal plant
Madagascar
Asteraceae
wound-healing compound.

Presentation Type: Poster
Session: P, Ethnobotany
Location: Exhibit Hall/Omni Hotel
Date: Monday, June 26th, 2017
Time: 5:30 PM This poster will be presented at 6:15 pm. The Poster Session runs from 5:30 pm to 7:00 pm. Posters with odd poster numbers are presented at 5:30 pm, and posters with even poster numbers are presented at 6:15 pm.
Number: PET002
Abstract ID:68
Candidate for Awards:Economic Botany Section best poster