Análise fitoquímica sazonal e cultura de tecidos in vitro de Duroia macrophylla Huber
The Amazon species Duroia macrophylla Huber (Rubiaceae) produces triterpenes and alkaloids with activity against Mycobacterium tuberculosis and an indole alkaloid active against tumoral cell lines. Previous studies showed that different plant extracts had difference on the chemical composition. So,...
| Autor principal: | Zanca, Sabrina Schumacker |
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| Grau: | Dissertação |
| Idioma: | por |
| Publicado em: |
Instituto Nacional de Pesquisas da Amazônia - INPA
2020
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| Acesso em linha: |
https://repositorio.inpa.gov.br/handle/1/12732 http://lattes.cnpq.br/4582042932572672 |
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The Amazon species Duroia macrophylla Huber (Rubiaceae) produces triterpenes and alkaloids with activity against Mycobacterium tuberculosis and an indole alkaloid active against tumoral cell lines. Previous studies showed that different plant extracts had difference on the chemical composition. So, the present study aim to assess the seasonal production of secondary metabolites in Duroia macrophylla extracts, in two specimens for one year. Also, callus in vitro were obtained for phytochemical extraction and secondary metabolites production analysis. For the two plants phytochemical analysis, leaves were collected monthly from April/2013 to March/2014. Plant material was grounded and extracted with hexane and methanol, with ultrasound bath. The concentrated extracts were analyzed by thin layer chromatography (TLC) and 1H-nuclear magnetic resonance (1H-NMR). The NMR spectra were compared by principal component analysis (PCA). The in vitro tissue cultures were established from young leaves with 50% of asepsis after several assays and with different immersion times of the chemical reagents: 70% etanol, 2% sodium hypochlorite and biocide solution. In vitro explants were induced to callus formation process by adding the growth regulators kinetin and 2,4-D, on Murashige & Skoog media, and then extracted with hexane and methanol. The production of secondary metabolites was analysed by TLC and 1H-NMR. All hexane and methanol extracts of two Duroia macrophylla individuals showed evidence of the presence of alkaloids and terpenes during a year. The PCA analysis showed seasonal variation on the chemical composition of the hexane extracts of Duroia macrophylla’s leaves, where the production of alkaloids increased during the rainy season. Regarding the methanol extracts of the leaves, the extract from November showed a lower alkaloid content. Being November the flowering species period, we can infer that the plant is redirecting its biosynthetic route for the production of less polar indole alkaloids or other metabolites. D. macrophylla callus extracts showed terpenes but not alkaloids production, and showed no antioxidant, toxic and antibacterial activities in the performed assays. |