Journal
PHYTOCHEMISTRY
Volume 110, Issue -, Pages 72-82Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.phytochem.2014.11.005
Keywords
Alternanthera brasiliana; Amaranthaceae; Antibiotics; Fatty acids; Oxylipins; LC-MS; Endophytes; Bacillus
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Funding
- Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP)
- Rede SISBIOTA-Brasil
- Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq)
- Coordenacao de Aperfeicoamento de Pessoal de Ensino Superior (CAPES)
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Bioassay-guided fractionation of Alternanthera brasiliana stem extracts resulted in the isolation of an anti-biotically active fraction. Five human pathogenic bacteria were used to guide the fractionation process for the isolation of antimicrobial compounds. Finally, 17 linoleate oxylipins were identified by LC-MS/MS and NMR spectroscopy. Five of the isolated compounds present in A. brasiliana tissues were also detected to be synthesized by endophytic bacteria of the genus Bacillus that were isolated from A. brasiliana. It is speculated that the antibiotic oxylipins from A. brasiliana might derive from bacteria and be involved in an ecological relationship between this plant and its endophytes. (C) 2014 Elsevier Ltd. All rights reserved.
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