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Chem Biodivers

Title:		Allelopathic potential of Rapanea umbellata leaf extracts
Author(s):		Novaes P; Imatomi M; Varela RM; Molinillo JM; Lacret R; Gualtieri SC; Macias FA;
Address:		"Departamento de Botanica, Universidade Federal de Sao Carlos, Rodovia Washington Luis, km 235, Sao Carlos - Sao Paulo, CEP 13565-905, Brazil"
Journal Title:		Chem Biodivers
Year:		2013
Volume:		10
Issue:		8
Page Number:		1539 - 1548
DOI:		10.1002/cbdv.201200367
ISSN/ISBN:		1612-1880 (Electronic) 1612-1872 (Linking)
Abstract:		"The stressful conditions associated with the Brazilian savanna (Cerrado) environment were supposed to favor higher levels of allelochemicals in Rapanea umbellata from this ecosystem. The allelopathic potential of R. umbellata leaf extracts was studied using the etiolated wheat coleoptile and standard phytotoxicity bioassays. The most active extract was selected to perform a bioassay-guided isolation, which allowed identifying lutein (1) and (-)-catechin (2) as potential allelochemicals. Finally, the general bioactivity of the two compounds was studied, which indicated that the presence of 1 might be part of the defense mechanisms of this plant"
Keywords:		Biological Assay Catechin/*chemistry/pharmacology Cotyledon/*drug effects/growth & development Inhibitory Concentration 50 Lutein/*chemistry/pharmacology Magnetic Resonance Spectroscopy Pheromones/chemistry/pharmacology Plant Extracts/*chemistry/*pharmaco;
Notes:		"MedlineNovaes, Paula Imatomi, Maristela Varela, Rosa M Molinillo, Jose M G Lacret, Rodney Gualtieri, Sonia C J Macias, Francisco A eng Research Support, Non-U.S. Gov't Switzerland 2013/08/14 Chem Biodivers. 2013 Aug; 10(8):1539-48. doi: 10.1002/cbdv.201200367"