Use este identificador para citar ou linkar para este item: http://repositorio.bc.ufg.br/handle/ri/16398
Tipo do documento: Artigo
Título: Influence of foliar nutrients on phenol levels in leaves of Eugenia uniflora
Autor: Santos, Rosa Maria dos
Fortes, Gilmara Aparecida Corrêa
Ferri, Pedro Henrique
Santos, Suzana da Costa
Abstract: Eugenia unifl ora L., Myrtaceae, leaves contain high amounts of phenolic compounds which are responsible for several pharmacological activities. In order to evaluate the phenolics seasonal variation leaves were analysed on a monthly basis during the period of two years for the contents of hydrolysable tannins, total phenols, fl avonoids, and nutrients (N, P, K, S, Ca, Mg, Mn, Zn, Cu, and Fe). Results were correlated with climate conditions (rainfall, humidity, and mean temperature) by Principal Component and Cluster Analysis which allowed four groups to be distinguished with respect to the age of the leaves and the content of some metals. Young leaves were characterised by high levels of Zn and nitrogen whereas old leaves contained high levels of Fe and calcium, and both groups had moderate amounts of phenolics. Adult leaves were divided in two groups and results revealed that while one group had the highest levels of all phenols and lowest amounts of Mn and Cu, the other showed opposite quantities. The Canonical Correlation Analysis confi rmed a highly signifi cant negative correlation between phenol contents and Mn and Cu. These facts suggested that fl avonoids and tannins production depends of the amounts of foliar nutrients, Cu and Mn in particular, which are cofactors of enzymes involved in phenol degradation and lignin biosynthesis. This knowledge can improve this specie cultivation in order to enhance the phenolic compounds concentration.
Palavras-chave: Ellagitannins
Eugenia uniflora
Flavonoids
Foliar mineral nutrientes
Pitangueira
País: Brasil
Unidade acadêmica: Instituto de Química - IQ (RG)
Citação: SANTOS, Rosa M. et al. Influence of foliar nutrients on phenol levels in leaves of Eugenia uniflora. Revista Brasileira de Farmacognosia, Curitiba, v. 21, n. 4, p. 581-586, July/Aug. 2011.
Tipo de acesso: Acesso Aberto
Identificador do documento: 10.1590/S0102-695X2011005000089
Identificador do documento: 10.1590/S0102-695X2011005000089
URI: http://repositorio.bc.ufg.br/handle/ri/16398
Data de publicação: Ago-2011
Aparece nas coleções:IQ - Artigos publicados em periódicos

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