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TEMPORAL VARIATION OF THE TOTAL PHENOLIC COMPOUNDS CONCENTRATION IN Vochysia divergens Pohl. (VOCHYSIACEAE) LEAVES IN THE BRAZILIAN PANTANAL

ABSTRACT The total phenol concentration present in Vochysia divergens Pohl. (Vochysiaceae) leaves in the Pantanal was analyzed. Work was carried out between September/2012 and June/2013 which is made up by the dry season (September/2012), the beginning of the rising water (December/2012), the high w...

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Bibliographic Details
Published in:Revista árvore 2017-01, Vol.41 (3)
Main Authors: Uriu, Deise Martins, Godoy, Bruna Serpa de Almeida, Battirola, Leandro Dênis, Andrighetti, Carla Regina, Marques, Marinêz Isaac, Valladao, Denia Mendes de Sousa
Format: Article
Language:English
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Summary:ABSTRACT The total phenol concentration present in Vochysia divergens Pohl. (Vochysiaceae) leaves in the Pantanal was analyzed. Work was carried out between September/2012 and June/2013 which is made up by the dry season (September/2012), the beginning of the rising water (December/2012), the high water (March/2013) followed by the receding water period (June/2013). For the purpose of the research fifteen trees were selected, five from each sample area. The phenolic content in the leaves was obtained from the samples which were dried, steeped with ethanol: water and centrifuged. The extract was used to determine the concentration of total phenols using the Folin-Ciocalteu spectrometric method. There was no difference among the sampling areas; however the values were different in relation to seasonal periods. The lowest concentration was recorded in the dry season (young leaves) increasing gradually at the beginning of the rising water, with higher levels at the end of high water and receding water season. The highest concentration of phenols occurred during the receding water period (end of the life cycle of V. divergens leaves), followed by high and rising water periods. The increase in phenol concentration is associated with the Pantanal flood cycle, and related to the phenology of the V. divergens leaves. RESUMO Analisou-se a concentração de fenóis totais presentes nas folhas de Vochysia divergens Pohl. (Vochysiaceae) na região norte do Pantanal, coletadas entre setembro de 2012 e junho de 2013, compreendendo o período de seca (setembro/2012), o começo do período de inundação (dezembro/2012), período de cheia (março/2013) seguido pela vazante (junho/2013). Para a coleta foram selecionadas 15 árvores, cinco em cada área amostral. A concentração de fenóis nas folhas foi obtida com as amostras secas à 40ºC, maceradas com etanol: água e centrifugada. O extrato foi usado para determinação da concentração de fenóis totais utilizando-se o método espectrométrico de Folin-Ciocalteu. Não houve diferença entre as áreas amostrais, entretanto os valores foram diferentes em relação aos períodos sazonais. A menor concentração foi registrada no período da seca (folhas jovens) aumentando gradativamente no início do período de enchente com maiores níveis no final do período de inundação. A maior concentração de fenóis ocorreu durante a vazante (final do ciclo de vida das folhas de V. divergens), seguida pela cheia e enchente. O aumento na concentração de fenóis, provavel
ISSN:1806-9088
1806-9088
DOI:10.1590/1806-90882017000300016