Cuticular n-alkane in leaves of seven Neotropical species of the family Lecythidaceae: a contribution to chemotaxonomy

ABSTRACT Biosynthesized from very long-chain fatty acid wax precursors, n-alkanes make a valuable contribution to the taxonomy of plants. The alkane components of foliar epicuticles of seven Neotropical species of Lecythidaceae were investigated: Bertholletia excelsa, Cariniana legalis, Couroupita guianensis, Eschweilera alvimii, Eschweilera ovata, Gustavia augusta and Lecythis pisonis. Specimens were collected in the metropolitan area of Recife, Pernambuco, and their n-alkane fractions were analyzed by gas chromatography. The chemical relationships among the species were then evaluated using cophenetic correlation and UPGMA. Among the seven species, a total of 15 n-alkanes, with 21-35 carbon atoms, were identified and formed a consistent group of B. excelsa, C. guianensis, E. ovata, G. augusta, and L. pisonis with n-C31. The greatest similarities were found between B. excelsa and L. pisonis, and between C. guianensis and G. augusta. Nevertheless, a phenetic analysis based on a larger number of species is needed to better understand the chemotaxonomic value of epicuticular n-alkanes within the Lecythidaceae.

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Bibliographic Details
Main Authors: Silva,Rejane Maria da, Ribeiro,Rayane de Tasso Moreira, Souza,Renata Janaína Carvalho de, Oliveira,Antônio Fernando Morais de, Silva,Suzene Izídio da, Gallão,Maria Izabel
Format: Digital revista
Language:English
Published: Sociedade Botânica do Brasil 2017
Online Access:http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062017000100137
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