Foliar cuticular alkanes of Camarea (Malpighiaceae) and their taxonomic significance |
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Authors: | Lucimar B Motta Antonio SalatinoMaria LF Salatino |
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Institution: | Instituto de Biociências, Universidade de São Paulo, C. Postal 11461, 05422-970 São Paulo, SP, Brazil |
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Abstract: | Camarea is a South-American endemic genus comprising eight species. In the present work n-alkanes from foliar cuticular waxes of 23 specimens, representing seven species of Camarea were analyzed, aiming at establishing interspecific affinities and evaluating the usefulness of n-alkane distribution as species characteristic. The sampling included also specimens of Peixotoa reticulata and Janusia guaranitica (both Malpighiaceae). The results were used to obtain a phenogram indicating chemical affinities between species. The results are in agreement with morphological similarities among some Camarea species. Intraspecific variability was small, suggesting that n-alkane distribution may be useful for species characterization and establishment of links among Camarea species. The results support the recognition of Camarea triphylla as a synonym of Camarea axillaris and are not coherent with a hybrid condition of a population exhibiting morphological characteristics combining Camarea affinis and Camarea hirsuta, suggesting instead that the individuals analyzed belong either to Camarea hirsuta or a close species. Distribution of n-alkanes is inadequate to distinguish among Malpighiaceae genera: P. reticulata has n-alkane distribution similar to several Camarea species. |
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Keywords: | Camarea Malpighiaceae Cuticular waxes n-Alkanes Chemotaxonomy |
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