Doutorado em Química (IQ)
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Navegando Doutorado em Química (IQ) por Por Área do CNPQ "CNPQ::CIENCIAS EXATAS E DA TERRA::QUIMICA::QUIMICA ORGANICA::QUIMICA DOS PRODUTOS NATURAIS"
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Item Variabilidade química dos óleos essenciais e do teor de fenóis em folhas e frutos da jabuticabeira (Myrciaria cauliflora)(Universidade Federal de Goiás, 2012-06-29) DUARTE, Alessandra Rodrigues; FERRI, Pedro Henrique; http://lattes.cnpq.br/2129799749473005Foliar contents of total phenols and tannins and the essential oil composition of Myrciaria cauliflora populations cultivated in six sampling sites have shown the presence of four clusters related to soil types and foliar nutrients. Cluster I included samples which originated from sandy soil (S1) with the highest and lowest percentages of γ-eudesmol (11.55%) and germacrene D (20.48%), respectively, as well as high total phenol (136.68 mg/g) and tannin (60.72 mg/g) contents. Cluster II, rich in elemol (4.61%), included all the samples cultivated from clay sand loam soils (S2, S3, and S6), whereas clay soils S4 (cluster III) and S5 (cluster IV) had the highest amounts of germacrene D (III: 27.20%; IV: 26.83%) and the lowest levels of elemol (2.12%; 2.55%), total phenols (79.69 and 111.77 mg/g), and tannins (34.04 and 44.51 mg/g). Canonical redundancy analysis (RDA) revealed the relationship between chemical balances in the soil and leaf nutrients in different clusters. Chemovariations may be environmentally determined. Additionally, essential oil chemical composition and phenolics (total phenols, tannins, anthocyanins), reducing sugar and fruit acidity contents of Myrciaria cauliflora were obtained from same cultivated populations. RDA and discriminant analyses revealed four clusters of samples based on contents of α-copaene, tannins, reducing sugar and fruit acidity as predictor variables. The total variation partition performed by partial RDAs showed a strong influence of edaphic factors on phenolics, reducing sugar and fruit acidity data set. However, the polymorphism of essential oils may be genetically determined. Spatial influence on chemovariations was significant for all constituents, but less pronounced for essential oil data.