Submitted by Ricardo Cedraz Duque Moliterno (ricardo.moliterno@uefs.br) on 2018-01-26T22:34:50Z No. of bitstreams: 1 Tese Janaira - ULTIMA_VERS?O_TESE 11_12.pdf: 2389329 bytes, checksum: 317a53e7aedac40bb5150d1d444bfee3 (MD5) / Made available in DSpace on 2018-01-26T22:34:50Z (GMT). No. of bitstreams: 1 Tese Janaira - ULTIMA_VERS?O_TESE 11_12.pdf: 2389329 bytes, checksum: 317a53e7aedac40bb5150d1d444bfee3 (MD5) Previous issue date: 2016-03-21 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior - CAPES / Agave sisalana Perr., belongs to the Agavaceae family, and has a center of plant diversity in Mexico. In Brazil, the first seedlings were introduced in the Northeast, specifically in Bahia, in 1903. Sisal is a species known for its production of lignocellulosic fibers. The by-product, result of the defibration of sisal leaves, is an alternative source for biogas procdution, pharmaceutical input and as composite used in civil construction. In the leaf juice a high pharmacological potential such as inulin and hecogenin was quantified - precursor in the synthesis of corticosteroids. Some studies regarding sisal fibers and their input with pharmacological potential are described in the literature, however studies on the characterization of A. sisalana, in particular regards to morphological, biochemical and physical plant in nature is incipient. Therefore, the present work attempt to identify new applications for sisal by pre-breeding studies by morphological analysis of the plants and to study the morphology of their fibers, analyzing their microstructures, as well as mechanical fiber studies. Morphological analyzes showed that there is variability and heterogeneity among populations, and small plants has higher sugar content and maximum mechanical resistance of the fibers. Mechanical properties studied indicate that fibers vary within and among genotypes of different areas. Morphological and microstructural analyzes of fibers showed that evaluated areas, as well as the distinct regions of apex and base of fibers, have small differences in micro structural characteristics and that different edaphoclimatic conditions do not interfere in the chemical constitution, but intervene in the amount of organic compounds among individuals. / A Agave sisalana Perr., pertence ? fam?lia Agavaceae, e possui centro de diversidade o M?xico. No Brasil, as primeiras mudas foram introduzidas na Regi?o Nordeste, especificamente na Bahia, em 1903. O sisal ? uma esp?cie conhecida por sua produ??o de fibras lignocelul?sicas. O subproduto, resultado do desfibramento das folhas de sisal, ? uma fonte alternativa para a gera??o do biog?s, insumo farmac?utico e como comp?sito utilizado na constru??o civil. No suco das folhas foi quantificado um alto potencial farmacol?gico como a inulina e a hecogenina - precursor na s?ntese de corticoester?ides. Alguns estudos referentes ?s fibras de sisal e seu insumo com potencial farmacol?gico s?o descritos na literatura, entretanto estudos sobre a caracteriza??o da esp?cie A. sisalana, e em particular no que diz respeito as an?lises morfol?gicas, bioqu?micas e f?sicas da planta in natura s?o incipientes. Portanto, o presente trabalho procurou identificar novas aplica??es para o sisal, por meio de estudos de pr?-melhoramento atrav?s de an?lises morfol?gicas das plantas e, efetuar estudos da morfologia de suas fibras, analisando suas microestruturas, assim como realizar estudos mec?nicos da fibra. As an?lises morfol?gicas mostraram que existe variabilidade e heterogeneidade entre as popula??es avaliadas, e que plantas de baixa estatura possuem maior teor em a??cares e m?xima resist?ncia mec?nica das fibras. As propriedades mec?nicas estudadas indicaram que as fibras sofrem varia??o dentro e entre os gen?tipos de diferentes ?reas. As an?lises morfol?gicas e micro estrutural das fibras demonstraram que as ?reas avaliadas, assim como as distintas regi?es de ?pice e base das fibras, possuem pequenas diferen?as quanto ?s caracter?sticas micro estruturais e que distintas condi??es edafoclim?ticas n?o interferem na constitui??o qu?mica, mas interv?m na quantidade dos compostos org?nicos entre os indiv?duos.