Caracteriza??o estrutural da mat?ria org?nica do solo, glomalina e subst?ncias h?micas de diferentes ambientes e origens

• Ano de defesa: 2016
• Autor(a) principal: Souza, Luiz Gilberto Ambr?sio de
• Orientador(a): Berbara, Ricardo Luiz Louro
• Banca de defesa: Berbara, Ricardo Luiz Louro, Ara?jo, Ednaldo da Silva, Pereira, Marcos Gervasio
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal Rural do Rio de Janeiro
• Programa de Pós-Graduação: Programa de P?s-Gradua??o em Agronomia - Ci?ncia do Solo
• Departamento: Instituto de Agronomia
• País: Brasil
• Palavras-chave em Português: Subst?ncias h?micas; Glicoprote?nas; Quimiometria
• Palavras-chave em Inglês: Humic substances; Glycoproteins; Chemometrics
• Área do conhecimento CNPq: Agronomia
• Link de acesso: https://tede.ufrrj.br/jspui/handle/jspui/1907

Glomalin is regarded as a hydrophobic, heat-stable and recalcitrant glycoprotein produced by arbuscular mycorrhizal fungi (AMF). Such characteristics possibly result in high amounts of this protein in the soils, as well as a reduced rate of decomposition, and it is considered an important fraction of soil organic matter. Humic Substances (HS) have been recognized for a long time as the organic component most widely distributed on the planet, present both in terrestrial and aquatic environments. They are formed from chemical and biological degradation of residues from plants, animal and microbial activity. Although with some progress on structural aspects of glomalin and humic substances, there are few studies that describe their structural differences using a spectroscopic and chemometric approach. To search for answers for these questions, having as a reference the existing environmental and ecological relationships, this study aimed to confirm the structural relationship (differences and similarities) between the glomalin and humic substances obtained from different sources, through the isolation and purification of soil protein fractions related to glomalin (Glo), and the humic substances (HSs) fractions from different environments and composted materials; characterizing glomalin and humic substances obtained by chemical, physical and spectroscopic techniques (elemental composition, UV-vis, FTIR, 13 C CP-MAS RMN, EMS), and by using chemometric techniques (Unscrambler? X 10.3).