• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 1
  • Tagged with
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Produção de substâncias bioativas por microrganismos endofíticos isolados do Cerrado de São Carlos-SP

Favoretto, Naira Beatriz 22 March 2010 (has links)
Made available in DSpace on 2016-08-17T18:39:34Z (GMT). No. of bitstreams: 1 3244.pdf: 1568153 bytes, checksum: ace013c6a0af80e75388b3ba5b97e8cf (MD5) Previous issue date: 2010-03-22 / The Brazilian tropical savannah occupies a large area in Brazil and includes a high variety of plant species. This diversity is an important source of endophytic microorganisms consisting mainly of bacteria and fungi that inhabit the interior of plants. Endophytes can produce bioactive metabolites that exhibit activities of biotechnological interest, such as antibacterial and antifungal action. The aim of this study was to isolate from Butia capitata var capitata (Coquinho-do-cerrado), Solanum lycocarpum (Lobeira), Stryphnodendron polyphyllu (Barbatimão), Miconia albicans (Quaresmeira-white) and Aegiphila lhotzliana (Tamanqueira), collected on Brazilian tropical savannah at São Carlos, SP, endophytic microorganisms with suggestive features of the genus Streptomyces. The samples were characterized through macroscopic, physiological, biochemical and morph-dying characteristics. The antagonistic potential was tested against Staphylococcus aureus ATCC 25923, Escherichia coli ATCC 25922, Serratia marcensis ITB 1475, Enterococcus faecalis ATCC 29212, Shigella sonnei ATCC 10231 and Candida albicans ATCC 10231. 26 samples of endophytic microorganisms were isolated and selected two, one from Butia capitata var capitata and another one from Miconia albicans. Both presented microbiological characteristics of Streptomyces. The microorganism isolated from Butia inhibited the growth of Staphylococcus aureus (13 mm) and Enterococcus faecalis (11 mm), and the one isolated from Miconia did not show bioactivity against the pathogens tested. / O Cerrado ocupa uma extensa área geográfica no Brasil comportando uma variedade de espécies de plantas. Essa diversidade é uma potencial fonte de microrganismos endofíticos constituídos principalmente por bactérias e fungos que habitam o interior das plantas. Os endofiticos podem produzir metabólitos secundários bioativos de interesse biotecnológico, como ação antibacteriana e antifúngica. Esse trabalho objetivou isolar das folhas das plantas Butia capitata var. capitata (Coquinhodo- cerrado), Solanum lycocarpum (Lobeira), Stryphnodendron polyphyllu (Barbatimão), Miconia albicans (Quaresmeira-branca) e Aegiphila lhotzliana (Tamanqueira), coletadas no cerrado de São Carlos, SP, microrganismos endofíticos produtores de substâncias bioativas com características sugestivas do gênero Streptomyces. As amostras foram identificadas através de características macroscópicas, fisiológicas, bioquímicas e morfo-tintoriais. O potencial antagônico foi testado contra Staphylococcus aureus ATCC 25923, Escherichia coli ATCC 25922, Serratia marcensis IAL 1475, Enterococcus faecalis ATCC 29212, Shigella sonnei ATCC 10231 e Candida albicans ATCC 10231. Vinte e seis amostras de endofíticos foram isoladas e duas selecionadas, provenientes de Butia capitata var capitata e de Miconia albicans. Ambas apresentaram características de Streptomyces. O endofítico isolado de Butia inibiu o crescimento de Staphylococcus aureus (13 mm) e de Enterococcus faecalis (11 mm), e o isolado de Miconia não apresentou bioatividade contra os microrganismos testados.

Page generated in 0.0883 seconds