Publications by authors named "Deibs Barbosa"

This protocol aims to demonstrate the surgical technique for transferring cloned pig embryos to the oviduct, a method widely used in the production of genetically modified pigs for biomedical research. Nine gilts underwent hormonal synchronization and laparotomy for the transfer of cloned embryos produced by somatic cell nuclear transfer (SCNT) at stages of up to 4 cells on day 2 to the oviduct. Gestational diagnosis was conducted via ultrasound examination 30 days post-transfer surgery.

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  • Microbial competition within plant tissues influences how pathogens like the Gram-negative bacterium causing Pierce's disease (PD) in grapevines perform, with various virulence factors being secreted to enhance pathogenicity.
  • This study utilizes metabolomics, specifically liquid chromatography-mass spectrometry (LC-MS), to analyze metabolites produced in interactions between the pathogen and an endophyte, revealing 121 metabolites linked to host adaptation and virulence.
  • Key findings indicate that the interaction alters amino acid ratios and downregulates compounds related to plant metabolism, suggesting that the endophyte helps suppress disease by modifying the pathogen's exometabolome and impacting plant immunity.
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is the causal agent of several plant diseases affecting fruit and nut crops. strain SR1.6/6 was isolated from and shown to promote plant growth by producing phytohormones, providing nutrients, inhibiting , and preventing Citrus Variegated Chlorosis.

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causes diseases in many plant species. Originally confined to the Americas, infecting mainly grapevine, citrus, and coffee, has spread to several plant species in Europe causing devastating diseases. Many pathogenicity and virulence factors have been identified, which enable the various strains to successfully colonize the xylem tissue and cause disease in specific plant hosts, but the mechanisms by which this happens have not been fully elucidated.

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The malaria parasite possesses a unique Acetyl-CoA Synthetase (PfACS), which provides acetyl moieties for different metabolic and regulatory cellular pathways. We characterized PfACS and studied its role focusing on epigenetic modifications using the gene family as reporter genes. For this, mutant lines to modulate plasmodial ACS expression by degron-mediated protein degradation and ribozyme-induced transcript decay were created.

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  • The increasing use of rubber has caused significant environmental issues due to its long decomposition time, sparking interest in microbial rubber degradation through bioremediation.
  • Research on the G. paraffinivorans MTZ041 isolate revealed the presence of the lcp gene, which helps initiate the breakdown of both natural and synthetic rubber.
  • Growth studies over 11 weeks showed that MTZ041 could thrive on rubber as a carbon source, highlighting its potential role in addressing rubber waste challenges through bioremediation.
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  • Hydrocarbons are significant environmental pollutants, and finding new microorganisms that can break them down is crucial for effective biodegradation.
  • Researchers isolated several bacterial strains from compost, specifically targeting those that can degrade n-hexadecane, identifying six isolates as members of the Gordonia genus.
  • Two selected strains, Gordonia paraffinivorans and Gordonia sihwensis, demonstrated impressive degradation rates and unique gene clusters involved in hydrocarbon degradation, highlighting their potential for biotransformation of harmful pollutants.
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Composting is a promising source of new organisms and thermostable enzymes that may be helpful in environmental management and industrial processes. Here we present results of metagenomic- and metatranscriptomic-based analyses of a large composting operation in the São Paulo Zoo Park. This composting exhibits a sustained thermophilic profile (50 °C to 75 °C), which seems to preclude fungal activity.

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Strains of Xylella fastidiosa constitute a complex group of bacteria that develop within the xylem of many plant hosts, causing diseases of significant economic importance, such as Pierce's disease in North American grapevines and citrus variegated chlorosis in Brazil. X. fastidiosa has also been obtained from other host plants, in direct correlation with the development of diseases, as in the case of coffee leaf scorch (CLS)--a disease with potential to cause severe economic losses to the Brazilian coffee industry.

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Here, we describe the draft genome sequences of two Xylella fastidiosa strains: Xf6c and Xf32, which have been obtained from infected coffee plants in Brazil, and are associated with the disease known as coffee leaf scorch (CLS).

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Composting operations are a rich source for prospection of biomass degradation enzymes. We have analyzed the microbiomes of two composting samples collected in a facility inside the São Paulo Zoo Park, in Brazil. All organic waste produced in the park is processed in this facility, at a rate of four tons/day.

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