Genomic variability of Pantoea ananatis in maize white spot lesions assessed by AFLP markers.

Measures to control maize white spot (MWS) caused by Pantoea ananatis are preferentially based on resistant cultivars. A lack of knowledge on the genetic variability of pathogens could interfere with the development and utilization of controlling strategies in this pathosystem. The main goals of this study were to investigate the genetic variability of 90 P. ananatis isolates from three different eco-geographical regions of Brazil by amplified fragment length polymorphism (AFLP), and to determine the presence of a universal P. ananatis plasmid in isolates from tropical Brazil. Analysis of genetic similarity by AFLP allowed us to categorize the 90 isolates into two groups. However, no correlation between the collecting sites and genetic groupings was observed. The polymorphism percentage found in P. ananatis ranged between 24.64 and 92.46%, and genetic diversity was calculated to be 0.07-0.09. The analysis of molecular variance showed that 99.18% of genetic variability was within the populations, providing evidence that evolutionary forces were acting on these populations. All P. ananatis isolates showed the P. ananatis universal plasmid (280 or 352 kb). This is the first report on the presence of a universal P. ananatis plasmid from MWS lesions in the tropical area

Sensitivity of Cercospora spp. from soybean to quinone outside inhibitors and methyl benzimidazole carbamate fungicides in Brazil.

Artigo de acesso aberto

On the selection of AGN neutrino source candidates for a source stacking analysis with neutrino telescopes

The sensitivity of a search for sources of TeV neutrinos can be improved by grouping potential sources together into generic classes in a procedure that is known as source stacking. In this paper, we define catalogs of Active Galactic Nuclei (AGN) and use them to perform a source stacking analysis. The grouping of AGN into classes is done in two steps: first, AGN classes are defined, then, sources to be stacked are selected assuming that a potential neutrino flux is linearly correlated with the photon luminosity in a certain energy band (radio, IR, optical, keV, GeV, TeV). Lacking any secure detailed knowledge on neutrino production in AGN, this correlation is motivated by hadronic AGN models, as briefly reviewed in this paper. The source stacking search for neutrinos from generic AGN classes is illustrated using the data collected by the AMANDA-II high energy neutrino detector during the year 2000. No significant excess for any of the suggested groups was found.Comment: 43 pages, 12 figures, accepted by Astroparticle Physic

Crescimento micelial radial e esporulação de isolados de Corynespora cassiicola.

Made available in DSpace on 2019-01-28T23:41:43Z (GMT). No. of bitstreams: 1 MelloCrescimento.pdf: 710300 bytes, checksum: 44db635c57afa552fa3512a9ebdb32af (MD5) Previous issue date: 2019-01-28bitstream/item/191373/1/Mello-Crescimento.pdfTítulo em inglês: Radial mycelial growth and sporulation of Corynespora cassiicola isolates

Complete genome sequence of Bacillus velezensis LABIM40, an effective antagonist of fungal plant pathogens.

Made available in DSpace on 2019-01-09T23:50:44Z (GMT). No. of bitstreams: 1 Baptista2p.pdf: 151278 bytes, checksum: 58e6b354ea922d395b284330eac4c58e (MD5) Previous issue date: 2019-01-08bitstream/item/189986/1/Baptista-2-p.pd