RESUMO O cementoblastoma é um tumor odontogênico mesenquimal benigno, de crescimento lento e ilimitado. Devido à sua raridade, relatamos o caso de uma mulher de 24 anos, que apresentou queixas álgicas e aumento de volume na região mandibular esquerda. Os exames de imagem identificaram lesão hiperdensa com halo hipodenso, associada às raízes dos elementos 35, 36 e 37. O exame histopatológico foi importante para o diagnóstico de cementoblastoma. O tratamento proposto consistiu na enucleação da massa tumoral junto à exodontia dos dentes envolvidos e à osteotomia do remanescente ósseo. A paciente encontra-se em acompanhamento há um ano, sem sinais de recidiva.

ABSTRACT Cementoblastoma is a benign, slow-growing, and unlimited mesenchymal dental tumor. Due to its rarity, we aimed to report the case of a 24-year-old female patient who presented pain complaints and increased volume in the left mandibular region. Imaging tests showed a hyperdense lesion with hypodense halo, associated with the roots of elements 35, 36, and 37. Histopathology revealed diagnosis of cementoblastoma. The proposed treatment consisted of the enucleation of the tumor mass together with the exodontia of the teeth involved and osteotomy of the bone remnant. The patient has been under follow-up for one year with no signs of recurrence.

RESUMEN El cementoblastoma es un tumor odontogénico benigno mesenquimático de crecimiento lento e ilimitado. Debido a su raridad, reportamos el caso de una paciente femenina de 24 años, que presentó quejas de dolor y aumento de volumen en región mandibular izquierda. En las pruebas de imagen se identificó una lesión hiperdensa con halo hipodenso, asociada a las raíces de las piezas dentales 35, 36 y 37. El examen histopatológico fue importante para el diagnóstico de cementoblastoma. El tratamiento propuesto consistió en la enucleación de la masa tumoral, la exodoncia de los dientes involucrados y la osteotomía del remanente óseo. La paciente se encuentra en seguimiento hace un año, sin signos de recaída.

Abstract In the pursuit of sustainable agriculture, bioinoculants usage as providers of a crop's needs is a method to limit environmental damage. In this study, a collection of cultivable putative plant growth promoting (PGP) bacteria associated with wheat crops was obtained and this bacterial sample was characterized in relation to the functional diversity of certain PGP features. The isolates were obtained through classical cultivation methods, identified by partial 16S rRNA gene sequencing and characterized for PGP traits of interest. Functional diversity characterization was performed using Categorical Principal Component Analysis (CatPCA) and Multiple Correspondence Analysis (MCA). The most abundant genera found among the 346 isolates were Pseudomonas, Burkholderia, and Enterobacter. Occurrence of PGP traits was affected by genus, niche, and sampling site. A large number of genera grouped together with the ability to produce indolic compounds; phosphate solubilization and siderophores production formed a second group related to fewer genera, in which the genus Burkholderia has a great importance. The results obtained may help future studies aiming prospection of putative plant growth promoting bacteria regarding the desired organism and PGP trait.

The aim of this study was to evaluate the impact of different grazing pressures on the activity and diversity of soil bacteria. We performed a long-term experiment in Eldorado do Sul, southern Brazil, that assessed three levels of grazing pressure: high pressure (HP), with 4% herbage allowance (HA), moderate pressure (MP), with 12% HA, and low pressure (LP), with 16% HA. Two reference areas were also assessed, one of never-grazed native vegetation (NG) and another of regenerated vegetation after two years of grazing (RG). Soil samples were evaluated for microbial biomass and enzymatic (β-glucosidase, arylsulfatase and urease) activities. The structure of the bacterial community and the population of diazotrophic bacteria were evaluated by RFLP of the 16S rRNA and nifH genes, respectively. The diversity of diazotrophic bacteria was assessed by partial sequencing of the 16S rDNA gene. The presence of grazing animals increased soil microbial biomass in MP and HP. The structures of the bacterial community and the populations of diazotrophic bacteria were altered by the different grazing managements, with a greater diversity of diazotrophic bacteria in the LP treatment. Based on the characteristics evaluated, the MP treatment was the most appropriate for animal production and conservation of the Pampa biome.

A produção de tomates no Estado do RS ocupa um importante papel sócio-econômico, que pode ser constatado pelo crescimento do cultivo dessa hortaliça em ambiente protegido. Essa técnica permite a produção de tomates em período de entressafra; no entanto, ocorrem também condições favoráveis para o desenvolvimento de doenças fúngicas como o mofo cinzento provocado por Botrytis cinerea. O surgimento de raças de patógenos resistentes a fungicidas químicos vem fazendo com que o controle biológico torne-se uma alternativa necessária. Neste trabalho foi realizada seleção in vitro de 24 isolados do fungo Trichoderma harzianum e 12 de Gliocladium viride que inibiram o desenvolvimento do patógeno B. cinerea. Foram selecionados dois isolados (TRIC-30 e GLIO-10) para serem testados em experimentos em condições de campo com tomates cultivados sob ambiente protegido, nos quais a pulverização foliar semanal com uma suspensão com 2x10(7) conídios mL-1 reduziu significativamente a incidência do mofo cinzento, enquanto a aplicação dos antagonistas nas sementes, no substrato e na cova, no momento do plantio, não reduziu a incidência do patógeno.

The production of tomato in the State of Rio Grande do Sul performs an important economical and social role that can be evidenced by the increase in cultivation of this vegetable in protected environment. This practice allows the production of tomato during the off-season periods. However, it can also promote favorable conditions to the development of gray mold caused by Botrytis cinerea, and the arising of pathogen races resistant to fungicides is turning biological control into a necessary alternative. In the present work, an in vitro selection among 24 isolates of the fungus Trichoderma harzianum and 12 of Gliocladium viride that inhibited the development of the pathogen B. cinerea was carried out. Two isolates (TRIC-30 e GLIO-10) were selected to be tested in an experiment in field conditions with tomatoes cultivated under protected environment. In this experiment, the weekly foliar pulverization of a suspension with 2x10(7) conidia mL-1 significantly decreased the incidence of gray mold, while the application of the antagonists on the seeds, substrate and seed hole during seeding did not reduced the incidence of the pathogen.