RESUMO
This study analyzes the effects of procyanidin B2 on early wheat plant growth and plant biochemical responses promoted by lipopolysaccharides (LPS) derived from the rhizobacteria Azospirillum brasilense Sp245. Measurements of leaf, root length, fresh weight, and dry weight showed in vitro plant growth stimulation 4 days after treatment with A. brasilense as well as LPS. Superoxide anion (O2·-) and hydrogen peroxide (H2O2) levels increased in seedling roots treated with LPS (100 µg mL-1). The chlorophyll content in leaf decreased while the starch content increased 24 h after treatment in seedling roots. The LPS treatment induced a high increase in total peroxidase (POX) (EC 1.11.1.7) activity and ionically bound cell wall POX content in roots, when compared to respective controls. Early plant growth and biochemical responses observed in wheat seedlings treated with LPS were inhibited by the addition of procyanidin B2 (5 µg mL-1), a B type proanthocyanidin (PAC), plant-derived polyphenolic compound with binding properties of LPS. All results suggest first that the ionically bound cell wall POX enzymes could be a molecular target of A. brasilense LPS, and second that the recognition or association of LPS by plant cells is required to activate plant responses. This last event could play a critical role during plant growth regulation by A. brasilense LPS.
Assuntos
Azospirillum brasilense/química , Biflavonoides/farmacologia , Catequina/farmacologia , Lipopolissacarídeos/farmacologia , Proantocianidinas/farmacologia , Plântula/crescimento & desenvolvimento , Triticum/crescimento & desenvolvimento , Biomassa , Peróxido de Hidrogênio/metabolismo , Peroxidases/metabolismo , Pigmentos Biológicos/metabolismo , Raízes de Plantas/efeitos dos fármacos , Raízes de Plantas/metabolismo , Plântula/efeitos dos fármacos , Amido/metabolismo , Triticum/efeitos dos fármacosRESUMO
La pseudoartrosis de calcáneo es excepcional. La incidencia es del 1,3 por ciento de todas las fracturas intraarticulares. Se relaciona con fracturas intraarticulares tratadas conservadoramente, diabetes mellitus, tabaquismo y fracturas abiertas. Presentamos un caso de pseudoartrosis de calcáneo, secuela de fractura de luxación abierta en el contexto de un pie catastrófico(AU)
Calcaneal pseudoarthrosis is rare and its incidence accounts for 1.3 percent of all the intra-articular fractures. It is associated to intra-articular fractures treated with conservative methods, diabetes mellitus, smoking and open fractures. This is a calcaneal pseudoarthrosis case as a sequel of open dislocation fracture in a catastrophic foot injure(AU)
La pseudarthrose du calcanéum est une affection assez rare. Son incidence est 1.3 pourcent de toutes les fractures interarticulaires. Elle est associée aux fractures interarticulaires traitées de façon conservatrice, au diabète sucré, au tabagisme, et aux fractures ouvertes. Un cas de pseudarthrose de calcanéum, séquelle d'une fracture-luxation ouverte du pied après accident de route, est présenté(AU)
Assuntos
Humanos , Feminino , Pessoa de Meia-Idade , Pseudoartrose , Calcâneo/cirurgia , Fraturas Expostas/etiologia , Pseudoartrose/diagnóstico por imagem , Fatores de RiscoRESUMO
Se hace un estudio de 54 pacientes a los cuales se les practicó epifisiodesis con grapas según Blount (7 Varos, 47 Valgos). Según los parámetros de evaluación se obtuvieron 34 resultados buenos, 9 regulares y 11 malos. En nuestro medio la espifisiodesis temporal según Blount ha demostrado ser la técnica de elección para la corrección de deformidades axiales de rodilla