Consulta: subjectFacets:"Vascular tissue"
Registros recuperados: 3
Data/hora: 09/06/2024 11:37:40

Feeding site of the spittlebug Mahanarva fimbriolata (Stål) (Hemiptera: Cercopidae) on sugarcane
Provedor de dados: Scientia Agricola
Autores: Garcia,José Francisco; Grisoto,Eliane; Botelho,Paulo Sérgio Machado; Parra,José Roberto Postali; Appezzato-da-Glória,Beatriz.
The sugarcane spittlebug Mahanarva fimbriolata (Stål) (Hemiptera: Cercopidae) is a pest of mechanically-harvested sugarcane in Brazil, when trash burning is not performed. To better understand the differences in feeding behavior of adults and nymphs of this pest and the subsequent disorders that arise, stylet penetration through fixation, staining and sectioning was investigated. Nymphs cause a "physiological disorder" damaging the tracheary system of the roots, slowing or preventing water and nutrient flow, with phloem and xylem dehydration. Nymphs insert their stylets through the epidermis, crossing the cortex, endodermis and pericycle before reaching the vascular cylinder, where they feed in the sieve-tube elements of the primary phloem. In contrast,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Anatomy; Insect-plant interaction; Salivary sheath; Vascular tissue.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162007000500014

Salinity induced anatomical and morphological changes in Chloris gayana Kunth roots
Provedor de dados: Biocell
Autores: Céccoli,Gabriel; Ramos,Julio C.; Ortega,Leandro I.; Acosta,Juan M.; Perreta,Mariel G.
Chloris gayana Kunth is a grass species valuable as forage which was introduced into Argentina to be used as pasture in saline soils of subtropical and warm-temperate zones, given its good adaptability to drought, salinity and mild freezing. However, its tolerance varies according to the cultivar. In tetraploid cultivars, important reductions in yield have been observed. Here, a study of the variations produced on the root and stem system by salinity at different NaCl concentrations (0, 150 y 250 mM) was performed in the Boma cultivar, with the aim of determining the anatomical and morphological alterations produced by the salt excess. Plants cultivated with the highest level of salinity showed, in the whole, significant differences in the measured...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Abiotic stress; Tolerance; Vascular tissue.
Ano: 2011
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0327-95452011000100002

Role of adenylyl cyclase in reduced β-adrenoceptor-mediated vasorelaxation during maturation
Provedor de dados: Brazilian Journal of Medical and Biological Research
Autores: López-Canales,O.A.; Castillo-Hernandez,M.C.; Vargas-Robles,H.; Rios,A.; López-Canales,J.S.; Escalante,B.
Beta-adrenergic receptor (βAR)-dependent blood vessel relaxation is impaired in older animals and G protein activation has been suggested as the causative mechanism. Here, we investigated the role of βAR subtypes (β1AR, β2AR, and β3AR) and cAMP in maturation-dependent vasorelaxation impairment. Aortic rings from 15 Sprague-Dawley male rats (3 or 9 weeks old) were harvested and left intact or denuded of the endothelium. Vascular relaxation in aortic rings from younger and older groups was compared in the presence of βAR subtype agonists and antagonists along with cAMP and cGMP antagonists. Isolated aortic rings were used to evaluate relaxation responses, protein expression was evaluated by western blot or real time PCR, and metabolites were measured by...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Β adrenergic receptors; Vascular tissue; Adenyl cyclase.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2016000700605