Skip navigation
Universidade Federal da Bahia |
Repositório Institucional da UFBA
Use este identificador para citar ou linkar para este item: https://repositorio.ufba.br/handle/ri/6558
Registro completo de metadados
Campo DCValorIdioma
dc.contributor.authorRottenberger, S.-
dc.contributor.authorKuhn, U.-
dc.contributor.authorWolf, A.-
dc.contributor.authorSchebeske, G.-
dc.contributor.authorOliva, S. T.-
dc.contributor.authorTavares, Tânia Mascarenhas-
dc.contributor.authorKesselmeier, J.-
dc.creatorRottenberger, S.-
dc.creatorKuhn, U.-
dc.creatorWolf, A.-
dc.creatorSchebeske, G.-
dc.creatorOliva, S. T.-
dc.creatorTavares, Tânia Mascarenhas-
dc.creatorKesselmeier, J.-
dc.date.accessioned2012-08-07T18:06:07Z-
dc.date.issued2005-04-
dc.identifier.issn1352-2310-
dc.identifier.urihttp://www.repositorio.ufba.br/ri/handle/ri/6558-
dc.descriptionTrabalho completo: acesso restrito, p. 2275–2279pt_BR
dc.description.abstracthe effect of leaf age on the formaldehyde (HCHO) and acetaldehyde (CH3CHO) exchange pattern of the deciduous Amazonian tree species Hymenaea courbaril was investigated under field conditions. Branch enclosure measurements on senescent, young, and mature leaves showed that leaf development had a pronounced impact on the aldehyde exchange behavior with respect to both the direction and the magnitude of the exchange. The emission activity of senescent leaves was associated with a negative CO2 balance, even during daytime, indicative of a catabolic metabolism and decomposition processes leading to an increased aldehyde production within the leaf. The low exchange rates observed in young leaves were attributed to low stomatal conductance, while in mature leaves stomatal conductance and metabolic activities allowed efficient uptake. Within each leaf class the diurnal variations in the exchange of both aldehyde compounds were found to be mainly dependent on the respective ambient air concentrations. High ambient air concentrations resulted in decreased emission rates of senescent leaves and in enhanced uptake in young and mature leaves. CH3CHO compensation points decreased from 1.8 to 1.1 ppb with leaf maturation. We provide evidence that leaf-age-dependent variations in the stomatal conductance can account for the major share of differences in the CH3CHO deposition velocity. The results indicate that leaf surfaces of young and mature leaves may represent an effective additional non-stomatal sink for atmospheric aldehydes.pt_BR
dc.language.isoenpt_BR
dc.publisherElsevierpt_BR
dc.sourcehttp://dx.doi.org/10.1016/j.atmosenv.2004.12.027pt_BR
dc.subjectPhenologypt_BR
dc.subjectCarbonylspt_BR
dc.subjectEmissionpt_BR
dc.subjectDepositionpt_BR
dc.subjectDeciduous tropical treespt_BR
dc.subjectAmazoniapt_BR
dc.titleFormaldehyde and acetaldehyde exchange during leaf development of the Amazonian deciduous tree species Hymenaea courbarilpt_BR
dc.title.alternativeAtmospheric Environmentpt_BR
dc.typeArtigo de Periódicopt_BR
dc.identifier.numberv. 39, n.12pt_BR
dc.embargo.liftdate10000-01-01-
Aparece nas coleções:Artigo Publicado em Periódico (Química)

Arquivos associados a este item:
Arquivo Descrição TamanhoFormato 
(150).pdf
  Restricted Access
286,09 kBAdobe PDFVisualizar/Abrir Solicitar uma cópia
Mostrar registro simples do item Visualizar estatísticas


Os itens no repositório estão protegidos por copyright, com todos os direitos reservados, salvo quando é indicado o contrário.