Wednesday, July 23, 2014

 

 



Soy un nuevo usuario

Olvidé mi contraseña

Entrada usuarios

Lógica Matemáticas Astronomía y Astrofísica Física Química Ciencias de la Vida
Ciencias de la Tierra y Espacio Ciencias Agrarias Ciencias Médicas Ciencias Tecnológicas Antropología Demografía
Ciencias Económicas Geografía Historia Ciencias Jurídicas y Derecho Lingüística Pedagogía
Ciencia Política Psicología Artes y Letras Sociología Ética Filosofía


Effects of soil drying and subsequent re-watering on the activity of nitrate reductase in roots and leaves of Helianthus annuus

1) La descarga del recurso depende de la página de origen
2) Para poder descargar el recurso, es necesario ser usuario
    registrado en Universia

  Descargar recurso   Descargar recurso   Descargar recurso

Detalles del recurso

$msg.ficha_linkToArchive: Sapientia Repositório Institucional Universidade do Algarve  

$msg.ficha_details_description: The effects of drought on the activity of nitrate reductase (NR) were studied in Helianthus annuus L. plants subjected to soil drying and subsequent rewatering. Drought did not negatively affect the activation state of NR, but resulted in linearly correlated decreases in the activity of the unphosphorilated active form and the total activity of NR, both in roots and leaves. The concentration of nitrate in roots, xylem and leaves also decreased in waterstressed plants, whereas the concentration of total amino acids was only transiently depressed at the leaf level. In contrast, soluble sugars accumulated both in roots and leaves of waterstressed plants. Drought-induced decrease in root NR activity was correlated with the observed changes in root nitrate concentration. A higher percentage of the decrease in foliar NR activity could be explained by the decline in nitrate flux to the leaves than by leaf nitrate content. Following rewatering, the extent of recovery of NR activity was higher in roots than in leaves. The delay in the recovery of foliar NR activity did not result from the persistence of reduced flux of nitrate through the xylem. Several hypotheses to explain the after-effect of soil drying on foliar NR activity are discussed.

$msg.ficha_details_authors: Azedo -  Silva, João -  Osório, Júlio -  Fonseca, Filomena -  Correia, Maria João - 

$msg.ficha_details_id: 55209777

$msg.ficha_details_language: eng  - 

$msg.ficha_details_version: 1.0

$msg.ficha_details_status: Final

$msg.ficha_details_keywordsStress hídrico - 

$msg.ficha_details_learningresourcetype: article  - 

$msg.ficha_details_interactivitytype: Expositivo

$msg.ficha_details_interactivitylevel: muy bajo

$msg.ficha_details_intendedenduserrole: Estudiante  -  Profesor  -  Autor  - 

$msg.ficha_details_structure: Atomic

$msg.ficha_details_cost: no

$msg.ficha_details_copyright: sí

: openAccess

$msg.ficha_details_requirements:  Browser: Any - 

$msg.ficha_details_submissiondate: 23-oct-2013

$msg.ficha_details_contact:

$msg.ficha_details_location:


$msg.ficha_otrosRecursos_autor

  1. Effective algorithm for building and solving linear systems Several mesh-based techniques in computer graphics such as shape deformation, mesh editing, animatio...
  2. Roteiro para a elaboração da Agenda 21 - Local em Almeirim Dissertação de Mestrado em Cidadania e Ambiental e Participação apresentada à Universidade Aberta
  3. Elementos de avaliação económica dos principais destinos turísticos portugueses O presente trabalho pretende ser um contributo para a análise do potencial de mobilização do turi...
  4. Manipulator path planning for pick-and-place operations with obstacles avoidance: an A* algorithm approach This paper presents a path planning method for pick-and-place operations with obstacles in the work ...
  5. Orientações para o treino dos fitkids no Holmes Place Health Club - Dolce Vita Tejo Mestrado em Exercício e Saúde - ramo de Aprofundamento de Competências Profissionais

$msg.ficha_otrosRecursos_mismaColeccion

  1. What drives distinct ploidy phases of isomorphic biphasic life cycles to occur at uneven abundances Dissertação de mest., Ciências do Mar, da Terra e do Ambiente (Biologia Populacional), Faculdade ...
  2. Regeneration in Zebrafish (Danio rerio) fins: pattern of expression of mineralization–related Gla proteins Teleost fishes have the exceptional ability to largely regenerate severed appendages comprising seve...
  3. Identificação de Malformações Esqueléticas em Peixes - Monitorizar e identificar as principais malformações que ocorrem em peixes produzidos em aquacul...
  4. Gla proteins as markers for studies of skeletal development and malformations in new aquaculture fish species (Pagrus auriga, Diplodus sargo and Scophtalmus maximus) Evaluation of the onset and the development of skeletal structures during larval ontogeny of commerc...
  5. Investimento em estradas e desenvolvimento regional em Portugal: O processo das auto-estradas Scut O objectivo deste trabalho é investigar o impacto económico regional dos investimentos em infra-es...

$msg.ficha_comments_title

No hay ninguna valoración para este recurso.Sea el primero en valorar este recurso.
 

$msg.home_busque