Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.1/3330
Título: Interaction between water and nutrient deficiencies in helianthus annuus
Autor: Fonseca, Filomena
David, Maria Manuela
Barrote, Isabel
Ferreira, Gisela
Correia, Maria João
Palavras-chave: Water stress
Drought
Water deficit
Nutrient deficiency
Helianthus annuus
Leaf age
Data: 2000
Citação: Fonseca F., David M.M., Barrote I., Ferreira G., Correia M.J. (2000). Interaction between water and nutrient deficiencies in Helianthus annuus L. In: Nitrogen in a sustainable ecosystem. From the cell to the plant. Chapter 1 – N and Environmental Adaptation of Plants. Backhys Publishers, Leiden, The Netherlands. pp. 169-175
Resumo: The physiological response of plants to water deficits are known to vary according to the conditions of application of drought stress and the rate of development of leaf water deficits. At the whole plant level the effect of the water shess is usually perceived as a decrease in photosynthesis and growth, and is associated with alterations in C and N metabolism (McDonald and Davies, 1996). The decrease in water potential affects transpiration and hence xylem transport of nitrate or reduced N into growing regions. The response of the photo-synthetic apparatus either to water stress or rehydration seems to be dependent "on leaf age (O'Neill, 1983; Wolfe et al., 1988). Degradation of both thylakoid and stromal N-containing compounds can occur in response to water stress, recovery from which may pequire more than a week (Chaves, 1991).
URI: http://hdl.handle.net/10400.1/3330
ISBN: 9057820633
Aparece nas colecções:FCT3-Livros (ou partes, com ou sem arbitragem científica)

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