http://www.cnr.it/ontology/cnr/individuo/prodotto/ID10602
Water relations and gas exchange in Poplar and willows under water stress and elevated atmospheric CO2 (Articolo in rivista)
- Type
- Label
- Water relations and gas exchange in Poplar and willows under water stress and elevated atmospheric CO2 (Articolo in rivista) (literal)
- Anno
- 2002-01-01T00:00:00+01:00 (literal)
- Alternative label
Johnson JD, Tognetti R, Paris P (2002)
Water relations and gas exchange in Poplar and willows under water stress and elevated atmospheric CO2
in Physiologia plantarum (Kbh., 1948)
(literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
- Johnson JD, Tognetti R, Paris P (literal)
- Pagina inizio
- Pagina fine
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#altreInformazioni
- Rivista internazionale di fisiologia vegetale con impact factor 1,565 (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
- Rivista
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#descrizioneSinteticaDelProdotto
- E stata valutata, in ambiente controllato, la risposta di cloni di pioppo e salice allo stress idrico ed allincremento di CO2 atmosferica, fattori accoppiati nelle previsioni di global change collegati alleffetto serra. E stata dimostrato che nel salice lalta concentrazione di CO2 mitiga gli effetti negativi dello stress idrico. (literal)
- Note
- ISI Web of Science (WOS) (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
- 1Univ Dublin, 2Univ Molise, 3CNR (literal)
- Titolo
- Water relations and gas exchange in Poplar and willows under water stress and elevated atmospheric CO2 (literal)
- Abstract
- Predictions of shifts in rainfall patterns as atmospheric [CO2] increases could impact the growth of fast growing trees such as Populus spp. and Salix spp. and the interaction between elevated CO2 and water stress in these species is unknown. The objectives of this study were to characterize the responses to elevated CO2 and water stress in these two species, and to determine if elevated CO2 mitigated drought stress effects. Gas exchange, water potential components, whole plant transpiration and growth response to soil drying and recovery were assessed in hybrid poplar (clone 53-246) and willow (Salix sagitta) rooted cuttings growing in either ambient (350 µmol mol) or elevated (700 µmol mol) atmospheric CO2 concentration ([CO2]). Predawn water potential decreased with increasing water stress while midday water potentials remained unchanged (isohydric response). Turgor potentials at both predawn and midday increased in elevated [CO2], indicative of osmotic adjustment. Gas exchange was reduced by water stress while elevated [CO2] increased photosynthetic rates, reduced leaf conductance and nearly doubled instantaneous transpiration efficiency in both species. Dark respiration decreased in elevated [CO2] and water stress reduced Rd in the trees growing in ambient [CO2]. Willow had 56% lower whole plant hydraulic conductivity than poplar, and showed a 14% increase in elevated [CO2] while poplar was unresponsive. The physiological responses exhibited by poplar and willow to elevated [CO2] and water stress, singly, suggest that these species respond like other tree species. The interaction of [CO2] and water stress suggests that elevated [CO2] did mitigate the effects of water stress in willow, but not in poplar. (literal)
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