Seasonal fluctuations and temperature dependence in photosynthetic parameters and stomatal conductance at the leaf scale of Populus euphratica Oliv.
Tree Physiol
; 31(2): 178-95, 2011 Feb.
Article
em En
| MEDLINE
| ID: mdl-21411434
ABSTRACT
A combined model to simulate CO2 and H2O gas exchange at the leaf scale was parameterized using data obtained from in situ leaf-scale observations of diurnal and seasonal changes in CO2 and H2O gas exchange. The Farquhar et al.-type model of photosynthesis was parameterized by using the Bayesian approach and the Ball et al.-type stomatal conductance model was optimized using the linear least-squares procedure. The results show that the seasonal physiological changes in photosynthetic parameters (e.g., V(cmax25), J(max25), R(d25) and g(m25)) in the biochemical model of photosynthesis and m in the stomatal conductance model should be counted in estimating long-term CO2 and H2O gas exchange. Overall, the coupled model successfully reproduced the observed response in net assimilation and transpiration rates.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Populus
/
Estômatos de Plantas
Tipo de estudo:
Prognostic_studies
País como assunto:
Asia
Idioma:
En
Ano de publicação:
2011
Tipo de documento:
Article