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Parameterization of the CO 2 and H 2 O gas exchange of several temperate deciduous broad‐leaved trees at the leaf scale considering seasonal changes
Author(s) -
KOSUGI Y.,
SHIBATA S.,
KOBASHI S.
Publication year - 2003
Publication title -
plant, cell and environment
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.646
H-Index - 200
eISSN - 1365-3040
pISSN - 0140-7791
DOI - 10.1046/j.1365-3040.2003.00960.x
Subject(s) - photosynthesis , stomatal conductance , deciduous , temperate climate , transpiration , atmospheric sciences , botany , temperate forest , temperate deciduous forest , chemistry , environmental science , horticulture , physics , biology
A combined model to simulate CO 2 and H 2 O gas exchange at the leaf scale was parameterized using data obtained from in situ leaf‐scale observations of diurnal and seasonal changes in the CO 2 and H 2 O gas exchange of four temperate deciduous broad‐leaved trees using a porometric method. The model consists of a Ball et al . type stomatal conductance submodel [Ball, Woodrow & Berry, pp. 221–224 in Progress in Photosynthesis Research (ed. I. Biggins), Martinus‐Nijhoff Publishers, Dordrecht, The Netherlands, 1987] and a Farquhar et al . type biochemical submodel of photosynthesis (Farquhar, von Caemmerer & Berry, Planta 149, 78–90, 1980). In these submodels, several parameters were optimized for each tree species as representative of the quantitative characteristics related to gas exchange. The results show that the seasonal physiological changes of V cmax25 in the biochemical model of photosynthesis should be used to estimate the long‐term CO 2 gas exchange. For R d25 in the biochemical model of photosynthesis and m in the Ball et al . type stomatal conductance model, the difference should be counted during the leaf expansion period.