Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 401467
Title Microscale gas exchange modelling in leaves using combined gas diffusion and photosynthesis kinetics
Author(s) Ho, Q.T.; Yin, X.; Verboven, P.; Struik, P.C.; Nicolai, B.M.
Source In: Abstracts of SEB (Society for Experimental Biology) Main Meeting, Prague, Czech Republic, 30 June - 03 July, 2010. - Prague, Czech Republic : - p. 318 - 319.
Event Prague, Czech Republic : SEB Annual Main Meeting 2010, Prague, Czech Republic, 2010-06-30/2010-07-03
Department(s) Crop and Weed Ecology
PE&RC
Publication type Abstract in scientific journal or proceedings
Publication year 2010
Abstract Gas exchange in leaves is modelled using combined gas diffusion and photosynthesis kinetics in a 2D cellular structure of a wheat leaf. The microscale model for gas exchange accounted for diffusive mass transport of CO2 in the intercellular space (pores), the cell wall network and the intracellular liquid of cells. The photosynthesis kinetics described by the extended Farquhar, von Caemmerer & Berry model were coupled to the gas exchange inside the mesophyll cells. The coupled model was validated by means of gas exchange and chlorophyll fluorescence measurements. The theoretical model simulations revealed the microscale gas distribution and exchange rates in the leaf. Mesophyll cells that were exposed to air voids showed strong CO2 concentration gradients across the cell. These simulation results explained for the first time why the mesophyll conductance gm is dynamically changing in response to environmental conditions. Likewise, the microscale model provided detailed insight of stomatal conductance in response to changes in CO2 concentration and irradiance around leaves.
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