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CALCULATING LEAF BOUNDARY LAYER PARAMETERS WITH THE TWO-DIMENSIONAL MODEL 2DLEAF COMPARING TRANSPIRATION RATES OF NORMAL (CV. DESIREE) AND TRANSGENIC (SUCROSE TRANSPORT ANTISENSE) POTATO PLANTS

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概要 The leaf boundary layer, i. e. the layer of air adjacent to a leaf surface in which gas flow is significantly influenced by the leaf, considerably affects leaf gas exchange. Numerous factors, both ext...ernal conditions and leaf properties, have a strong influence on boundary layer characteristics and the challenge to develop a reliable model of this link in the leaf gas exchange pathway has persisted for decades. Two parameters, the boundary layer thickness, d, and the ratio, B, of the diffusion coefficients of gases in the boundary layer and in the intercellular space, were shown to be sufficient to represent the effect of the boundary layer in a two-dimensional leaf gas exchange model 2DLEAF. An algorithm for calculation of these parameters is described and applied to simulate the transpiration rate of leaves in normal (cv. Desiree) and transgenic (expressing a mRNA antisense construct targeted to the cp-fructose-6-bisphosphate phosphatase) potato plants (Solanum tuberosum). For these leaves, both gas exchange and leaf anatomy have been studied. Parameters d and B were different for normal and transgenic leaves, and they expressed real differences in anatomy and surface properties.続きを見る

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登録日 2009.04.22
更新日 2015.11.06