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000042750 0247_ $$2DOI$$a10.1093/jxb/eri072
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000042750 084__ $$2WoS$$aPlant Sciences
000042750 1001_ $$0P:(DE-Juel1)129379$$aPieruschka, R.$$b0$$uFZJ
000042750 245__ $$aLateral gas diffusion inside leaves
000042750 260__ $$aOxford$$bUniv. Press$$c2005
000042750 300__ $$a857 - 864
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000042750 440_0 $$03318$$aJournal of Experimental Botany$$v56$$x0022-0957$$y413
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000042750 520__ $$aDiffusion of CO2 inside leaves is generally regarded to be from the substomatal cavities to the assimilating tissues, i.e. in the vertical direction of the leaf blades. However, lateral gas diffusion within intercellular air spaces may be much more effective than hitherto considered. In a previous work it was demonstrated that, when 'clamp-on' leaf chambers are used, leaf internal 'CO2 leakage' beyond the leaf chamber gaskets may seriously affect gas exchange measurement. This effect has been used in the present paper to quantify gas conductance (g(leaf,l), mmol m(-2) s(-1)) in the lateral directions within leaves and significant differences between homo- and heterobaric leaves were observed. For the homobaric leaves, lateral gas conductance measured over a distance of 6 or 8 mm (the widths of the chamber gaskets) was 2-20% of vertical conductance taken from published data measured over much smaller distances of 108-280 microm (the thickness of the leaves). The specific internal gas diffusion properties of the leaves have been characterized by gas conductivities (g*(leaf), micromol m(-1) s(-1)). Gas conductivities in the lateral directions of heterobaric leaves were found to be small but not zero. In homobaric leaves, they were between 67 and 209 micromol m(-1) s(-1) and thus even larger than those in the vertical direction of the leaf blades (between 15 and 78 micromol m(-1) s(-1)). The potential implications for experimentalists performing gas exchange measurements are discussed.
000042750 536__ $$0G:(DE-Juel1)FUEK257$$2G:(DE-HGF)$$aChemie und Dynamik der Geo-Biosphäre$$cU01$$x0
000042750 588__ $$aDataset connected to Web of Science, Pubmed
000042750 650_2 $$2MeSH$$aCarbon Dioxide: physiology
000042750 650_2 $$2MeSH$$aDiffusion
000042750 650_2 $$2MeSH$$aPhaseolus: physiology
000042750 650_2 $$2MeSH$$aPhotosynthesis: physiology
000042750 650_2 $$2MeSH$$aPlant Leaves: physiology
000042750 650_2 $$2MeSH$$aPlant Transpiration: physiology
000042750 650_2 $$2MeSH$$aSoybeans: physiology
000042750 650_2 $$2MeSH$$aTime Factors
000042750 650_2 $$2MeSH$$aTobacco: physiology
000042750 650_2 $$2MeSH$$aVicia faba: physiology
000042750 650_7 $$0124-38-9$$2NLM Chemicals$$aCarbon Dioxide
000042750 650_7 $$2WoSType$$aJ
000042750 65320 $$2Author$$agas conductance
000042750 65320 $$2Author$$agas conductivity
000042750 65320 $$2Author$$agas exchange measurement
000042750 65320 $$2Author$$aheterobaric leaf anatomy
000042750 65320 $$2Author$$ahomobaric leaf anatomy
000042750 65320 $$2Author$$arespiration
000042750 7001_ $$0P:(DE-Juel1)129402$$aSchurr, U.$$b1$$uFZJ
000042750 7001_ $$0P:(DE-Juel1)129336$$aJahnke, S.$$b2$$uFZJ
000042750 773__ $$0PERI:(DE-600)1466717-4$$a10.1093/jxb/eri072$$gVol. 56, p. 857 - 864$$p857 - 864$$q56<857 - 864$$tThe @journal of experimental botany$$v56$$x0022-0957$$y2005
000042750 8567_ $$uhttp://dx.doi.org/10.1093/jxb/eri072
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