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@ARTICLE{Pieruschka:42750,
      author       = {Pieruschka, R. and Schurr, U. and Jahnke, S.},
      title        = {{L}ateral gas diffusion inside leaves},
      journal      = {The journal of experimental botany},
      volume       = {56},
      issn         = {0022-0957},
      address      = {Oxford},
      publisher    = {Univ. Press},
      reportid     = {PreJuSER-42750},
      pages        = {857 - 864},
      year         = {2005},
      note         = {Record converted from VDB: 12.11.2012},
      abstract     = {Diffusion 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.},
      keywords     = {Carbon Dioxide: physiology / Diffusion / Phaseolus:
                      physiology / Photosynthesis: physiology / Plant Leaves:
                      physiology / Plant Transpiration: physiology / Soybeans:
                      physiology / Time Factors / Tobacco: physiology / Vicia
                      faba: physiology / Carbon Dioxide (NLM Chemicals) / J
                      (WoSType)},
      cin          = {ICG-III},
      ddc          = {580},
      cid          = {I:(DE-Juel1)VDB49},
      pnm          = {Chemie und Dynamik der Geo-Biosphäre},
      pid          = {G:(DE-Juel1)FUEK257},
      shelfmark    = {Plant Sciences},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {pmid:15668225},
      UT           = {WOS:000227565100009},
      doi          = {10.1093/jxb/eri072},
      url          = {https://juser.fz-juelich.de/record/42750},
}