% IMPORTANT: The following is UTF-8 encoded.  This means that in the presence
% of non-ASCII characters, it will not work with BibTeX 0.99 or older.
% Instead, you should use an up-to-date BibTeX implementation like “bibtex8” or
% “biber”.

@ARTICLE{Jahnke:52636,
      author       = {Jahnke, S. and Pieruschka, R.},
      title        = {{A}ir pressure in clamp-on leaf chambers: a neglected issue
                      in gas exchange measurements},
      journal      = {The journal of experimental botany},
      volume       = {57},
      issn         = {0022-0957},
      address      = {Oxford},
      publisher    = {Univ. Press},
      reportid     = {PreJuSER-52636},
      pages        = {2553 - 2561},
      year         = {2006},
      note         = {Record converted from VDB: 12.11.2012},
      abstract     = {Air pressure in leaf chambers is thought to affect gas
                      exchange measurements through changes in partial pressure of
                      the air components. However, other effects may come into
                      play when homobaric leaves are measured in which internal
                      lateral gas flow may occur. When there was no pressure
                      difference between the leaf chamber and ambient air
                      (DeltaP=0), it was found in previous work that lateral CO(2)
                      diffusion could affect measurements performed with clamp-on
                      leaf chambers. On the other hand, overpressure (DeltaP>0) in
                      leaf chambers has been reported to minimize artefacts
                      possibly caused by leaks in chamber sealing. In the present
                      work, net CO(2) exchange rates (NCER) were measured under
                      different DeltaP values (0.0-3.0 kPa) on heterobaric and
                      homobaric leaves. In heterobaric leaves which have internal
                      barriers for lateral gas movement, changes in DeltaP had no
                      significant effect on NCER. For homobaric leaves, effects of
                      DeltaP>0 on measured NCER were significant, obviously due to
                      lateral gas flux inside the leaf mesophyll. The magnitude of
                      the effect was largely defined by stomatal conductance; when
                      stomata were widely open, the impact of DeltaP on measured
                      NCER was up to 7 mumol CO(2) m(-2) s(-1) kPa(-1). Since many
                      other factors are also involved, neither DeltaP=0 nor
                      DeltaP>0 was found to be the 'one-size fits all' solution to
                      avoid erroneous effects of lateral gas transport on
                      measurements with clamp-on leaf chambers.},
      keywords     = {Air Pressure / Artifacts / Botany: instrumentation /
                      Botany: methods / Botany: standards / Carbon Dioxide:
                      chemistry / Carbon Dioxide: metabolism / Diffusion /
                      Photosynthesis / Plant Leaves: metabolism / Plant
                      Transpiration: physiology / Carbon Dioxide (NLM Chemicals) /
                      J (WoSType)},
      cin          = {ICG-III},
      ddc          = {580},
      cid          = {I:(DE-Juel1)VDB49},
      pnm          = {Terrestrische Umwelt},
      pid          = {G:(DE-Juel1)FUEK407},
      shelfmark    = {Plant Sciences},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {pmid:16820393},
      UT           = {WOS:000239901500009},
      doi          = {10.1093/jxb/erl003},
      url          = {https://juser.fz-juelich.de/record/52636},
}