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@ARTICLE{Pieruschka:9362,
      author       = {Pieruschka, R. and Chavarria-Krauser, A. and Schurr, U. and
                      Jahnke, S.},
      title        = {{P}hotosynthesis in lightfleck areas of homobaric and
                      heterobaric leaves},
      journal      = {The journal of experimental botany},
      volume       = {61},
      number       = {4},
      issn         = {0022-0957},
      address      = {Oxford},
      publisher    = {Univ. Press},
      reportid     = {PreJuSER-9362},
      pages        = {1031 - 1039},
      year         = {2010},
      note         = {We are indebted to Dr Shizue Matsubara for critical reading
                      of the manuscript. This work was part of the doctoral thesis
                      of RP at Mathematisch-Naturwissenschaftliche Fakultat,
                      Heinrich-Heine Universitat, Dusseldorf, Germany.},
      abstract     = {Leaves within a canopy are exposed to a spatially and
                      temporally fluctuating light environment which may cause
                      lateral gradients in leaf internal CO(2) concentration and
                      diffusion between shaded and illuminated areas. In previous
                      studies it was hypothesized that lateral CO(2) diffusion may
                      support leaf photosynthesis, but the magnitude of this
                      effect is still not well understood. In the present study
                      homobaric leaves of Vicia faba or heterobaric leaves of
                      Glycine max were illuminated with lightflecks of different
                      sizes, mimicking sunflecks. Photosynthetic properties of the
                      lightfleck areas were assessed with combined gas exchange
                      measurements and chlorophyll fluorescence imaging. Lateral
                      diffusion in homobaric leaves with an interconnected
                      intercellular air space stimulated photosynthesis and the
                      effect was largest in small lightfleck areas, in particular
                      when plants were under drought stress. Such effects were not
                      observed in the heterobaric leaves with strongly
                      compartmented intercellular gas spaces. It is concluded that
                      lateral diffusion may significantly contribute to
                      photosynthesis of lightfleck areas of homobaric leaves
                      depending on lightfleck size, lateral diffusivity, and
                      stomatal conductance. Since homobaric leaf structures have
                      been reported for many plant species, it is hypothesized
                      that leaf homobary may have an impact on overall plant
                      performance under conditions with a highly heterogeneous
                      light environment.},
      keywords     = {Carbon Dioxide: chemistry / Carbon Dioxide: metabolism /
                      Diffusion / Kinetics / Light / Photosynthesis: radiation
                      effects / Plant Leaves: anatomy $\&$ histology / Plant
                      Leaves: chemistry / Plant Leaves: metabolism / Plant Leaves:
                      radiation effects / Soybeans: anatomy $\&$ histology /
                      Soybeans: chemistry / Soybeans: metabolism / Soybeans:
                      radiation effects / Vicia faba: anatomy $\&$ histology /
                      Vicia faba: chemistry / Vicia faba: metabolism / Vicia faba:
                      radiation effects / Carbon Dioxide (NLM Chemicals) / J
                      (WoSType)},
      cin          = {ICG-3 / JARA-ENERGY},
      ddc          = {580},
      cid          = {I:(DE-Juel1)ICG-3-20090406 / $I:(DE-82)080011_20140620$},
      pnm          = {Terrestrische Umwelt},
      pid          = {G:(DE-Juel1)FUEK407},
      shelfmark    = {Plant Sciences},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {pmid:20008895},
      pmc          = {pmc:PMC2826648},
      UT           = {WOS:000275567300009},
      doi          = {10.1093/jxb/erp368},
      url          = {https://juser.fz-juelich.de/record/9362},
}