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@ARTICLE{Pons:138965,
      author       = {Pons, T. L. and Poorter, Hendrik},
      title        = {{T}he effect of irradiance on the carbon balance and tissue
                      characteristics of five herbaceous species differing in
                      shade-tolerance},
      journal      = {Frontiers in plant science},
      volume       = {5},
      number       = {12},
      issn         = {1664-462X},
      address      = {Lausanne},
      publisher    = {Frontiers Media},
      reportid     = {FZJ-2013-05007},
      pages        = {1 - 14},
      year         = {2014},
      abstract     = {The carbon balance is defined here as the partitioning of
                      daily whole-plant gross CO2 assimilation (A) in C available
                      for growth and C required for respiration (R). A scales
                      positively with growth irradiance and there is evidence for
                      an irradiance dependence of R as well. Here we ask if R as a
                      fraction of A is also irradiance dependent, whether there
                      are systematic differences in C-balance between
                      shade-tolerant and shade-intolerant species, and what the
                      causes could be. Growth, gas exchange, chemical composition
                      and leaf structure were analyzed for two shade-tolerant and
                      three shade-intolerant herbaceous species that were
                      hydroponically grown in a growth room at five irradiances
                      from 20 μmol m−2 s−1 (1.2 mol m−2 day−1) to 500
                      μmol m−2 s−1 (30 mol m−2 day−1). Growth analysis
                      showed little difference between species in unit leaf rate
                      (dry mass increase per unit leaf area) at low irradiance,
                      but lower rates for the shade-tolerant species at high
                      irradiance, mainly as a result of their lower
                      light-saturated rate of photosynthesis. This resulted in
                      lower relative growth rates in these conditions. Daily
                      whole-plant R scaled with A in a very tight manner, giving a
                      remarkably constant R/A ratio of around 0.3 for all but the
                      lowest irradiance. Although some shade-intolerant species
                      showed tendencies toward a higher R/A and inefficiencies in
                      terms of carbon and nitrogen investment in their leaves, no
                      conclusive evidence was found for systematic differences in
                      C-balance between the shade-tolerant and intolerant species
                      at the lowest irradiance. Leaf tissue of the shade-tolerant
                      species was characterized by high dry matter percentages,
                      C-concentration and construction costs, which could be
                      associated with a better defense in shade environments where
                      leaf longevity matters. We conclude that shade-intolerant
                      species have a competitive advantage at high irradiance due
                      to superior potential growth rates, but that shade-tolerance
                      is not necessarily associated with a better C-balance at low
                      irradiance. Under those conditions tolerance to other
                      stresses is probably more important for the performance of
                      shade-tolerant species.},
      cin          = {IBG-2},
      ddc          = {570},
      cid          = {I:(DE-Juel1)IBG-2-20101118},
      pnm          = {242 - Sustainable Bioproduction (POF2-242) / 89582 - Plant
                      Science (POF2-89582)},
      pid          = {G:(DE-HGF)POF2-242 / G:(DE-HGF)POF2-89582},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000331532600001},
      pubmed       = {pmid:24550922},
      doi          = {10.3389/fpls.2014.00012},
      url          = {https://juser.fz-juelich.de/record/138965},
}