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@ARTICLE{Kumar:884849,
      author       = {Kumar, Amit and van Duijnen, Richard and Delory, Benjamin
                      M. and Reichel, Rüdiger and Brüggemann, Nicolas and
                      Temperton, Vicky M.},
      title        = {{B}arley shoot biomass responds strongly to {N}:{P}
                      stoichiometry and intraspecific competition, whereas roots
                      only alter their foraging},
      journal      = {Plant and soil},
      volume       = {453},
      number       = {1-2},
      issn         = {1573-5036},
      address      = {Dordrecht [u.a.]},
      publisher    = {Springer Science + Business Media B.V},
      reportid     = {FZJ-2020-03286},
      pages        = {515 - 528},
      year         = {2020},
      abstract     = {AimsRoot system responses to the limitation of either
                      nitrogen (N) or phosphorus (P) are well documented, but how
                      the early root system responds to (co-) limitation of one (N
                      or P) or both in a stoichiometric framework is not
                      well-known. In addition, how intraspecific competition
                      alters plant responses to N:P stoichiometry is understudied.
                      Therefore, we aimed to investigate the effects of N:P
                      stoichiometry and competition on root system responses and
                      overall plant performance.MethodsPlants (Hordeum vulgare L.)
                      were grown in rhizoboxes for 24 days in the presence or
                      absence of competition (three vs. one plant per rhizobox),
                      and fertilized with different combinations of N:P (low
                      N + low P, low N + high P, high N + low P, and
                      high N + high P).ResultsShoot biomass was highest when
                      both N and P were provided in high amounts. In competition,
                      shoot biomass decreased on average by $22\%.$ Total root
                      biomass (per plant) was not affected by N:P stoichiometry
                      and competition but differences were observed in specific
                      root length and root biomass allocation across soil depths.
                      Specific root length depended on the identity of limiting
                      nutrient (N or P) and competition. Plants had higher
                      proportion of root biomass in deeper soil layers under N
                      limitation, while a greater proportion of root biomass was
                      found at the top soil layers under P
                      limitation.ConclusionsWith low N and P availability during
                      early growth, higher investments in root system development
                      can significantly trade off with aboveground productivity,
                      and strong intraspecific competition can further strengthen
                      such effects.},
      cin          = {IBG-3},
      ddc          = {580},
      cid          = {I:(DE-Juel1)IBG-3-20101118},
      pnm          = {255 - Terrestrial Systems: From Observation to Prediction
                      (POF3-255)},
      pid          = {G:(DE-HGF)POF3-255},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000547222400001},
      doi          = {10.1007/s11104-020-04626-w},
      url          = {https://juser.fz-juelich.de/record/884849},
}