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@ARTICLE{Chen:200855,
      author       = {Chen, Bin J. W. and During, Heinjo J. and Vermeulen, Peter
                      J. and de Kroon, Hans and Poorter, Hendrik and Anten, Niels
                      P. R.},
      title        = {{C}orrections for rooting volume and plant size reveal
                      negative effects of neighbour presence on root allocation in
                      peaplant},
      journal      = {Functional ecology},
      volume       = {29},
      number       = {11},
      issn         = {0269-8463},
      address      = {Oxford [u.a.]},
      publisher    = {Wiley-Blackwell},
      reportid     = {FZJ-2015-03230},
      pages        = {1383–1391},
      year         = {2015},
      abstract     = {1. Plants are able to detect the presence of their
                      neighbours below-ground. The associated root responses may
                      affect plant performance, plant–plant interactions and
                      community dynamics, but the extent and direction of these
                      responses is heavily debated. 2. Some studies suggest that
                      plants will over-proliferate roots in response to neighbours
                      at the expense of reproduction, which was framed as a
                      ‘tragedy of the commons’. Others propose an ‘ideal
                      free distribution’ hypothesis stating that plants produce
                      roots simply as a function of the amount of available
                      nutrients. However, experimental evidence for either
                      hypothesis that is unbiased by confounding effects of
                      rooting volume and plant size in their experimental set-ups
                      is still lacking. 3. We grew split-root pea plants in the
                      presence or absence of a below-ground neighbour at a range
                      of rooting volumes, while providing equal amounts of
                      nutrients per plant. Path analyses were used to disentangle
                      the direct effects of neighbour presence on allocation
                      patterns from the confounding effects of rooting volume and
                      plant size. 4. Within the chosen range of rooting volumes,
                      the presence of a below-ground neighbour generally reduced
                      plant root mass by $21\%$ and total mass by $9\%.$ A
                      doubling of rooting volume generally increased plant root
                      mass by $22\%$ and total mass by $11\%.$ Pod mass was only
                      directly and positively correlated with vegetative mass. 5.
                      The presence of a below-ground neighbour induced less root
                      allocation but more pod allocation, whereas increased
                      rooting volume caused a reduction in reproductive
                      allocation. A large part of these effects, however, was
                      indirectly mediated through the influence on plant total
                      mass. 6. Synthesis. Not considering the effects of rooting
                      volume and plant size may lead to misinterpretations of
                      plant growth strategies in response to neighbours.
                      Accounting for these factors, we found pea allocating less
                      mass to roots in the presence of a below-ground neighbour.
                      The obtained results can help to reconcile the various
                      responses to below-ground neighbours as they are published
                      in the literature.},
      cin          = {IBG-2},
      ddc          = {570},
      cid          = {I:(DE-Juel1)IBG-2-20101118},
      pnm          = {582 - Plant Science (POF3-582)},
      pid          = {G:(DE-HGF)POF3-582},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000364312600003},
      doi          = {10.1111/1365-2435.12450},
      url          = {https://juser.fz-juelich.de/record/200855},
}