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@ARTICLE{Shane:56266,
      author       = {Shane, M. W. and Lambers, H. and Gawthray, G.R. and Kuhn,
                      A. J. and Schurr, U.},
      title        = {{I}mpact of phosphorus mineral source ({A}l-{P} or
                      {F}e-{P}) and p{H} on cluster-root formation and carboxylate
                      exudation in {L}upinus albus {L}.},
      journal      = {Plant and soil},
      volume       = {304},
      issn         = {0032-079X},
      address      = {Dordrecht [u.a.]},
      publisher    = {Springer Science + Business Media B.V},
      reportid     = {PreJuSER-56266},
      pages        = {169 - 178},
      year         = {2008},
      note         = {Record converted from VDB: 12.11.2012},
      abstract     = {Lupinus albus L. were grown in rhizoboxes containing a soil
                      amended with sparingly available Fe-P or Al-P (100 mu g P
                      g(-1) soil/resin mixture). Root halves of individual plants
                      were supplied with nutrient solution (minus P) buffered at
                      either pH 5.5 or 7.5, to assess whether the source of
                      mineral-bound P and/or pH influence cluster-root growth and
                      carboxylate exudation. The P-amended soil was mixed 3:1
                      (w/w) with anion-exchange resins to allow rapid fixation of
                      carboxylates. Treatments lasted 10 weeks. Forty percent and
                      $30\%$ of the root mass developed as cluster roots in plants
                      grown on Fe-P and Al-P respectively, but cluster-root growth
                      was the same on root-halves grown at pH 5.5 or 7.5.
                      Mineral-bound P source (Al- or Fe-P) had no influence on the
                      types of carboxylates measured in soil associated with
                      cluster roots-citrate (and trace amounts of malate and
                      fumarate) was the only major carboxylate detected. The
                      [citrate] in the rhizosphere of cluster roots decreased with
                      increased shoot P status (suggesting a systemic effect) and
                      also, only for plants grown on Al-P, with decreased pH in
                      the root environment (suggesting a local effect). In a
                      separate experiment using anion exchange resins pre-loaded
                      with malate or citrate, we measured malate $(50\%)$ and
                      citrate $(79\%)$ recovery after 30 days in soil. We
                      therefore, also conclude that measurements of [citrate] and
                      [malate] at the root surface may be underestimated and would
                      be greater than the 40- and 1.6-mu mol g(-1) root DM,
                      respectively estimated by us and others because of
                      decomposition of carboxylates around roots prior to
                      sampling.},
      keywords     = {J (WoSType)},
      cin          = {ICG-3},
      ddc          = {570},
      cid          = {I:(DE-Juel1)ICG-3-20090406},
      pnm          = {Terrestrische Umwelt},
      pid          = {G:(DE-Juel1)FUEK407},
      shelfmark    = {Agronomy / Plant Sciences / Soil Science},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000253216200013},
      doi          = {10.1007/s11104-007-9535-7},
      url          = {https://juser.fz-juelich.de/record/56266},
}