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@ARTICLE{Gould:38398,
      author       = {Gould, N. and Thorpe, M. R. and Minchin, P. E. H. and
                      Pritchard, J. and White, P. J.},
      title        = {{S}olute is imported to elongating root cells of barley as
                      a pressure driven flow of solution},
      journal      = {Functional plant biology},
      volume       = {31},
      issn         = {1445-4408},
      address      = {Collingwood, Victoria},
      publisher    = {CSIRO Publ.},
      reportid     = {PreJuSER-38398},
      pages        = {391 - 397},
      year         = {2004},
      note         = {Record converted from VDB: 12.11.2012},
      abstract     = {This work relates solute import to elongating root cells in
                      barley to the water relations of the symplastic pathway
                      under conditions of varied plant K+ status. K+ is a major
                      constituent of phloem sieve element (SE) sap, and as an
                      osmoticum, it is believed to have a role in maintaining SE
                      hydrostatic pressure and thus sap flow from source to sink
                      tissue. The hypothesis that the solute import to elongating
                      root cells is linked to pressure driven flow from the sieve
                      tube is examined.Plants were grown in solutions containing
                      either 0.05 m M (low K) or 2.05 m M (high K) K+
                      concentration. Solute import to the root elongation zone was
                      estimated from biomass accumulation over time accounting for
                      respiration and root elongation rate. SE sap K+
                      concentration was measured using X-ray microanalyses and
                      osmotic pressure by picolitre osmometry. SE hydrostatic
                      pressure was measured directly with a pressure probe glued
                      onto an excised aphid stylet. Elongating root cell
                      hydrostatic pressure was measured using a cell pressure
                      probe.The low-K plants had lower SE K+ concentration and SE
                      hydrostatic pressure compared to the high-K plants, but the
                      elongating root cell hydrostatic pressure was similar in
                      both treatments, thus the pressure difference between the SE
                      and elongating root cells was less in the low-K plants
                      compared to the high-K plants.The solute import rate to
                      elongating root cells was lower in the low K plants and the
                      reduction could be accounted for as a pressure driven solute
                      flux, with a reduction both in the pressure difference
                      between root sieve elements and elongating cells, and in the
                      sap concentration.},
      keywords     = {J (WoSType)},
      cin          = {ICG-III},
      ddc          = {580},
      cid          = {I:(DE-Juel1)VDB49},
      pnm          = {Chemie und Dynamik der Geo-Biosphäre},
      pid          = {G:(DE-Juel1)FUEK257},
      shelfmark    = {Plant Sciences},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000221249800009},
      doi          = {10.1071/FP03231},
      url          = {https://juser.fz-juelich.de/record/38398},
}