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@ARTICLE{Bcking:61035,
      author       = {Bücking, H. and Kuhn, A. J. and Schröder, W. H. and
                      Heyser, W.},
      title        = {{T}he fungal sheath of ectomycorrhizal pine roots : an
                      apoplastic barrier for the entry of calcium, magnesium, and
                      potassium into the root cortex?},
      journal      = {The journal of experimental botany},
      volume       = {53},
      issn         = {0022-0957},
      address      = {Oxford},
      publisher    = {Univ. Press},
      reportid     = {PreJuSER-61035},
      pages        = {1659 - 1669},
      year         = {2002},
      note         = {Record converted from VDB: 12.11.2012},
      abstract     = {The apoplastic permeability of the fungal sheath of two
                      different ectomycorrhizal associations of Pinus sylvestris
                      L. was analysed by laser microprobe mass analysis (LAMMA)
                      and energy-dispersive X-ray spectroscopy (EDXS) after stable
                      isotope labelling with Mg-25, K-41 and Ca-44. Entry of Mg-25
                      and Ca-41 into the outer cortical apoplast of
                      non-mycorrhizal roots was detected after 4 min of labelling.
                      After a longer exposure time the endodermis with its
                      Casparian band acted as an efficient apoplastic diffusion
                      barrier for the radial movement of Mg-25 and Ca-44 into the
                      stele. A fraction of approximately one-third of the
                      apoplastic cations of the root cortex could not be exchanged
                      against the external label even after longer exposure times.
                      The ectomycorrhizal sheath of the two fungal species used,
                      Pisolithus tinctorius (Pers.) Coker $\&$ Couch and Suillus
                      bovinus (L. ex Fr.) Kuntze, does not completely inhibit the
                      apoplastic movement of ions into the mycorrhizal root
                      cortex, but retarded the penetration of isotopes into the
                      cortical apoplast. In roots inoculated with S. bovinus, a
                      clear labelling of the cortical apoplast could first be
                      detected after 24 h of exposure to the stable isotope
                      solution. At this time the labelling of the cortical
                      apoplast in these mycorrhizal roots was higher than those of
                      non-mycorrhizal roots and, with EDXS, changes in the element
                      composition of the apoplast were detected. The results
                      indicated that possibly hydrophobins localized in the fungal
                      cell wall might be involved in the increased hydrophobicity
                      of mycorrhizal roots and the lower permeability of the
                      ectomycorrhizal sheath.},
      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:000176946500014},
      doi          = {10.1093/jxb/erf011},
      url          = {https://juser.fz-juelich.de/record/61035},
}