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@ARTICLE{Thorpe:8364,
      author       = {Thorpe, M.R. and Furch, A.C.U. and Minchin, P.E.H. and
                      Föller, J. and Van Bel, A.J.E. and Hafke, J.B.},
      title        = {{R}apid cooling triggers forisome dispersion just before
                      phloem transport stops},
      journal      = {Plant, cell $\&$ environment},
      volume       = {33},
      issn         = {0140-7791},
      address      = {Oxford [u.a.]},
      publisher    = {Wiley-Blackwell},
      reportid     = {PreJuSER-8364},
      pages        = {259 - 271},
      year         = {2010},
      note         = {We were supported by the Deutsche Forschungsgemeinschaft in
                      the frame of the Schwerpunktprogramm 1108 (BE 1925/8-2, 8-3,
                      15-1) and by the Marsden Fund of New Zealand (Contract
                      Number UOW003). We acknowledge Gerhard Roeb, Siegfried
                      Jahnke and Marco Dautzenberg for discussions and technical
                      assistance in Julich, and Werner Uhmann, Thomas Wagner,
                      Andreas Reh and Stefan Balser in Giessen for expert workshop
                      assistance in Giessen.},
      abstract     = {Phloem transport stops transiently within dicot stems that
                      are cooled rapidly, but the cause remains unknown. Now it is
                      known that (1) rapid cooling depolarizes cell membranes
                      giving a transient increase in cytoplasmic Ca(2+), and (2) a
                      rise of free calcium triggers dispersion of forisomes, which
                      then occlude sieve elements (SEs) of fabacean plants.
                      Therefore, we compared the effects of rapid chilling on SE
                      electrophysiology, phloem transport and forisomes in Vicia
                      faba. Forisomes dispersed after rapid cooling with a delay
                      that was longer for slower cooling rates. Phloem transport
                      stopped about 20 s after forisome dispersion, and then
                      transport resumed and forisomes re-condensed within similar
                      time frames. Transport interruption and forisome dispersion
                      showed parallel behaviour--a cooling rate-dependent
                      response, transience and desensitization. Chilling induced
                      both a fast and a slow depolarization of SE membranes, the
                      electrical signature suggesting strongly that the cause of
                      forisome dispersion was the transient promotion of SE free
                      calcium. This apparent block of SEs by dispersed forisomes
                      may be assisted by other Ca(2+)-dependent sealing proteins
                      that are present in all dicots.},
      keywords     = {Calcium: metabolism / Carbon Isotopes: analysis / Cold
                      Temperature / Electrophysiology / Fluorescent Dyes /
                      Membrane Potentials / Microelectrodes / Microscopy, Confocal
                      / Phloem: physiology / Vicia faba: physiology / Carbon
                      Isotopes (NLM Chemicals) / Fluorescent Dyes (NLM Chemicals)
                      / Calcium (NLM Chemicals) / J (WoSType)},
      cin          = {ICG-3},
      ddc          = {570},
      cid          = {I:(DE-Juel1)ICG-3-20090406},
      pnm          = {Terrestrische Umwelt},
      pid          = {G:(DE-Juel1)FUEK407},
      shelfmark    = {Plant Sciences},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {pmid:19930129},
      UT           = {WOS:000273551100010},
      doi          = {10.1111/j.1365-3040.2009.02079.x},
      url          = {https://juser.fz-juelich.de/record/8364},
}