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@ARTICLE{PEUKE:280599,
      author       = {PEUKE, ANDREAS D. and WINDT, CAREL and VAN AS, HENK},
      title        = {{E}ffects of cold-girdling on flows in the transport phloem
                      in {R}icinus communis: is mass flow inhibited?},
      journal      = {Plant, cell $\&$ environment},
      volume       = {29},
      number       = {1},
      issn         = {1365-3040},
      address      = {Oxford [u.a.]},
      publisher    = {Wiley-Blackwell},
      reportid     = {FZJ-2016-00367},
      pages        = {15 - 25},
      year         = {2006},
      abstract     = {The effects of cold girdling of the transport phloem at the
                      hypocotyl of Ricinus communis on solute and water transport
                      were investigated. Effects on the chemical composition of
                      saps of phloem and xylem as well as of stem tissue were
                      studied by conventional techniques and the water flow in the
                      phloem was investigated by NMR imaging. Cold girdling
                      reduced the concentration of sucrose but not that of
                      inorganic solutes or amino acids in phloem saps. The
                      possibility that cold treatment inhibited the retrieval of
                      sucrose into the phloem, following leaching from the sieve
                      tubes along a chemical gradient is discussed. Leaching of
                      other solutes did not occur, as a result of missing
                      promoting gradients in stem tissue. Following 3 d of cold
                      girdling, sugar concentration increased and starch was
                      synthesized and accumulated in stem tissue above the cold
                      girdling region and along the cold-treated phloem pathway
                      due to leaching of sugars from the phloem. Only in the very
                      first period of cold girdling (< 15–30 min) was mass flow
                      inhibited, but recovered in the rest of cold treatment
                      period to values similar to the control period before and
                      the recovery period after the cold treatment. It is
                      concluded that cold treatment affected phloem transport
                      through two independent and reversible processes: (1) a
                      permanent leaching of sucrose from the phloem stem without
                      normal retrieval during cold treatment, and (2) a short-term
                      inhibition of mass flow at the beginning of cold treatment,
                      possibly involving P proteins. Possible further mechanisms
                      for reversible inhibition of water flow are discussed.},
      cin          = {IBG-2},
      ddc          = {570},
      cid          = {I:(DE-Juel1)IBG-2-20101118},
      pnm          = {899 - ohne Topic (POF3-899)},
      pid          = {G:(DE-HGF)POF3-899},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000233808100002},
      doi          = {10.1111/j.1365-3040.2005.01396.x},
      url          = {https://juser.fz-juelich.de/record/280599},
}