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@ARTICLE{Walter:28041,
      author       = {Walter, A. and Feil, J. P. and Schurr, U.},
      title        = {{R}estriction of nyctinastic movements and application of
                      tensile forces to leaves affects diurnal patterns of
                      expansion growth},
      journal      = {Functional plant biology},
      volume       = {29},
      issn         = {1445-4408},
      address      = {Collingwood, Victoria},
      publisher    = {CSIRO Publ.},
      reportid     = {PreJuSER-28041},
      pages        = {1247 - 1258},
      year         = {2002},
      note         = {Record converted from VDB: 12.11.2012},
      abstract     = {Leaves of Ricinus communis L. show strong nyctinastic
                      movements as well as diurnal variations of growth activity,
                      combined with prominent basipetal gradients of relative
                      growth rate. A novel technique, using digital image sequence
                      processing, is able to resolve such spatio-temporal patterns
                      of leaf growth with high resolution. In this paper we
                      analyse the impact of prevention of nyctinastic movements,
                      and the potential of tensile forces to overcome the
                      retarding effects. Tensile forces affected leaf expansion
                      and tissue expansibility in a dose-response relation. In a
                      comparison with freely-growing leaves, an appropriate,
                      optimal tensile force was identified that rebuilt the
                      natural diurnal course of leaf expansion. With this tensile
                      force, undisturbed patterns of temporal and spatial growth
                      distribution as well as undisturbed concentrations of major
                      cations, amino acids or soluble sugars were observed.
                      However, diurnal fluctuations in starch content of almost
                      fully-grown leaves were affected by the treatment and could
                      not be compensated by tensile forces. This effect might
                      point to a connection between diurnal growth variations of
                      the leaf vein, biomechanical forces that synchronize growth
                      within the vein, and metabolism of carbohydrates as growth
                      substrates of the vein. We therefore hypothesize that
                      interveinal tensions, which are produced during nyctinastic
                      leaf movements, are (i) required for undisturbed leaf growth
                      and (ii) can be simulated by application of adequate tensile
                      forces.},
      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:000179392100001},
      doi          = {10.1071/PP01255},
      url          = {https://juser.fz-juelich.de/record/28041},
}