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@ARTICLE{Poir:9495,
      author       = {Poiré, R. and Schneider, H. and Thorpe, M.R. and Kuhn, A.
                      J. and Schurr, U. and Walter, A.},
      title        = {{R}oot cooling strongly affects diel leaf growth
                      dynamics,water and carbohydrate relations in {R}icinus
                      communis},
      journal      = {Plant, cell $\&$ environment},
      volume       = {33},
      issn         = {0140-7791},
      address      = {Oxford [u.a.]},
      publisher    = {Wiley-Blackwell},
      reportid     = {PreJuSER-9495},
      pages        = {408 - 417},
      year         = {2010},
      note         = {We thank Beate Uhlig for her support during the breeding of
                      the plants. Richard Poire thanks the International Helmholtz
                      Research School of Biophysics and Soft Matter for the
                      stimulating discussions emerging from this interdisciplinary
                      study, and acknowledges the support of his PhD thesis at the
                      Heinrich-Heine-Universitat Dusseldorf.},
      abstract     = {In laboratory and greenhouse experiments with potted
                      plants, shoots and roots are exposed to temperature regimes
                      throughout a 24 h (diel) cycle that can differ strongly from
                      the regime under which these plants have evolved. In the
                      field, roots are often exposed to lower temperatures than
                      shoots. When the root-zone temperature in Ricinus communis
                      was decreased below a threshold value, leaf growth occurred
                      preferentially at night and was strongly inhibited during
                      the day. Overall, leaf expansion, shoot biomass growth, root
                      elongation and ramification decreased rapidly, carbon fluxes
                      from shoot to root were diminished and carbohydrate contents
                      of both root and shoot increased. Further, transpiration
                      rate was not affected, yet hydrostatic tensions in shoot
                      xylem increased. When root temperature was increased again,
                      xylem tension reduced, leaf growth recovered rapidly, carbon
                      fluxes from shoot to root increased, and carbohydrate pools
                      were depleted. We hypothesize that the decreased uptake of
                      water in cool roots diminishes the growth potential of the
                      entire plant - especially diurnally, when the growing leaf
                      loses water via transpiration. As a consequence, leaf growth
                      and metabolite concentrations can vary enormously, depending
                      on root-zone temperature and its heterogeneity inside pots.},
      keywords     = {Carbohydrate Metabolism / Carbon: metabolism / Circadian
                      Rhythm / Cold Temperature / Plant Leaves: growth $\&$
                      development / Plant Roots: growth $\&$ development / Plant
                      Roots: physiology / Plant Transpiration / Ricinus: growth
                      $\&$ development / Ricinus: metabolism / Ricinus: physiology
                      / Water: physiology / Xylem: physiology / Carbon (NLM
                      Chemicals) / Water (NLM Chemicals) / J (WoSType)},
      cin          = {ICG-3 / JARA-ENERGY},
      ddc          = {570},
      cid          = {I:(DE-Juel1)ICG-3-20090406 / $I:(DE-82)080011_20140620$},
      pnm          = {Terrestrische Umwelt},
      pid          = {G:(DE-Juel1)FUEK407},
      shelfmark    = {Plant Sciences},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {pmid:19968824},
      UT           = {WOS:000274412500009},
      doi          = {10.1111/j.1365-3040.2009.02090.x},
      url          = {https://juser.fz-juelich.de/record/9495},
}