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@ARTICLE{Walter:31235,
      author       = {Walter, A. and Feil, J. P. and Schurr, U.},
      title        = {{E}xpansion dynamics, metabolite composition and substance
                      transfer of the primary root growth zone of {Z}ea mays {L}.
                      grown in different external nutrient availabilities},
      journal      = {Plant, cell $\&$ environment},
      volume       = {26},
      issn         = {0140-7791},
      address      = {Oxford [u.a.]},
      publisher    = {Wiley-Blackwell},
      reportid     = {PreJuSER-31235},
      pages        = {1451 - 1466},
      year         = {2003},
      note         = {Record converted from VDB: 12.11.2012},
      abstract     = {A combined analysis of growth and metabolite composition
                      was performed in primary roots of Zea mays L. (Var.
                      Alexander). The seedlings were hydroponically cultivated
                      either in pure water or in complete nutrient solution. The
                      overall root growth performance was similar in both
                      treatments. Yet, digital image sequence processing methods
                      resolved, that growth distribution and oscillatory movements
                      within the growth zone depended strongly on external
                      nutrient availability. Metabolite concentration profiles
                      were similar in both treatments for most investigated
                      metabolites, indicating a thorough mobilization of nutrient
                      resources from the seed, but concentrations of glutamine,
                      glutamic acid, NO3-, NH4+, malate and citrate showed
                      pronounced differences between treatments. No diurnal
                      variations in metabolite concentrations were found.
                      Deposition rate profiles were in general more similar to
                      relative elemental growth rate profiles than concentration
                      profiles and were not affected by the treatment. Major ions
                      were deposited maximally in front of the centre of growth
                      activity, while greatest hexose deposition was found behind
                      that. Relative to their abundance in the root growth zone,
                      net rates of transfer from mature tissue were highest for
                      sucrose, glutamic acid and aspartic acid, whereas glucose,
                      fructose and most amino acids inversely showed high net
                      rates of transfer out of the root growth zone, indicating a
                      high catabolic rate for those substances there. NO3-, but
                      not other nutrients, was transferred to a great extent from
                      the root growth zone to the mature tissue in nutrient
                      solution. Overall, the results show, that a careful analysis
                      of growth dynamics allows quantifying and interpreting a
                      number of important flux parameters in the growing organ and
                      that the performance of the primary root does not depend
                      strongly on external nutrient availability.},
      keywords     = {J (WoSType)},
      cin          = {ICG-III},
      ddc          = {570},
      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:000185085100004},
      doi          = {10.1046/j.0016-8025.2003.01068.x},
      url          = {https://juser.fz-juelich.de/record/31235},
}