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@PHDTHESIS{Schneider:857939,
      author       = {Schneider, Hannah},
      title        = {{F}unctional {I}mplications of {R}oot {C}ortical
                      {S}enescence {F}or {S}oil {R}esource {C}apture},
      school       = {Pennsylvania State University},
      type         = {Dissertation},
      address      = {State College},
      publisher    = {Pennsylvania State University},
      reportid     = {FZJ-2018-06893},
      pages        = {1-219},
      year         = {2017},
      note         = {Dissertation, Pennsylvania State University, 2017},
      abstract     = {Root phenes play a primary role in plant adaptation to
                      edaphic stress. The identificationand understanding of the
                      functional implications of root phenes may enable breeding
                      and thedevelopment of crop varieties with improved soil
                      resource acquisition. Root cortical senescence(RCS) is a
                      type of programmed cell death in cortical cells of several
                      Triticeae species. Untilrecently there has been very little
                      attention as to the functional implications of RCS for water
                      andnutrient capture.My research used physiology studies in
                      the laboratory, greenhouse, and field and in
                      silicoexperiments to characterize the development of RCS and
                      understand its adaptive value and geneticcontrol. This
                      dissertation explores the functional implications of RCS for
                      water and nutrientcapture including its effects on root
                      respiration and radial water and nutrient transport.
                      Simulationresults suggest that RCS improves plant growth in
                      edaphic stress conditions. Empiricalexperiments demonstrated
                      its development of RCS is modulated by ethylene. RCS may be
                      a usefultrait for water and nutrient acquisition,
                      particularly in edaphic stress conditions.RCS may be an
                      adaptive trait for nutrient acquisition by reallocating
                      nutrients fromsenescing tissue and secondarily by reducing
                      root respiration. As RCS progresses, less metabolicresources
                      need to be invested in cortical maintenance, which could
                      permit greater resourceallocation to the growth of shoots,
                      other roots, and reproduction. These results suggest that
                      RCSmerits investigation as a breeding target for enhanced
                      soil resource acquisition and edaphic stresstolerance. The
                      development of crops with enhanced soil resource acquisition
                      would impact globalagriculture, since merits of RCS may be
                      analogous to other species which also form RCS
                      includingwheat, oats, and triticale.},
      cin          = {IBG-2},
      cid          = {I:(DE-Juel1)IBG-2-20101118},
      pnm          = {582 - Plant Science (POF3-582)},
      pid          = {G:(DE-HGF)POF3-582},
      typ          = {PUB:(DE-HGF)11},
      url          = {https://juser.fz-juelich.de/record/857939},
}