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@ARTICLE{Schneider:834662,
      author       = {Schneider, Hannah and Postma, Johannes Auke and
                      Wojciechowski, Tobias and Kuppe, Christian and Lynch,
                      Jonathan},
      title        = {{R}oot {C}ortical {S}enescence {I}mproves {G}rowth under
                      {S}uboptimal {A}vailability of {N}, {P}, and {K}},
      journal      = {Plant physiology},
      volume       = {174},
      number       = {4},
      issn         = {1532-2548},
      address      = {Rockville, Md.},
      publisher    = {Soc.},
      reportid     = {FZJ-2017-04566},
      pages        = {2333–2347},
      year         = {2017},
      abstract     = {Root cortical senescence (RCS) in Triticeae reduces
                      nutrient uptake, nutrient content, respiration, and radial
                      hydraulic conductance of root tissue. We used the
                      functional-structural model SimRoot to evaluate the
                      functional implications of RCS in barley (Hordeum vulgare)
                      under suboptimal nitrate, phosphorus, and potassium
                      availability. The utility of RCS was evaluated using
                      sensitivity analyses in contrasting nutrient regimes. At
                      flowering (80 d), RCS increased simulated plant growth by up
                      to $52\%,$ $73\%,$ and $41\%$ in nitrate-, phosphorus-, and
                      potassium-limiting conditions, respectively. Plants with RCS
                      had reduced nutrient requirement of root tissue for optimal
                      plant growth, reduced total cumulative cortical respiration,
                      and increased total carbon reserves. Nutrient reallocation
                      during RCS had a greater effect on simulated plant growth
                      than reduced respiration or nutrient uptake. Under low
                      nutrient availability, RCS had greater benefit in plants
                      with fewer tillers. RCS had greater benefit in phenotypes
                      with fewer lateral roots at low nitrate availability, but
                      the opposite was true in low phosphorus or potassium
                      availability. Additionally, RCS was quantified in
                      field-grown barley in different nitrogen regimes. Field and
                      virtual soil coring simulation results demonstrated that
                      living cortical volume per root length (an indicator of RCS)
                      decreased with depth in younger plants, while roots of older
                      plants had very little living cortical volume per root
                      length. RCS may be an adaptive trait for nutrient
                      acquisition by reallocating nutrients from senescing tissue
                      and secondarily by reducing root respiration. These
                      simulated results suggest that RCS merits investigation as a
                      breeding target for enhanced soil resource acquisition and
                      edaphic stress tolerance.},
      cin          = {IBG-2},
      ddc          = {580},
      cid          = {I:(DE-Juel1)IBG-2-20101118},
      pnm          = {582 - Plant Science (POF3-582)},
      pid          = {G:(DE-HGF)POF3-582},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000406865900028},
      pubmed       = {pmid:28667049},
      doi          = {10.1104/pp.17.00648},
      url          = {https://juser.fz-juelich.de/record/834662},
}