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@ARTICLE{JunkerFrohn:868356,
      author       = {Junker-Frohn, Laura Verena and Kleiber, Anita and Jansen,
                      Kirstin and Gessler, Arthur and Kreuzwieser, Jürgen and
                      Ensminger, Ingo},
      title        = {{D}ifferences in isoprenoid-mediated energy dissipation
                      pathways between coastal and interior {D}ouglas-fir
                      seedlings in response to drought},
      journal      = {Tree physiology},
      volume       = {39},
      number       = {10},
      issn         = {1758-4469},
      address      = {Victoria, BC},
      publisher    = {Heron},
      reportid     = {FZJ-2019-06885},
      pages        = {1750 - 1766},
      year         = {2019},
      abstract     = {Plants have evolved energy dissipation pathways to reduce
                      photooxidative damage under drought when photosynthesis is
                      hampered. Non-volatile and volatile isoprenoids are involved
                      in non-photochemical quenching of excess light energy and
                      scavenging of reactive oxygen species. A better
                      understanding of trees’ ability to cope with and withstand
                      drought stress will contribute to mitigate the negative
                      effects of prolonged drought periods expected under future
                      climate conditions. Therefore we investigated if Douglas-fir
                      (Pseudotsuga menziesii(Mirb.)) provenances from habitats
                      with contrasting water availability reveal intraspecific
                      variation in isoprenoid-mediated energy dissipation
                      pathways. In a controlled drought experiment with 1-year-old
                      seedlings of an interior and a coastal Douglas-fir
                      provenance, we assessed the photosynthetic capacity, pool
                      sizes of non-volatile isoprenoids associated with the
                      photosynthetic apparatus, as well as pool sizes and emission
                      of volatile isoprenoids. We observed variation in the amount
                      and composition of non-volatile and volatile isoprenoids
                      among provenances, which could be linked to variation in
                      photosynthetic capacity under drought. The coastal
                      provenance exhibited an enhanced biosynthesis and emission
                      of volatile isoprenoids, which is likely sustained by
                      generally higher assimilation rates under drought. In
                      contrast, the interior provenance showed an enhanced
                      photoprotection of the photosynthetic apparatus by generally
                      higher amounts of non-volatile isoprenoids and increased
                      amounts of xanthophyll cycle pigments under drought. Our
                      results demonstrate that there is intraspecific variation in
                      isoprenoid-mediated energy dissipation pathways among
                      Douglas-fir provenances, which may be important traits when
                      selecting provenances suitable to grow under future climate
                      conditions.},
      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},
      pubmed       = {pmid:31287896},
      UT           = {WOS:000509482600009},
      doi          = {10.1093/treephys/tpz075},
      url          = {https://juser.fz-juelich.de/record/868356},
}