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@ARTICLE{Duan:866217,
      author       = {Duan, Qiuxiao and Kleiber, Anita and Jansen, Kirstin and
                      Junker, Laura and Kammerer, Bernd and Han, Gang and Zimmer,
                      Ina and Rennenberg, Heinz and Schnitzler, Jörg-Peter and
                      Ensminger, Ingo and Gessler, Arthur and Kreuzwieser,
                      Jürgen},
      title        = {{E}ffects of elevated growth temperature and enhanced
                      atmospheric vapour pressure deficit on needle and root
                      terpenoid contents of two {D}ouglas fir provenances},
      journal      = {Environmental and experimental botany},
      volume       = {166},
      issn         = {0098-8472},
      address      = {Amsterdam [u.a.]},
      publisher    = {Elsevier Science},
      reportid     = {FZJ-2019-05384},
      pages        = {103819},
      year         = {2019},
      abstract     = {In the present work, we studied the effects of elevated air
                      temperatures, which were above the optimum for
                      photosynthesis, in combination with enhanced atmospheric VPD
                      on two Douglas fir provenances grown under controlled
                      conditions in a climate chamber. Provenance Monte Creek (MC)
                      from the menziesii-glauca transition zone, Southern British
                      Columbia, Canada, was derived from a dry environment
                      receiving ca. half of the precipitation at its natural site
                      than the interior provenance Pend Oreille (PO) from a mesic
                      site in Northeast Washington State, US. We determined the
                      terpenoid contents in needles and roots of the trees as well
                      as terpene emission from needles and terpenoid synthase
                      activities observing clear provenance-specific patterns.
                      Whereas total terpenoid contents in needles dropped
                      significantly in provenance PO in response to thermal
                      stress, they remained unaffected in MC. The drop in
                      terpenoid content in PO was due to decreased abundance of
                      almost all identified terpenoids with exception of five
                      compounds. Terpene emission was significantly enhanced in
                      thermal-stressed provenance MC but it was unaffected in
                      provenance PO. Oppositely, root terpenoid contents were
                      rather stable in both provenances upon high temperature and
                      enhanced atmospheric VPD. Similarly, we did not observe
                      stress effects on terpenoid synthase activity, which was
                      used as a proxy for the formation of terpenoids. The results
                      indicate that features of the original habitat of the trees
                      determine plant chemotypic properties, for example, thermal
                      stress related responses. The observed decrease of terpenoid
                      levels in needles of PO after long-term exposure to elevated
                      temperature/enhanced atmospheric VPD, might weaken
                      stress-exposed trees. Since terpenoids are essential
                      components of the conifers’ defense arsenal against
                      herbivores, decreased terpenoid levels might increase
                      susceptibility of stressed trees to above- and belowground
                      herbivore challenges.},
      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:000482246100019},
      doi          = {10.1016/j.envexpbot.2019.103819},
      url          = {https://juser.fz-juelich.de/record/866217},
}