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@ARTICLE{Gould:904498,
      author       = {Gould, Nick and Thorpe, Michael R. and Taylor, Joe T. and
                      Boldingh, Helen L. and McKenzie, Catherine M. and Reglinski,
                      Tony},
      title        = {{A} {J}asmonate-{I}nduced {D}efense {E}licitation in
                      {M}ature {L}eaves {R}educes {C}arbon {E}xport and {A}lters
                      {S}ink {P}riority in {G}rape ({V}itis vinifera
                      {C}hardonnay)},
      journal      = {Plants},
      volume       = {10},
      number       = {11},
      issn         = {2223-7747},
      address      = {Basel},
      publisher    = {MDPI},
      reportid     = {FZJ-2021-06068},
      pages        = {2406 -},
      year         = {2021},
      abstract     = {This work aims to understand how Vitis vinifera
                      (Chardonnay) vines prioritise the export and distribution of
                      recently fixed photoassimilate between root tissue, fruit,
                      and defence, following the elicitation of a defence
                      response. Jasmonic acid (JA) and its methyl ester, MeJA, are
                      endogenous plant hormones, known collectively as jasmonates,
                      that have signalling roles in plant defence and consequently
                      are often used to prime plant defence systems. Here, we use
                      exogenous jasmonate application to mature source leaves of
                      Chardonnay grapevines to elucidate the prioritisation
                      strategy of carbon allocation between plant defence and
                      growth. Our results demonstrate that jasmonate application
                      to Chardonnay leaves can elicit a defence response to
                      Botrytis cinerea, but the effect was localised to the
                      jasmonate-treated area. We found no evidence of a systemic
                      defence response in non-treated mature leaves or young
                      growing tissue. JA application reduced the photosynthetic
                      rate of the treated leaf and reduced the export rate of
                      recently fixed carbon-11 from the leaf. Following JA
                      application, a greater proportion of available recently
                      fixed carbon was allocated to the roots, suggesting an
                      increase in sink strength of the roots. Relative sink
                      strength of the berries did not change; however, an increase
                      in berry sugar was observed seven days after JA treatment.
                      We conclude that the data provide evidence for a “high
                      sugar resistance” model in the mature treated leaves of
                      the vine, since the export of carbon was reduced to ensure
                      an elevated defence response in the treated leaf. The
                      increase in berry sugar concentration seven days after
                      treatment can be explained by the initial prioritisation of
                      a greater portion of the exported carbon to storage in the
                      roots, making it available for remobilisation to the berries
                      once the challenge to defence had passed.},
      cin          = {IBG-2},
      ddc          = {580},
      cid          = {I:(DE-Juel1)IBG-2-20101118},
      pnm          = {2171 - Biological and environmental resources for
                      sustainable use (POF4-217)},
      pid          = {G:(DE-HGF)POF4-2171},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {34834769},
      UT           = {WOS:000727252700001},
      doi          = {10.3390/plants10112406},
      url          = {https://juser.fz-juelich.de/record/904498},
}