Deriving correlated climate and physiological signals from deuterium isotopomers in tree rings (Articolo in rivista)

Type
Label
  • Deriving correlated climate and physiological signals from deuterium isotopomers in tree rings (Articolo in rivista) (literal)
Anno
  • 2008-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1016/j.chemgeo.2008.01.011 (literal)
Alternative label
  • Augusti, Angela; Betson, Tatiana R.; Schleucher, Jurgen (2008)
    Deriving correlated climate and physiological signals from deuterium isotopomers in tree rings
    in Chemical geology
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Augusti, Angela; Betson, Tatiana R.; Schleucher, Jurgen (literal)
Pagina inizio
  • 1 (literal)
Pagina fine
  • 8 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 252 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali
  • 8 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo
  • 1-2 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Umea University; Umea University (literal)
Titolo
  • Deriving correlated climate and physiological signals from deuterium isotopomers in tree rings (literal)
Abstract
  • The deuterium (D) abundance of tree-ring cellulose archives past climatic conditions, but previous attempts to access this archive have led to conflicting results. Based on an overview of D fractionation mechanisms in plants, we explain why past measurements of D abundance yield unreliable paleo signals. Our data show that variation in D abundance among the C-H groups (isotopomer variation) of tree-ring cellulose is generally greater than variation in D abundance due to climatic influences. A comparison of the D isotopomer abundances of soluble sugars of annual plants and of trees, and of tree-ring cellulose shows that an \"isotopomer pattern\" of the C-3 photosynthetic pathway is transmitted from soluble sugars to tree-ring cellulose. Differences in this pattern between oaks and conifers appear to be related to differences in metabolism. Furthermore, the patterns are modified by hydrogen isotope exchange between C-H groups and source water during cellulose synthesis. Based on these results, we propose a strategy to simultaneously reconstruct climate signals and signals related to tree physiology from D isotopomers of tree rings. Combination of climate signals and physiological signals may allow the detection of century-time-scale adaptations of trees to past environmental change, and help to forecast future adaptations. (C) 2008 Elsevier B.V. All rights reserved. (literal)
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