
TY  - JOUR
A1  - Barbour, Margaret M. 
A1  - Andrews, T. John 
A1  - Farquhar, Graham D. 
T1  - Correlations between oxygen isotope ratios of wood constituents of <emph type="2">Quercus</emph> and <emph type="2">Pinus</emph> samples from around the world
JF  - Functional Plant Biology
JO  - Functional Plant Biol.
Y1  - 2001
VL  - 28
IS  - 5
SP  - 335
EP  - 348
KW  - 
UR  - https://doi.org/10.1071/PP00083 
N2  - The oxygen isotope compositions of three wood constituents (the solvent-extractable portion, lignin and &#945;-cellulose) were measured for samples collected from Quercus and Pinus trees around the world. Among Pinus samples all wood constituents were positively related to modelled &#948;18O of source water at the site, while among Quercus samples whole wood, lignin and &#945;-cellulose showed positive relationships. The data support the hypothesis that many oxygen atoms in lignin exchanged with unenriched stem water during synthesis, rather than retaining the full isotopic signal from the molecular oxygen added during hydroxylation of the aromatic ring. The data also suggest that extraction of &#945;-cellulose from wood samples is unnecessary for isotope studies looking at correlations with site parameters. 
ER  -

