Figure 11 : Exploring the mechanism of leaf bulk cell
wall O-acetylation. Simplified schematic showing acetate and its
four-stable carbon isotopologues with 0 (A ), 1 (B andC ), and 2 (D ) 13C atoms. Following
delivery of a 10 mM 13C2-acetate to
detached poplar branches and a whole poplar tree via the transpiration
stream, leaf cell walls were isolated and analyzed by1H-NMR. Note: the much more intense12C2-isotopologue signal (A) was
clipped vertically in both control and13C2-acetate spectra to show the
details of the satellite peaks corresponding to the remaining
isotopologues which are labeled B-D.