Figure 2.

δ13C values of sucrose* (a) and bulk needle material (b) of 2-year-old pine branches, placed in light (thin lines) and dark (thick lines) chambers during the vegetation period in summer 2006. Stars mark the sharp peaks on the δ13C curves. Dotted lines mark the halves of growing period in the light (gray) and dark chambers (black). *Water soluble organic fraction consisted of ≥97 % sucrose. Data is shown as mean values ± SD (n ≥ 3)

Voronin et al. BMC Plant Biology 2012 12:76   doi:10.1186/1471-2229-12-76
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