Figure 5.

a) δ¹³C course of 1-year old bulk needle material (thin line), cellulose of 1-year-old (dotted black line) and 2–year-old (thick black line) twigs and phloem sucrose* (thick gray line) in the light during the vegetation period 2006; b) δ¹³C course of needle sucrose (thick gray line) and proteins (thick black line) in the light chamber during the vegetation period 2006. Dotted gray lines mark the halves of growing period. *Water soluble organic fraction consisted of ≥97 % sucrose. Data is shown as mean values ± SD (n ≥ 3)