Fig. 6. ³⁵S content of new and mature leaf fractions. (A) Distribution of ³⁵S components between the mature and expanding leaf fraction (3 open and expanding leaves, and any leaf buds) for plants pulsed at DAI 65 of Exp. 2. (B) Radiosulfur distribution in plants pulsed at DAI 98. Plots are additive, so that the top line represents the total ³⁵S in both leaf fractions. Values represent means ± SE (n = 4). DAI = days after imbibition.