Table II.

Amount and carbon isotope composition (δ¹³C) of starch from detached leaves supplied with ¹³C-enriched Glc (δ¹³C 5,500‰) or ¹³C-enriched Pyr (δ¹³C 2,500‰), 15 mmol L⁻¹ for 2 h in the light with 350 μL L⁻¹ CO₂ at −51‰ (see Fig. 1) after 1 h in the light without feeding

Data are mean and sd of three independent measurements.

Conditions	Amount	δ13C
	μg mg−1 fresh weight	‰
Control (greenhouse)	13.1 ± 5.3	−28.5 ± 0.5
No feeding	15.1 ± 5.0	−31.4 ± 1.3
13C1-Glc	15.0 ± 3.3	−1.9 ± 9.0
13C3-Glc	13.6 ± 2.9	−9.0 ± 9.5
13C1-Pyr	11.7 ± 5.4	−16.5 ± 3.4
13C2-Pyr	12.2 ± 3.2	−29.9 ± 1.6