Table I.

Free/total-PA ratios in the hypergeous organs of the tobacco plant

S-Put/total S-PAs, S-Spd/total S-PAs, and S-Spm/total S-PAs ratios were determined in shoot apex and in the first, 10th, and 25th (numbered from shoot apex) leaves. Data are the means ± se.

	S-Put/Total S-PAs	S-Spd/Total S-PAs	S-Spm/Total S-PAs
Shoot apex	0.39 ± 0.02	0.42 ± 0.03	0.18 ± 0.01
First leaf	0.40 ± 0.02	0.45 ± 0.02	0.15 ± 0.01
10th leaf	0.26 ± 0.01	0.61 ± 0.04	0.13 ± 0.00
25th leaf	0.21 ± 0.01	0.72 ± 0.05	0.07 ± 0.00