Table II.

Lignin-derived monomers (H, G, and S) after thioacidolysis of leaves from poplars cultivated under control conditions or fumigated for 34 d with 60 or 120 nL L^-1 ozone

Four trees were grown for each culture condition, and the data represent the mean value and sd for these four replicates. The normalized values relative to the control are shown in parentheses.

Culture Condition	Yield in H + G + S Monomers	Monomer
		H	G	S
	μmol g-1 lignin		% (w/w)
Control	551 ± 22 (100)	1.4 ± 0.2 (100)	60.8 ± 0.7	37.8 ± 0.7
Ozone, 60 nL L-1	418 ± 72 (76)	3.5 ± 0.2 (250)	60.4 ± 0.9	36.1 ± 2.1
Ozone, 120 nL L-1	368 ± 41 (67)	4.9 ± 1 (350)	61.5 ± 2.2	33.6 ± 3.2