Table 2. Pyrolysis-GCMS-derived rough estimation of lignin composition in the root infection sites of the resistant cultivar ‘Nipponbare’ and the susceptible cultivar ‘Koshihikari’ in control and S. hermonthica-infected plants.

Data are calculated by sum of integral peaks from each lignin-type product listed in Table 1 (excluding 4-vinylphenol, 4-phenolguaiacol, and 2,6-dimethoxyl-4-vinylphenol, which can be derived from cell-wall–bound cinnamates). Means ± se (se) of three biological replications (each of which contained a pool of two to five plants) are shown. Values in parentheses are percentage to the total of H + G + S products. H-products may include phenols originated from cell wall proteins (see text). Student’s t test: *P < 0.05, **P < 0.01; comparing control and Striga-infected plants.

Lignin Polymer Unit	Nipponbare		Koshihikari
	Control	Striga-infected	Control	Striga-infected
H	1,724,625 ± 33,128	2,837,829 ± 137,589**	2,132,501 ± 260,861	2,317,594 ± 139,525
(%)	(42.8 ± 0.4)	(36.0 ± 1.9)	(40.4 ± 1.9)	(37.9 ± 0.2)
G	1,336,152 ± 21,558	2,743,496 ± 275,218*	1,798,957 ± 312,049	144,959 ± 117,937
(%)	(33.1 ± 0.3)	(34.4 ± 0.7)	(33.4 ± 0.5)	(35.1 ± 0.4)*
S	971,234 ± 8,196	2,361,291 ± 270,431*	1,425,754 ± 293,902	1,650,304 ± 137,044
(%)	(24.1 ± 0.4)	(29.6 ± 1.2)*	(26.2 ± 1.4)	(26.9 ± 0.5)
S/G	0.73 ± 0.02	0.86 ± 0.02**	0.78 ± 0.03	0.77 ± 0.02