Table 4.

FTIR relative peak intensity ratio.

Sample	Relative peak intensity ratio
	I1507/I1425	I1507/I1382	I1507/I895	I1507/I1158	I1507/I1745
Non-modified poplar	1.152 ± 0.038 A	1.077 ± 0.056 A	2.770 ± 0.228 A	0.835 ± 0.042 AB	0.373 ± 0.015 A
C3H transgenic poplar	1.399 ± 0.153 B	1.016 ± 0.047 B	2.147 ± 0.147 B	0.809 ± 0.104 A	0.383 ± 0.024 A
HCT transgenic poplar	1.418 ± 0.010 B	1.011 ± 0.065 B	2.154 ± 0.173 B	0.907 ± 0.115 B	0.366 ± 0.038 A
P-value	1.44 × 10−6	0.024	3.41 × 10−11	0.007	0.332