Table 3.

Average lignin content (±standard error) in the dry matter of wall material (μg mg⁻¹) extracted by the acetyl bromide method (Fukushima and Hatfield, 2001; Foster et al., 2010).

	Lignin content
Populus nigra wood	199.2
Pericarp and pedicel 5 DAP	80.5 ± 13.2
Transfer cells 10 DAP	46.4 ± 14.8
Starchy cells 10 DAP	47.9 ± 9.7
Transfer cells 15 DAP	38.0 ± 10.0
Starchy cells 15 DAP	36.9 ± 12.4