Table 1. List of previously determined extinction coefficients for the acetyl bromide soluble lignin method of lignin quantification.

Specimen	Extinction Coefficient (g-1 L cm-1)	Reference
Arabidopsis thaliana, various ecotypes, stem tissues	23.35	Chang et al. (2008)
Poplar (Populus sp.)	18.21	Foster et al. (2010)
Arabidopsis thaliana, alternative	15.69	Foster et al. (2010)
Grasses	17.75	Foster et al. (2010)
Brachypodium distachyon	18.126	Fukushima and Hatfield (2004)
Zea mays	17.747	Fukushima and Hatfield (2004)
Medicago sativa, whole plant mean	14.23	Fukushima and Hatfield (2004)
Trifolium pretense L., Red clover	14.49	Fukushima and Hatfield (2004)
Bromus inermis Leyss., Bromegrass boot stage; anthesis; postseed stems	17.11; 16.73; 17.40, respectively	Fukushima and Hatfield (2004)
Avena sativa L., oat straw leaf; stem	20.10; 18.91, respectively	Fukushima and Hatfield (2004)
Triticum aestivum L., wheat straw leaf; stem	19.81; 17.54, respectively	Fukushima and Hatfield (2004)