Table 2.

Maximum fluorescence intensity and corresponding excitation (λ_EX) and emission (λ_EM) wavelengths of untreated (UN) and pretreated samples from Fig. 1 and Supplementary Figs 1 and 2.

	Miscanthus			Poplar			Wheat straw
	Maximum fluorescence intensity	λEX (nm)	λEM (nm)	Maximum fluorescence intensity	λEX (nm)	λEM (nm)	Maximum fluorescence intensity	λEX (nm)	λEM (nm)
UN	8100	366	436	8307	376	445	7536	358	441
CSF 2.0	2450	360	428	3225	358	416	5086	352	424
CSF 2.6	1480	356	420	1862	360	422	3921	348	422
CSF 2.7	1462	358	426	ND	ND	ND	4030	352	422
CSF 2.8	1342	354	421	1409	358	418	3994	352	417
ΔCSF 2.8/UN	−84%	−12	−15	−83%	−18	−27	−47%	−6	−24

Standard deviations from fluorescence intensity measurements done in triplicate are below 5%. Δ_{CSF 2.8/UN}: variation between pretreated sample with CSF 2.8 and untreated sample.