Fig. 7

Alteration of major wall polymer features after three optimal pretreatments in four typical pairs of Miscanthus accessions. a Cellulose CrI (%); b cellulose DP; c xylose of hemicelluloses (% of total); d X/A ratio of hemicelluloses, and e three lignin monomers (µmol/g). Raw as raw materials without pretreatment. The line and square within the box presented the median and mean values of all data (n = 32); the bottom and top edges of the box indicated 25 and 75 percentiles of all data; the top and bottom bars (×) presented maximum and minimum values of all data, and the different letters (a, b, c, d) indicated that the mean values are significantly different from each other by LSD test, respectively