Correlation between xylose and glucose yields of untreated and hydrothermally (HT)-treated Robigus leaves and stems. (A) 24-h hydrolysis. (B) 72-h hydrolysis. Enzymatic hydrolysis conditions: 5% dry matter (DM), 5 filter paper units (FPU) g−1 DM, 800 rpm. Sugar yield was calculated as the ratio of released sugar to theoretical sugar (g/g).