Endo-1,4-beta-xylanase involved in the hydrolysis of xylan, a major structural heterogeneous polysaccharide found in plant biomass representing the second most abundant polysaccharide in the biosphere, after cellulose. Plays an important role in causing fusarium head blight (FHB) on cereal crops. Induces cell death and hydrogen peroxide accumulation in infected wheat leaves. Endohydrolysis of (1->4)-beta-D-xylosidic linkages in xylans. Inhibited by the proteinaceous endoxylanase inhibitor I from T.aestivum (TAXI-I). Optimum pH is 7.0. Optimum temperature is 40 degrees Celsius. Glycan degradation; xylan degradation. Expression is under the control of transcription factor XYR1 and highly induced during wheat infection and by xylan. Leads to about 40 percent reduction of xylanase activity when grown in culture with xylan as carbon source. Belongs to the glycosyl hydrolase 11 (cellulase G) family.