Binds to and hydrolyzes insoluble and soluble xylan substrates (By similarity). Exhibits xylanase activity (PubMed:12154138). Endohydrolysis of (1->4)-beta-D-xylosidic linkages in xylans. Glycan degradation; xylan degradation. Predominantly expressed in vascular bundles, but not in vessel cells. Mostly expressed in stems, at lower levels in roots, and weakly in inflorescences and seedlings. In seedlings, present in the root, hypocotyl and cotyledon veins. In roots, excluded from the root tip, otherwise observed in the endodermis, pericycles and vascular bundles, except vessels. Expressed in the root differentiation zone, especially during root hair formation. In mature plants, mostly detected in vascular bundles, but not in vessel cells. The GH10 domain binds to xylan. Belongs to the glycosyl hydrolase 10 (cellulase F) family. Truncated N-terminus.