Plays a role in the regulation of cell expansion, root meristem patterning and auxin transport. Specifically expressed in the quiescent center and cortex or endodermis initials of root stem niches. Expressed in vascular tissues from hypocotyls, petioles and cotyledons. During lateral root development, expressed in the prospective quiescent center of lateral root primordia. In newly formed lateral roots, strongly expressed in the quiescent center and initial cells and weakly expressed in the endodermis. By auxin. Plants over-expressing SAUR41 display pleiotropic auxin-related phenotypes. These phenotypes include elongated hypocotyls, increased length of primary roots, increased numbers of lateral roots, increased vegetative biomass, twisted inflorescence stems, overexpanded petals, reduced seed setting and increased basipetal auxin transport in hypocotyls. Belongs to the ARG7 family.