May play a role in altering the properties of cell walls during germinative growth. Oligomer (believed to be a pentamer but probably hexamer). Soluble, microsomal and cell wall fractions. Roots and coleoptile. In roots, present in the mature region, but not in the tip. Not detected in leaves. Increased by salt stress in roots and decreased by salt stress in coleoptile. Glycosylated. Belongs to the germin family.