Glycine-rich proteins as structural components of plant cell walls.

摘要: Glycine-rich proteins (GRPs) have been found in the cell walls of many higher plants and form a third group structural protein components wall addition to extensins proline-rich proteins. The primary sequences GRPs contain more than 60% glycine. are localized mainly vascular tissue plant, their coding genes provide an excellent system analyze molecular basis vascular-specific gene expression. In French bean, major GRP has at ultrastructural level modified protoxylem. Immunological studies showed that it forms part these highly extensible specialized walls. Specific digestion GRP1.8 from bean by collagenase suggests shares similarities with collagen. is synthesized living protoxylem cells as well xylem parenchyma cells. After death, exported neighboring wall, rare example transport between plants. We propose repair plant during stretching phase