A brief note on the study of yieldin, a wall-bound protein that regulates the yield threshold of the cell wall

Abstract.

Yielding of plant-cell walls is defined by the mechanical properties of walls such as their extensibility (Φ for in vivo, φ for in vitro cell wall) and yield threshold (Y for in vivo, y for in vitro cell wall). A protein named yieldin, isolated from the cell wall of growing hypocotyls of Vigna unguiculata L. (cowpea), has been demonstrated to regulate the pH dependency of y in the cell wall of the glycerinated hollow cylinder of the cowpea hypocotyl. This mini-review outlines the process of the discovery of yieldin, and also refers to the progress of studies on yieldin: the molecular cloning of yieldin and its immunolocalization in the etiolated cowpea hypocotyl.