verb (used without object) 1. to differ in sentiment or opinion, especially from the majority; withhold assent; disagree (often followed by from): Two of the justices dissented from the majority decision. 2. to disagree with the methods, goals, etc., of a political party or government; take an opposing view.
This contrasts with the cell walls of fungi (which are made of chitin), and of bacteria, which are made of peptidoglycan. Cell walls perform many essential functions: they provide shape to form the tissue and organs of the plant, and play an important role in intercellular communication and plant-microbe interactions.
Both the cell membrane and the cell wall serve this function. All cells have a cell membrane, and certain cells (plant and bacterial) also have a cell wall. The cell membrane's main function is to regulate the movement of materials into and out of the cell. During plasmolysis, the cell membrane pulls away from the cell wall. 2  This does not happen in low salt concentration because of the rigid cell wall. 3  Plant cells maintain their normal size and shape in a low salt concentration solution.