Cellulose microfibrils are laid down in the inner surface of the primary cell wall. As the cell absorbs water, its volume increases and the existing microfibrils separate and new ones are formed to help increase cell strength.

Where are cellulose microfibrils formed in the plasma membrane?

Cellulose microfibrils are synthesized at the cell surface by rosette structures known as the CSC. Each CSC is composed of six rosette subunits, and each subunit contains several catalytically active cellulose synthase proteins (CESAs) that synthesize cellulose chains (Figure 3(a)).

What are microfibrils in stomata?

The anisotropic nature of stomatal cell walls plays a major role in the stomatal bio-mechanical functionality. The stomatal cellulose microfibrils orientation along the circumference of the guard cell (Ziegenspeck, 1938) forces the elongation of the guard cells that drives pore opening.