Protein transport within the plant cell endomembrane system: an update.

The secretory pathway plays a central role in plant development and morphogenesis. Storage protein deposition, plant cell division and the expansion of the plasma membrane and extracellular matrix all require the synthesis and trafficking of membranes, proteins and polysaccharides through this network of organelles. Increasing evidence demonstrates that the plant secretory pathway is more complex than previously appreciated and that its formation and maintenance are guided/regulated by many different mechanisms.