Endoplasmic Reticulum-Derived Compartments Function in Storage and as Mediators of Vacuolar Remodeling via a New Type of Organelle, Precursor Protease Vesicles

A schematic diagram of the ontogeny of ER-derived organelles is shown. ER-derived oil and protein bodies that either remain attached to the ER or accumulate as cytoplasmic population of organelles is shown above the diagrammed ER. These include both naturally occurring organelles as well as organelles induced by transgene expression. Other ER-derived organelles shown below the diagrammed ER merge with the vacuole by either autophagy (protein bodies and rubber particles) or by fusion (PAC vesicles and PPVs).