Plant and Cell Physiology Advance Access published online on January 19, 2005
Plant and Cell Physiology, doi:10.1093/pcp/pci019
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1 Laboratory of Genetic Engineering, Graduate School of Agriculture, Kyoto Prefectural University, Shimogamo, Kyoto 606-8522, Japan
* To whom correspondence should be addressed. We found novel vesicles derived from rough endoplasmic reticulum (ER) in rice endosperm. The novel vesicles had characteristic structures different from that of the ER-derived protein body type I and the Golgi-derived dense vesicles. Immunocytochemical analysis revealed that the novel vesicles are derived directly from the aggregates of vacuolar storage proteins in the rough ER. In addition, BiP, an ER-resident molecular chaperone, was localized in the novel vesicles, but also in protein storage vacuoles (PSVs). These results suggest that the novel vesicles mediate transport of vacuolar storage proteins directly from the ER to PSVs in rice endosperm.
Received June 26, 2004
Accepted November 9, 2004
Short Communication
A Novel Vesicle Derived Directly from Endoplasmic Reticulum Is Involved in the Transport of Vacuolar Storage Proteins in Rice Endosperm
2 Laboratory of Genetic Engineering, Graduate School of Agriculture, Kyoto Prefectural University, Shimogamo, Kyoto 606-8522, Japan; Kyoto Prefectural Institute of Agricultural Biotechnology, Seika, Kyoto 619-0244, Japan
Takehiro Masumura, E-mail: masumura{at}kpu.ac.jp
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