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Updated: Apr 1, 2026
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Annotation of Plant Gene Function via Combined Genomics, Metabolomics and Informatics
Published on: June 17, 2012
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Physiological Functions of the COPI Complex in Higher Plants
Hee-Kyung Ahn1, Yong Won Kang1,2, Hye Min Lim1,3
1Department of Systems Biology, Yonsei University, Seoul 120-749, Korea.
Molecules and Cells
|October 6, 2015
Summary
COPI vesicles are crucial for plant survival, maintaining Golgi structure and cell plate formation. Their disruption leads to programmed cell death, highlighting their essential role in plant growth.
Area of Science:
- Plant Cell Biology
- Molecular Plant Science
- Secretory Pathway Dynamics
Background:
- COPI vesicles mediate retrograde transport in the early secretory pathway.
- The COPI coatomer complex has seven subunits (α-, β-, β'-, γ-, δ-, ε-, ζ-COP).
- Essential functions of COPI subunits in plants have been difficult to study due to their critical roles.
Purpose of the Study:
- To investigate the in vivo functions of COPI coatomer complex subunits in plants.
- To characterize the roles of specific COPI subunits in plant growth, survival, and cellular processes.
Main Methods:
- Virus-induced gene silencing (VIGS) was used to deplete COPI subunit genes in Nicotiana benthamiana.
- Dexamethasone (DEX)-inducible RNA interference (RNAi) was employed in tobacco BY-2 cells.
- Localization and interaction studies using GFP-fusion proteins were performed for β'-, γ-, and δ-COP subunits.
Main Results:
- β'-, γ-, and δ-COP subunits localized to and interacted within the Golgi apparatus.
- Silencing of β'-, γ-, and δ-COP led to growth arrest and programmed cell death in N. benthamiana.
- Depletion of COPI subunits disrupted Golgi structure and caused autolysosome accumulation.
- RNAi of β'-COP in BY-2 cells resulted in aberrant cell plate formation during cytokinesis.
Conclusions:
- COPI vesicles are essential for plant growth and survival.
- The COPI complex plays a vital role in maintaining Golgi apparatus integrity.
- COPI function is critical for proper cell plate formation during plant cell division.
Keywords:
COPI vesicleGolgi localizationautophagycell deathcell plate formationvirus-induced gene silencingMore Related Videos
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