Abstract:
:Endoplasmic reticulum (ER) is a major site for secretory protein folding and lipid synthesis. Since ER cannot be synthesized de novo, it must be inherited during the cell cycle. Studying ER inheritance can however be difficult because the ER of typical plant and animal cells is morphologically complex. Therefore, our study used Cyanidioschyzon merolae, a species that has a simple ER structure, to investigate the inheritance of this organelle. Using immunofluorescence microscopy, we demonstrated that C. merolae contains a nuclear ER (nuclear envelope) and a small amount of peripheral ER extending from the nuclear ER. During mitosis, the nuclear ER became dumbbell-shaped and underwent division. Peripheral ER formed ring-like structures during the G1 and S phases, and extended toward the mitochondria and cell division planes during the M phase. These observations indicated that C. merolae undergoes closed mitosis, whereby the nuclear ER does not diffuse, and the peripheral ER contains cell cycle-specific structures.
journal_name
Protoplasmajournal_title
Protoplasmaauthors
Yagisawa F,Fujiwara T,Kuroiwa H,Nishida K,Imoto Y,Kuroiwa Tdoi
10.1007/s00709-011-0359-1subject
Has Abstractpub_date
2012-10-01 00:00:00pages
1129-35issue
4eissn
0033-183Xissn
1615-6102journal_volume
249pub_type
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