期刊
JOURNAL OF PHYCOLOGY
卷 46, 期 4, 页码 839-845出版社
WILEY
DOI: 10.1111/j.1529-8817.2010.00867.x
关键词
cellulose synthase; intracellular localization; Micrasterias denticulata; microparticle bombardment; overexpression; transient genetic transformation
资金
- Institute for the Promotion of Innovation through Science and Technology in Flanders
- Japan Society for the Promotion of Science, Japan [20570044, 20247032]
- Institute for Fermentation, Osaka, Japan [2009-2011]
- New Technology Development Foundation
- Grants-in-Aid for Scientific Research [20247032, 20570044, 22405014] Funding Source: KAKEN
The desmid Micrasterias denticulata Breb. is useful for the study of streptophyte cell wall biology and morphology. However, no tools to analyze cell biological processes in vivo in this species are available. In the present study, transient gene expression under the control of the chl a/b-binding protein gene of the Closterium peracerosum-strigosum-littorale complex (CpCAB1) promotor was achieved for M. denticulata and illustrated by the intracellular localization of an endogenous cellulose synthase (MdCesA1). A transformation efficiency of 1/5,000 cells was achieved following microparticle bombardment. The free green fluorescent protein (GFP) signal was detected both in the nucleus and in the cytoplasm. The MdCesA1-GFP fusion protein, on the other hand, occurred at the plasma membrane in particles concentrated at the lobe indentations, the lobe tips, and, to a lesser extent, along the lobe sides. Hence, the multipolar growth mechanism of the cell is reflected. In addition, the margins of cytoplasmic compartments, most likely dictyosomes, were labeled, in accordance with the known secretory pathway of cellulose synthase complexes. Besides intracellular localization studies, the utility of the system for overexpression phenotyping is discussed.
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