| Rhizobium nod factors reactivate the cell cycle during infection and nodule primordium formation, but the cycle is only completed in primordium formation. | |
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MedLine Citation:
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PMID: 7994175 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Rhizobia induce the formation of root nodules on the roots of leguminous plants. In temperate legumes, nodule organogenesis starts with the induction of cell divisions in regions of the root inner cortex opposite protoxylem poles, resulting in the formation of nodule primordia. It has been postulated that the susceptibility of these inner cortical cells to Rhizobium nodulation (Nod) factors is conferred by an arrest at a specific stage of the cell cycle. Concomitantly with the formation of nodule primordia, cytoplasmic rearrangement occurs in the outer cortex. Radially aligned cytoplasmic strands form bridges, and these have been called preinfection threads. It has been proposed that the cytoplasmic bridges are related to phragmosomes. By studying the in situ expression of the cell cycle genes cyc2, H4, and cdc2 in pea and alfalfa root cortical cells after inoculation with Rhizobium or purified Nod factors, we show that the susceptibility of inner cortical cells to Rhizobium is not conferred by an arrest at the G2 phase and that the majority of the dividing cells are arrested at the G0/G1 phase. Furthermore, the outer cortical cells forming a preinfection thread enter the cell cycle although they do not divide. |
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Authors:
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W C Yang; C de Blank; I Meskiene; H Hirt; J Bakker; A van Kammen; H Franssen; T Bisseling |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: The Plant cell Volume: 6 ISSN: 1040-4651 ISO Abbreviation: Plant Cell Publication Date: 1994 Oct |
Date Detail:
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Created Date: 1995-01-17 Completed Date: 1995-01-17 Revised Date: 2010-09-10 |
Medline Journal Info:
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Nlm Unique ID: 9208688 Medline TA: Plant Cell Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 1415-26 Citation Subset: IM |
Affiliation:
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Department of Molecular Biology, Wageningen Agricultural University, The Netherlands. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Amino Acid Sequence Bacterial Proteins / pharmacology* Base Sequence CDC2 Protein Kinase / biosynthesis, genetics Cell Cycle / drug effects* Cyclins / biosynthesis, genetics Fabaceae / cytology, drug effects*, microbiology Histones / biosynthesis, genetics Molecular Sequence Data Plant Roots / cytology, drug effects*, microbiology Plants, Medicinal* RNA, Messenger / analysis Rhizobium / chemistry* Symbiosis / physiology |
| Chemical | |
Reg. No./Substance:
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0/Bacterial Proteins; 0/Cyclins; 0/Histones; 0/RNA, Messenger; EC 2.7.11.22/CDC2 Protein Kinase |
| Comments/Corrections | |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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