| Sites and regulation of polyamine catabolism in the tobacco plant. Correlations with cell division/expansion, cell cycle progression, and vascular development. | |
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MedLine Citation:
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PMID: 16040649 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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We previously gave a picture of the homeostatic characteristics of polyamine (PA) biosynthesis and conjugation in tobacco (Nicotiana tabacum) plant organs during development. In this work, we present the sites and regulation of PA catabolism related to cell division/expansion, cell cycle progression, and vascular development in the tobacco plant. Diamine oxidase (DAO), PA oxidase (PAO), peroxidases (POXs), and putrescine N-methyltransferase expressions follow temporally and spatially discrete patterns in shoot apical cells, leaves (apical, peripheral, and central regions), acropetal and basipetal petiole regions, internodes, and young and old roots in developing plants. DAO and PAO produce hydrogen peroxide, a plant signal molecule and substrate for POXs. Gene expression and immunohistochemistry analyses reveal that amine oxidases in developing tobacco tissues precede and overlap with nascent nuclear DNA and also with POXs and lignification. In mature and old tissues, flow cytometry indicates that amine oxidase and POX activities, as well as pao gene and PAO protein levels, coincide with G2 nuclear phase and endoreduplication. In young versus the older roots, amine oxidases and POX expression decrease with parallel inhibition of G2 advance and endoreduplication, whereas putrescine N-methyltransferase dramatically increases. In both hypergeous and hypogeous tissues, DAO and PAO expression occurs in cells destined to undergo lignification, suggesting a different in situ localization. DNA synthesis early in development and the advance in cell cycle/endocycle are temporally and spatially related to PA catabolism and vascular development. |
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Authors:
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Konstantinos A Paschalidis; Kalliopi A Roubelakis-Angelakis |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2005-07-22 |
Journal Detail:
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Title: Plant physiology Volume: 138 ISSN: 0032-0889 ISO Abbreviation: Plant Physiol. Publication Date: 2005 Aug |
Date Detail:
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Created Date: 2005-09-20 Completed Date: 2005-12-23 Revised Date: 2010-09-21 |
Medline Journal Info:
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Nlm Unique ID: 0401224 Medline TA: Plant Physiol Country: United States |
Other Details:
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Languages: eng Pagination: 2174-84 Citation Subset: IM |
Affiliation:
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Department of Biology, University of Crete, 71409 Heraklion Crete, Greece. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Cell Cycle
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physiology* DNA, Plant / biosynthesis Gene Expression Regulation, Developmental / physiology Gene Expression Regulation, Plant / physiology* Oxidoreductases Acting on CH-NH Group Donors / biosynthesis* Plant Leaves / metabolism Plant Proteins / metabolism Polyamines / metabolism* Tobacco / metabolism* Up-Regulation |
| Chemical | |
Reg. No./Substance:
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0/DNA, Plant; 0/Plant Proteins; 0/Polyamines; EC 1.5.-/Oxidoreductases Acting on CH-NH Group Donors |
| Comments/Corrections | |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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