Linked Life Data

20399097

Source:http://linkedlifedata.com/resource/pubmed/id/20399097

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
8
pubmed:dateCreated
2011-7-13
pubmed:abstractText
Xylem tracheary elements (TEs) form hollow, sap-conducting tubes kept open by thickened ribs of secondary cell wall that provide the major structural element in wood. These ribs are enriched with cellulose and lignin, molecules that utilize more atmospheric CO(2) than any other biopolymer on Earth. The thickenings form characteristic patterns (e.g., spiral and pitted) that depend upon the bundling of underlying microtubules [1, 2]. To identify microtubule-associated proteins (MAPs) involved in patterning microtubules, we optimized an in vitro system for triggering single Arabidopsis cells to differentiate synchronously into TEs. From more than 200 microtubule-implicated proteins, AtMAP70-5 was the only MAP upregulated upon, and specific to, TE differentiation. It lines the borders of each microtubule bundle and forms C-shaped "spacers" between adjacent bundles. Manipulating levels of AtMAP70-5 and its binding partner AtMAP70-1 by overexpression or RNA interference (RNAi) silencing shifted the balance between the characteristic patterns. RNAi silencing produced stunted plants with disorganized vascular bundles. In culture, RNAi knockdown caused ribs of secondary cell wall, surrounded by microtubules, to invaginate and fall into the cytoplasm. These results suggest that AtMAP70-5 and AtMAP70-1 are essential for defining where secondary cell wall polymers are applied at the cell cortex in wood-forming cells.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Apr
pubmed:issn
1879-0445
pubmed:author
pubmed:copyrightInfo
Copyright © 2010 Elsevier Ltd. All rights reserved.
pubmed:issnType
Electronic
pubmed:day
27
pubmed:volume
20
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
744-9
pubmed:meshHeading
pubmed:year
2010
pubmed:articleTitle
The microtubule-associated protein AtMAP70-5 regulates secondary wall patterning in Arabidopsis wood cells.
pubmed:affiliation
John Innes Centre, Norwich Research Park, NR4 7UH Norwich, UK. edouard.pesquet@plantphys.umu.se
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't