Regulation of the Arabidopsis root vascular initial population by LONESOME HIGHWAY.

Regulation of the Arabidopsis root vascular initial population by LONESOME HIGHWAY. Research Abstract Details 

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Regulation of the Arabidopsis root vascular initial population by LONESOME HIGHWAY. Abstract Text:

Kyoko Ohashi-Ito,Dominique C Bergmann,

Complex organisms consist of a multitude of cell types arranged in a precise spatial relation to each other. Arabidopsis roots generally exhibit radial tissue organization; however, within a tissue layer, cells are not identical. Specific vascular cell types are arranged in diametrically opposed longitudinal files that maximize the distance between them and create a bilaterally symmetric (diarch) root. Mutations in the LONESOME HIGHWAY (LHW) gene eliminate bilateral symmetry and reduce the number of cells in the center of the root, resulting in roots with only single xylem and phloem poles. LHW does not appear to be required for the creation of any specific cell type, but coordinately controls the number of all vascular cell types by regulating the size of the pool of cells from which they arise. We cloned LHW and found that it encodes a protein with weak sequence similarity to basic helix-loop-helix (bHLH)-domain proteins. LHW is a transcriptional activator in vitro. In plants, LHW is nuclear-localized and is expressed in the root meristems, where we hypothesize it acts independently of other known root-patterning genes to promote the production of stele cells, but might also indirectly feed into established regulatory networks for the maintenance of the root meristem.

Regulation of the Arabidopsis root vascular initial population by LONESOME HIGHWAY. Publishing Authors By Initials

K Ohashi-Ito,DC Bergmann,

For similar plants: plant components: xylem research abstracts see: plants: plant components: xylem research

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Regulation of the Arabidopsis root vascular initial population by LONESOME HIGHWAY. Journal Published:

PUBLICATION TYPE: Research Support, U.S. Gov't,

Journal: Development (Cambridge, England)

VOLUME: 134

Page Numbers: 2959-68

Journal Abbreviation: Development

ISSN: 0950-1991

DAY: 11

MONTH: 07

YEAR: 2007

Regulation of the Arabidopsis root vascular initial population by LONESOME HIGHWAY. Information

Number of References:

LANGUAGE: eng

NlmUniqueID: 8701744

Regulation of the Arabidopsis root vascular initial population by LONESOME HIGHWAY. Keywords Mesh Terms:

KEYWORDS: Xylem

MESH TERMS: genetics

Chemical & Substance for Abstract: Regulation of the Arabidopsis root vascular initial population by LONESOME HIGHWAY. Information

Substance Name: WOL protein, Arabidopsis

Registry Number: EC 2.7.3.-

Grant and Affiliation Information for Regulation of the Arabidopsis root vascular initial population by LONESOME HIGHWAY.

AFFILIATION: Stanford University, Department of Biological Sciences, Stanford, CA 94305, USA.

Country: England

AGENCY: United States NIGMS

GRANT: 5F32GM064273-03

ACRONYM: GM

MEDLINETA: Development

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