NDLI: Functional conservation of a root hair cell-specific cis-element in angiosperms with different root hair distribution patterns.

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Functional conservation of a root hair cell-specific cis-element in angiosperms with different root hair distribution patterns.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Kim, Dong Wook Lee, Sang Ho Choi, Sang-Bong Won, Su-Kyung Heo, Yoon-Kyung Cho, Misuk Park, Youn-Il Cho, Hyung-Taeg
Description	Author Affiliation: Kim DW ( Department of Biology, Chungnam National University, Daejeon 305-764, Korea.)
Abstract	Vascular plants develop distinctive root hair distribution patterns in the root epidermis, depending on the taxon. The three patterns, random (Type 1), asymmetrical cell division (Type 2), and positionally cued (Type 3), are controlled by different upstream fate-determining factors that mediate expression of root hair cell-specific genes for hair morphogenesis. Here, we address whether these root hair genes possess a common transcriptional regulatory module (cis-element) determining cell-type specificity despite differences in the final root hair pattern. We identified Arabidopsis thaliana expansinA7 (At EXPA7) orthologous (and paralogous) genes from diverse angiosperm species with different hair distribution patterns. The promoters of these genes contain conserved root hair-specific cis-elements (RHEs) that were functionally verified in the Type-3 Arabidopsis root. The promoter of At EXPA7 (Type-3 pattern) also showed hair cell-specific expression in the Type 2 rice (Oryza sativa) root. Root hair-specific genes other than EXPAs also carry functionally homologous RHEs in their promoters. The RHE core consensus was established by a multiple alignment of functionally characterized RHEs from different species and by high-resolution analysis of At EXPA7 RHE1. Our results suggest that this regulatory module of root hair-specific genes has been conserved across angiosperms despite the divergence of upstream fate-determining machinery.
File Format	HTM / HTML
ISSN	10404651
e-ISSN	1531298X
Journal	THE PLANT CELL ONLINE
Issue Number	11
Volume Number	18
Language	English
Publisher	American Society of Plant Biologists
Publisher Date	2006-11-01
Publisher Place	United States
Access Restriction	Open
Subject Keyword	Discipline Botany Angiosperms Genetics Plant Roots Cytology Promoter Regions, Genetic Arabidopsis Proteins Consensus Sequence Conserved Sequence Gene Expression Regulation, Plant Glucosyltransferases Models, Genetic Molecular Sequence Data Oryza Sativa Phylogeny Plant Proteins Metabolism Point Mutation Sequence Homology Research Support, Non-u.s. Gov't
Content Type	Text
Resource Type	Article
Subject	Cell Biology Plant Science

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