The Arabidopsis Athb-10 (GLABRA2) is an HD-Zip protein required for regulation of root hair development (Articolo in rivista)

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  • The Arabidopsis Athb-10 (GLABRA2) is an HD-Zip protein required for regulation of root hair development (Articolo in rivista) (literal)
Anno
  • 1996-01-01T00:00:00+01:00 (literal)
Alternative label
  • M. Di Cristina (2); G Sessa (1); L Dolan (3); P Linstead (3); S Baima (2); I Ruberti I (1); G Morelli (2) (1996)
    The Arabidopsis Athb-10 (GLABRA2) is an HD-Zip protein required for regulation of root hair development
    in Plant journal (Online); WILEY-BLACKWELL, 111 RIVER ST, HOBOKEN 07030-5774, NJ (Stati Uniti d'America)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • M. Di Cristina (2); G Sessa (1); L Dolan (3); P Linstead (3); S Baima (2); I Ruberti I (1); G Morelli (2) (literal)
Pagina inizio
  • 393 (literal)
Pagina fine
  • 402 (literal)
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  • 10 (literal)
Rivista
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  • 3 (literal)
Note
  • ISI Web of Science (WOS) (literal)
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  • (1) Istituto di Biologia e Patologia Molecolari (2) Istituto di Ricerca per la Nutrizione e gli Alimenti (3) John Innes Center Plant Science Research (literal)
Titolo
  • The Arabidopsis Athb-10 (GLABRA2) is an HD-Zip protein required for regulation of root hair development (literal)
Abstract
  • Homeodomain-leucine zipper (HD-Zip) proteins are putative transcription factors identified only in plants. Related Arabidopsis homeobox genes, isolated by virtue of sequence conservation within the helix-3 region of the homeodomain, fall into four families based on sequence similarity. This paper reports the characterization of Athb-10, a 747 amino acid protein belonging to the fourth HD-ZIP family. The studies indicate that, although less conserved, the leucine zipper of Athb-10 can functionally replace that of Athb-2 in an in vitro DNA-binding assay. Gene mapping experiments and sequence comparison analysis revealed that Athb-10 corresponds to GLABRA2, a homeodomain protein involved in trichome development. The mRMA expression analysis revealed that Athb-10/GLABRA2 is expressed not only in trichome-bearing organs, but also in the root. The analysis of wild-type and mutant plants showed that the Athb-10/GLABRA2 gene expression in the aerial part of the plant and in the root is affected by mutations at the TTG locus. Morphological analysis of the gl2-1 mutant revealed that the gene is necessary not only for local outgrowth of the trichome, but also for the regulation of root hair development in a subset of epidermal cells. Interestingly, the development of root hair cells in a position normally occupied by non-hair cells is dependent upon the ethylene regime in which the gl2-1 plants are grown. Sequence analysis of the gl2-1 allele revealed that the mutant gene encodes a truncated protein that might still retain a partial activity responsible for the formation of aborted trichomes and for the ethylene-dependent regulation of root hair formation. (literal)
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