title: Transcription switches for protoxylem and metaxylem vessel formation.
abstract: Land plants evolved xylem vessels to conduct water and nutrients, and to support the plant. Microarray analysis with a newly established Arabidopsis in vitro xylem vessel element formation system and promoter analysis revealed the possible involvement of some plant-specific NAC-domain transcription factors in xylem formation. VASCULAR-RELATED NAC-DOMAIN6 (VND6) and VND7 can induce transdifferentiation of various cells into metaxylem- and protoxylem-like vessel elements, respectively, in Arabidopsis and poplar. A dominant repression of VND6 and VND7 specifically inhibits metaxylem and protoxylem vessel formation in roots, respectively. These findings suggest that these genes are transcription switches for plant metaxylem and protoxylem vessel formation.
authors.affiliation: RIKEN Plant Science Center, Yokohama, Kanagawa, Japan.
authors.forename: Minoru
authors.initials: M
authors.lastname: Kubo
authors.forename: Makiko
authors.initials: M
authors.lastname: Udagawa
authors.forename: Nobuyuki
authors.initials: N
authors.lastname: Nishikubo
authors.forename: Gorou
authors.initials: G
authors.lastname: Horiguchi
authors.forename: Masatoshi
authors.initials: M
authors.lastname: Yamaguchi
authors.forename: Jun
authors.initials: J
authors.lastname: Ito
authors.forename: Tetsuro
authors.initials: T
authors.lastname: Mimura
authors.forename: Hiroo
authors.initials: H
authors.lastname: Fukuda
authors.forename: Taku
authors.initials: T
authors.lastname: Demura
mesh_terms: D029681:Arabidopsis Proteins / Q000235:genetics / Q000502:physiology*; D002454:Cell Differentiation / Q000235:genetics / Q000502:physiology*; D020869:Gene Expression Profiling; D018506:Gene Expression Regulation, Plant / Q000502:physiology; D018519:Meristem / Q000235:genetics / Q000502:physiology*; D020411:Oligonucleotide Array Sequence Analysis; D010641:Phenotype; D017434:Protein Structure, Tertiary / Q000235:genetics; D014157:Transcription Factors / Q000235:genetics / Q000502:physiology*; D014158:Transcription, Genetic / Q000502:physiology
chemical_list: D029681:Arabidopsis Proteins; D014157:Transcription Factors