Transcription switches for protoxylem and metaxylem vessel formation

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<jats:p>Land plants evolved xylem vessels to conduct water and nutrients, and to support the plant. Microarray analysis with a newly established <jats:italic>Arabidopsis</jats:italic> 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. <jats:italic>VASCULAR-RELATED NAC-DOMAIN6</jats:italic> (<jats:italic>VND6</jats:italic>) and <jats:italic>VND7</jats:italic> can induce transdifferentiation of various cells into metaxylem- and protoxylem-like vessel elements, respectively, in <jats:italic>Arabidopsis</jats:italic> and poplar. A dominant repression of <jats:italic>VND6</jats:italic> and <jats:italic>VND7</jats:italic> 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.</jats:p>

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  • Genes & Development

    Genes & Development 19 (16), 1855-1860, 2005-08-15

    Cold Spring Harbor Laboratory

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