Tissue specific promoters (SEQ. ID. No. 1-5) are disclosed, these being preferentially expressed in the xylem tissue of woody plants. These promoters are used e.g. to specifically regulate gene expression in xylem tissue and alter xylem properties in plants. Transgenic plants, exhibiting modified xylem properties can be produced using these promoters.

 
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> Transcription factor gene induced by water deficit conditions and abscisic acid from helianthus annuus, promoter and transgenic plants

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