A transgenic plant of Hevea brasiliensis with reduced lignin content characterized in that expression of at least one nucleic acid template containing sequence selected from SEQ ID NOs. 1-13 in at least one cell is down-regulated. These sequences encode coniferyl alcohol glucosyltransferases and coniferin-hydrolyzing β- glucosidases identified in H. brasiliensis.Plante transgénique de Hevea brasiliensis ayant une teneur de lignine réduite caractérisée en ce que lexpression dau moins un acide nucléique matrice contenant la séquence SEQ ID No. 1, SEQ ID No.2, SEQ ID No.3, SEQ ID No.4, SEQ ID No.5, SEQ ID No.6, SEQ ID No.7, SEQ ID No.8, SEQ ID No.9, SEQ ID No.10, SEQ ID No. 11, SEQ ID No.12, ou SEQ ID No.13 dans au moins une cellule est sous-régulée.
