Abstract: The present invention relates to a genetic construct comprising a nucleic acid sequence encoding cytokinin biosynthetic isopentenyl-transferase enzyme (IPT) operable linked to a promoter allowing expression of said nucleic acid sequence in cambial cells. The invention relates also a method for producing a transgenic plant capable of increased biomass production and/or increased stem volume growth compared to wild type plant and a method for improving the production of biomass and/or increased stem volume growth in trees, as well as to a tree that over expresses an endogenous or exogenous nucleic acid sequence encoding IPT in cambial cells and a wood product obtainable from the transgenic tree.

Abstract: The present invention relates to a genetic construct comprising a nucleic acid sequence encoding cytokinin biosynthetic isopentenyl-transferase enzyme (IPT) operable linked to a promoter allowing expression of said nucleic acid sequence in cambial cells. The invention relates also a method for producing a transgenic plant capable of increased biomass production and/or increased stem volume growth compared to wild type plant and a method for improving the production of biomass and/or increased stem volume growth in trees, as well as to a tree that over expresses an endogenous or exogenous nucleic acid sequence encoding IPT in cambial cells and a wood product obtainable from the transgenic tree.

Abstract: The present invention relates to a polypeptide, or a fragment thereof, capable of enhancing callose biosynthesis and/or accumulation, wherein at least one of the conserved amino acid residues selected from the group consisting of residue corresponding to R84 of SEQ ID NO: 1, residue corresponding to R1926 or SEQ ID NO: 1 and residue corresponding to P189 of SEQ ID NO: 1, of the polypeptide or a fragment thereof, is modified by a mutation selected from the group consisting of substitution and deletion.

Abstract: The present invention relates to a genetic construct comprising a nucleic acid sequence encoding cytokinin biosynthetic isopentenyl-transferase enzyme (IPT) operable linked to a promoter allowing expression of said nucleic acid sequence in cambial cells. The invention relates also a method for producing a transgenic plant capable of increased biomass production and/or increased stem volume growth compared to wild type plant and a method for improving the production of biomass and/or increased stem volume growth in trees, as well as to a tree that over expresses an endogenous or exogenous nucleic acid sequence encoding IPT in cambial cells and a wood product obtainable from the transgenic tree.

Abstract: The present invention relates to a polypeptide, or a fragment thereof, capable of enhancing callose biosynthesis and/or accumulation, wherein at least one of the conserved amino acid residues selected from the group consisting of residue corresponding to R84 of SEQ ID NO: 1, residue corresponding to R1926 or SEQ ID NO: 1 and residue corresponding to P189 of SEQ ID NO: 1, of the polypeptide or a fragment thereof, is modified by a mutation selected from the group consisting of substitution and deletion.