Plants having increased tolerance to herbicides

A method for producing a transgenic plant with increased herbicide tolerance or resistance as compared to a corresponding non-transformed wild type plant, comprising transforming a plant cell or a plant cell nucleus or a plant tissue with a nucleic acid molecule comprising a nucleic acid molecule selected from the group consisting of:

• (a) an isolated polynucleotide encoding a PPO polypeptide comprising the sequence of SEQ ID NO:
• 2 or 4, or a homolog thereof;
• (b) an isolated polynucleotide comprising the sequence of SEQ ID NO:
• 1 or 3, or a homolog thereof;
• (c) an isolated polynucleotide, which, as a result of the degeneracy of the genetic code, can be derived from a PPO polypeptide comprising the sequence of SEQ ID NO:
• 2 or 4, or a homolog thereof and confers an increased herbicide tolerance or resistance as compared to a corresponding, non-transformed, wild type plant cell, a wild type plant or a part thereof;
• (d) an isolated polynucleotide having 30% or more identity with the sequence of a polynucleotide comprising the sequence of SEQ ID NO:
• 1 or 3, or a homolog thereof and conferring an increased herbicide tolerance or resistance as compared to a corresponding, non-transformed, wild type plant cell, a wild type plant or a part thereof;
• (e) an isolated polynucleotide which hybridizes with an isolated polynucleotide of (a) to (c) under stringent hybridization conditions and confers an increased herbicide tolerance or resistance as compared to a corresponding, non-transformed, wild type plant cell, a wild type plant or a part thereof;
• and regenerating a transgenic plant from that transformed plant cell nucleus, plant cell or plant tissue with increased herbicide tolerance or resistance.