The present invention relates to the technical field of biology, and provides a PPO2 polypeptide having tolerance to a PPO inhibitor herbicide and an application. When applied to a plant, the PPO2 polypeptide can greatly improve the resistance of the plant to a PPO inhibitor herbicide. The PPO2 polypeptide can be used for plants including cash crops, and can be selected to be used according to herbicide resistance characteristics and herbicides, thereby achieving the purpose of economically controlling weed growth.

The present invention refers to a method for controlling undesired vegetation at a plant cultivation site, the method comprising the steps of providing, at said site, a plant that comprises at least one nucleic acid comprising a nucleotide sequence encoding a wild-type or a mutated protoporphyrinogen oxidase (PPO) which is resistant or tolerant to a PPO-inhibiting herbicide by applying to said site an effective amount of said herbicide. The invention further refers to plants comprising wild-type or mutated PPO enzymes, and methods of obtaining such plants.

The invention provides recombinant DNA molecules useful for providing efficient expression of proteins in transgenic plants, as well as compositions and methods for using the recombinant DNA molecules. In particular embodiments, the invention provides recombinant DNA molecules and constructs comprising sequences encoding transit peptides and operably linked sequences conferring herbicide tolerance.

The invention refers to plants comprising wild-type or mutated Alopecurus PPO enzymes, and methods of obtaining such plants. The present invention further refers to a method for controlling weeds at a plant cultivation site, the method comprising the steps of providing, at said site, a plant that comprises at least one nucleic acid comprising a nucleotide sequence encoding a wild-type or a mutated Alopecurus PPO enzyme which is resistant or tolerant to a PPO-inhibiting herbicide by applying to said site an effective amount of said herbicide.

The present invention refers to a method for controlling undesired vegetation at a plant cultivation site, the method comprising the steps of providing, at said site, a plant that comprises at least one nucleic acid comprising a nucleotide sequence encoding a wild-type or a mutated protoporphyrinogen oxidase (PPO) which is resistant or tolerant to a PPO-inhibiting herbicide by applying to said site an effective amount of said herbicide. The invention further refers to plants comprising wild-type or mutated PPO enzymes, and methods of obtaining such plants.

The present invention refers to a method for controlling undesired vegetation at a plant cultivation site, the method comprising the steps of providing, at said site, a plant that comprises at least one nucleic acid comprising a nucleotide sequence encoding a wild-type or a mutated protoporphyrinogen oxidase (PPO) which is resistant or tolerant to a PPO-inhibiting herbicide by applying to said site an effective amount of said herbicide. The invention further refers to plants comprising wild-type or mutated PPO enzymes, and methods of obtaining such plants.

The present disclosure relates to protoporphyrinogen IX oxidase (PPO) polypeptides, and nucleic acids encoding such polypeptides. The present disclosure describes a mutation in a PPO sequence that imparts herbicide-resistance, particularly oxadiazole-resistance, to plants.

Provided are methods for conferring and/or enhancing herbicide resistance on plants or algae including agricultural crops by introducing prokaryote-derived protoporphyrinogen oxidase variants.

Provided is a technology for conferring enhanced tolerance and/or enhancing tolerance to a herbicide of a plant and/or algae by using amino acid variants of protoporphyrinogen IX oxidase derived from prokaryotes.

The invention relates to biotechnology and provides novel recombinant DNA molecules and engineered proteins for conferring tolerance to protoporphyrinogen oxidase-inhibitor herbicides. The invention also provides herbicide tolerant transgenic plants, seeds, cells, and plant parts containing the recombinant DNA molecules, as well as methods of using the same.