| 摘要 |
The invention provides isolated and at least partially-purified dicamba- degrading enzymes, isolated DNA molecules coding for dicamba-degrading enzymes, DNA constructs coding for dicamba-degrading enzymes, transgenic hos t cells comprising DNA coding for dicamba-degrading enzymes, and transgenic plants and plant parts comprising one or more cells comprising DNA coding fo r dicamba-degrading enzymes. The invention further provides a transit peptide for use in a DNA construct comprising such dicamba-degrading enzymes that targets said dicamba-degrading oxygenase to organelles of a plant cell. Expression of the dicamba-degrading enzymes results in the production of dicamba-degrading organisms, including dicamba-tolerant plants. The inventio n further provides a method of controlling weeds in a field containing the transgenic dicamba-tolerant plants of the invention and a method of decontaminating a material containing dicamba comprising applying an effecti ve amount of a transgenic microorganism or dicamba-degrading enzyme(s) of the invention to the material. Finally, the invention provides a method of selecting transformed plants and plant cells based on dicamba tolerance and a method of selecting or screening transformed host cells, intact organisms an d parts of organisms based on the fluorescence of 3,6-dichlorosalicylic acid produced as a result of dicamba degradation. |
