A glufosinate-ammonium dehydrogenase mutant and application in synthesis of l-glufosinate-ammonium thereof

A glufosinate-ammonium dehydrogenase mutant derived from Pseudomonas moorei, wherein the mutant is obtained by:

• mutating leucine at position 107 into arginine, mutating leucine at position 107 into arginine+phenylalanine at position 188 into proline, mutating leucine at position 107 into arginine+glycine at position 239 into lysine, mutating leucine at position 107 into arginine+phenylalanine at position 188 into proline+glycine at position 239 into tyrosine, mutating leucine at position 107 into arginine+phenylalanine at position 188 into proline+glycine at position 239 into cysteine, mutating leucine at position 107 into arginine+phenylalanine at position 188 into proline+glycine at position 239 into lysine, or mutating leucine at position 107 into arginine+phenylalanine at position 188 into proline+glycine at position 239 into lysine+phenylalanine at position 357 into glycine.