Hyaluronic acid producing plant

[PROBLEMS] To improve a known method for producing hyaluronic acid in a plant, to produce hyaluronic acid at a lower cost and in a higher yield than conventional methods, or a plant culture cell and a method for producing the same, and a method for transformation An expression vector, a method for producing hyaluronic acid using the plant or the plant cultured cell, and the like are provided. The production of hyaluronic acid is characterized in that hyaluronic acid is obtained by simultaneously expressing a protein having hyaluronic acid synthase activity and a protein having exogenous sugar nucleotide synthase activity in plant cells or plants. Provide a method. [Selection] Figure 6