The invention belongs to the field of variation or
genetic engineering, and discloses a T-to-G base editor for plants. The technical problem to be solved by the invention is how to realize T-to-G base editing in plants. The base editor for the
plant from T to G disclosed by the invention contains a Cas
protein and
uracil DNA glycosylase, wherein the
amino acid sequence of the
uracil DNA glycosylase is 20th to 244th sites of SEQ ID No.2. The invention also discloses a preparation method of the base editor for the
plant from T to G. Experiments prove that the base editor provided by the invention realizes targeted T-to-G editing with base editing efficiency as high as 78.05%, not only can solve the limitation that T direct editing cannot be realized in a rice
genome, but also can induce
exon jumping to obtain a required mature transcript. The base editor provided by the invention widens the targeting range of the base editor, and can also be applied to expression regulation of genes.