Tea tree MYB transcription factor gene CsMYB4 and application thereof

The invention discloses a tea tree MYB transcription factor gene CsMYB4 and application thereof, and belongs to the technical field of biology. The CDS sequence of the gene is shown in SEQ ID NO: 1, and the gene encodes an MYB transcription factor. The CsMYB4 gene has the function of improving the antifungal activity of plants, the antifungal gene CsMYB4 is constructed to a plant expression vector and is transferred into Nicotiana benthamiana for transient overexpression, or the antifungal gene CsMYB4 is transformed into tobacco plants through stable heredity, and both the antifungal gene CsMYB4 and the plant expression vector have strong in-vitro antifungal activity. According to the present invention, the CsMYB4 overexpressed transgenic tobacco has strong antibacterial activity on Botrytis cinerea and Epicoccum sorgo, and after the CsMYB4 gene is silenced by using the virus induced gene silencing (VIGS) technology, the growth of the plant is blocked, and the disease resistance is substantially weakened; 本发明