Tea tree CsVAAT3 gene and application thereof

The invention discloses a tea tree CsVAAT3 gene and application thereof. The nucleotide sequence of the tea tree CsVAAT3 gene is shown as SEQ ID NO.1 in a sequence table. The amino acid sequence of the protein coded by the tea tree CsVAAT3 gene is as shown in SEQ ID NO.2 in the sequence table. The expression mode of the tea tree CsVAAT3 is in significant positive correlation with the nitrogen level of the root system of the tea tree, the CsVAAT3 is highly expressed in the root of the tea tree, and the growth ability of a yeast mutant on a high-concentration theanine culture medium can be recovered by transforming a pDR196-CsVAAT3 plasmid constructed by the gene to a vacuolar amino acid absorption deficient yeast strain ypq2. Cloning of the gene is beneficial to analysis of a molecular mechanism of theanine storage of a tea tree root system, and an important target gene resource and a theoretical basis are provided for cultivation of a new tea tree variety with high theanine content. 本发明公开了茶树CsVAAT3基因及其应用，茶树Cs