Construction of the Cabbage Plastid Transformation Vector and High-level Expression of gfp Gene in E.coli Cloning of potato polyphenol oxidase gene and constructing of antisense PPO expression vector Construction of plant expression vector harboring AtCKX1 Driven by drought inducible promoter of RD29B from Arabidopsis Bioinformatics analysis of CBF2 in three different chilling resistance grapes and construction of plant expression vector Construction of expression vector of PgMYB4 gene in Panax ginseng and analysis on drought resisting