Abstract: Using the sequence information of trichome regulating genes TRIPTYCHON（TRY），CAPRICE（CPC）and ENHANCER OF TRY AND CPC1（ETC1）in Arabidopsis to perform BLAST analysis against Cucumber Genome Database. We find that TRY，CPC and ETC1 all result in the same hit CsTRY in the cucumber genome. Overexpression of CsTRY in Arabidopsis greatly decrease the number of trichomes on the leaves，and significantly reduce the expression of trichome initiating gene GLABRA2（GL2），indicating that CsTRY may have the conserved function as Arabidopsis TRY，which inhibits trichome formation through reducing GL2 expression resulting from inhibition of the GL1-GL3/EGL3-TTG1 complex formation.

Key words: cucumber, trichome, CsTRY, transgene, expression analysis