Abstract: Eighteen ARF family members were identified from Cucumber Genome Datebase using bioinformatics methods. They are distributed on 7 chromosomes，and their evolutionary patterns are the gene duplication，sequence differences and gene deletion. With RT-PCR technique，parthenocarpic line ‘6401’and non-parthenocarpic line‘6429’were used to test the expression patterns of 9 ARF genes that were selected by their homology with genes related parthenocarpy. The results of Csa021954 and Csa012805 indicated that they were only induced in the fruits from pollination. However，Csa019265，Csa009209 and Csa009210 have more transcripts in all samples. At the same time Csa012237 and Csa015176 showed significant reduction in the early development fruits of cucumber. Furthermore，the 　　 expression of Csa019264 and Csa010564 only are in the development fruits and higher levels. Therefore，it was speculated that the these genes may play an important role in promoting fruit development of cucumber.

Key words: cucumber, parthenocarpy, ARF, gene expression, fruit, development