Abstract: The influence of film-forming antitranspirant on the ripening process of Vitis vinifera L. ‘Cabernet Sauvignon’was investigated. The film-forming antitranspirant Vapor Gard（active ingredient is di-1-p-menthene，a therpenic polymer，also known as pinolene）was sprayed to the clusters at onset of grapevine berry ripening. The results showed that the film-forming antitranspirant had no prominent influence on the diameter and the weight of berry at the early mature stage，but compared to the control，the reducing sugar content，soluble solids content and total phenol content significantly decreased，while the acid content was enhanced under the film-forming antitranspirant treatment. Moreover，the drop of fruit turgor and berry coloring was postponed under the treatment. Furthermore，the expression level of the key genes in the fruit anthocyanins synthesis pathway was down-regulated under the treatment，as the results，compare to the control，the total anthocyanins content and the proportion of the acylation anthocyanins were reduced. Therefore，it was speculated that the treatment might reduce the water transpiration of berry to sustain the berry turgor，and consequently，the berry coloring and the ripening process was markedly delayed. Hence，the film-forming antitranspirant can be used to regulate the developmental process of grape fruit.

Key words: wine grape, film-forming antitranspirant, fruit；firmness, ripening, anthocyanins