Abstract: In order to improve the effect of grape fruit coloring,the optimum concentration of ALA in solar greenhouse was discussed. In the enlargement and coloring period of the Flame seedless fruit,the use of 5-aminolevulinic acid 50,100,150 mg/L(ALA) spraying fruit,to investigate the effects of ALA treatment on color,quality and anthocyanin synthesis related enzyme activity of grape fruit appearance. The results showed that during the fruit ripening,the treatment of exogenous ALA could induce the accumulation of anthocyanin,promote the colouring of peel,and alleviate the degradation rate of chlorophyll and carotenoids; The content of soluble sugar in fruit increased significantly,and the content of titration decreased obviously. After treatment with ALA,the anthocyanin content of the peel was significantly correlated with PAL activity,there was no significant correlation with DFR activity,CHI activity was significantly related only after the treatment and the content of anthocyanin,but after treatment of ALA,PAL,CHI,DFR activity in pericarp than control had different degrees of improvement,by hypothesizing that the expression of ALA by upregulating the related regulation the factor to induce synthesis of anthocyanin accumulation,thereby improving fruit appearance and internal quality.

Key words: 5-aminolevulinic acid (ALA), Grape, Pericarp coloring, Quality, PAL, CHI, DFR

CLC Number: 

• S663.01