Abstract: For 7-year-old Grape (Vitis vinifera ×V. labrusca cv. Fenghou) , inflorescence were treated with 6-BA at the rate of 100 , or 200 mg/ L in full bloom. The results showed that 62BA treatment markedly increased fruit set. However, there was no significant effect of 62BA treatment on fruit length (L) or fruit diameter (D), L/D ratio and total soluble solids of the fruit juice. Both 1 or 32year2old grape potted (V. vinifera ×V. labrusca cv. Jingya) were used as materials to test for the effect of 62BA on translocation and distribution of carbon (¹⁴CO₂) and nitrogen 〔¹⁴C₂Glutamic acid (¹⁴C₂Glu) 〕assimilates. The result showed that ¹⁴CO_2^-fed leaves of 12year-old‘Jingya’grape with foliar daub at the rate of 50 mg/L 6-BA inhibited translocation of ¹⁴CO_2^-assimilates from fed2 leaves. However , leaves over　14CO2 2fet leaves with foliar daub at the rate of 50 mg/ L 62BA increased translocation of ¹⁴CO_2^-assimilates from ¹⁴CO_2^-fet leaves. For 32year-old‘Jingya’grape, inflorescence were treated with 6-BA at the rate of 200 mg/ L in full bloom and it repeated 10 days after the first treatment. Translocation of ¹⁴CO_2^- assimilates or ¹⁴C_2^- Glu-assimilates from ¹⁴CO_2^- or ¹⁴C_2^-Glu2treated leaves to fruits were enhanced, distribution of ¹⁴CO_2^- or ¹⁴C_2^- Glu assimilates to stem and other leaves were decreased.

Key words: 6-BA, Grape, Fruiting, ¹⁴CO₂, ¹⁴C-Glutamic acid (¹⁴C-Glu)