Effect of Different Rootstocks on the Sugar and Vtamin C Content in Watermelon Fruit

The sugar and Vc content of L600,xiaohongyu,203Z,and Hongwei watermelon grafted on pumpkin,gourd,wild watermelon and Xiaogan gourd watermelon were studied.The total sugar,fructose,glucose,sucrose,total vitamin C(TAA),reduced vitamin C(AA) and oxidized vitamin C(DHAA) content of matured watermelon fruit were analyzed.The results showed that the effect of pumpkin rootstock on the growth potential of watermelon plants was the most significant and the second was Xiaogan gourd.Additionally,the effect of different rootstocks on sugar and vitamin C content of watermelon fruit is different.The total sugar and sucrose contents using pumpkin rootstock decreased observably,but the Vc content did not decrease.The sucrose and Vc content using gourd rootstock was obviously effected.Total sugar and fructose content of wild watermelon as rootstock declined,but the Vc content did not changed.The sugar and Vitamin C content of Xiaogan gourd as rootstock did not decline and the glucose contents of all watermelon varieties with different rootstocks had no significant change,too.