不同砧木对西瓜果实中糖和Vc含量的影响

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

选用不同砧木对不同西瓜品种进行嫁接,分析嫁接后果实中糖和Vc含量的变化。采用南瓜、葫芦、野生西瓜和瓠子为砧木,分别对L600、小红玉选、203和红伟无籽等4个西瓜品种进行嫁接,果实成熟后测定总糖、果糖、葡萄糖、蔗糖、总Vc、还原型Vc和氧化型Vc的含量。结果表明,南瓜对生长势有明显促进作用,瓠子仅次于南瓜;不同砧木品种嫁接对不同西瓜品种果实中糖和Vc含量的影响不同,其中南瓜嫁接后,果实中总糖和蔗糖含量显著降低,Vc含量无明显降低;葫芦仅对蔗糖含量有影响,但对Vc含量的影响较明显;野生西瓜使总糖和果糖含量有下降,Vc含量无下降;孝感瓠子对糖和Vc含量影响最小;不同砧木对葡萄糖含量均无显著影响。

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.