外源肌醇对小型西瓜耐寒性的影响

Study on Effect of Exogenous Inositol on Cold Tolerance of Mini-watermelon

为探究外源肌醇对提高小型西瓜耐寒性的效果,分别在小型西瓜育苗阶段和生长阶段进行肌醇处理,测定苗期叶面积、叶片SPAD值等生长指标,果实成熟后的品质指标。结果显示,外施肌醇对小型西瓜地上部、根系、叶片及果实生长均具有一定的促进作用,其中显著提高幼苗叶面积、叶片SPAD值、根长、根尖数、分叉数和交叉数,较清水对照分别提高48.99%、5.70%、25.62%、54.74%、30.62%和48.63%;果实单瓜重、心糖、总糖和抗坏血酸含量较对照分别提高了12.86%、13.15%、11.01%和18.67%。综上,外施肌醇能一定程度提高小型西瓜的耐寒性,减少损害,促进其生长,提高其品质。

In order to explore the effect of exogenous inositol on improving the cold tolerance of miniwatermelon,inositol treatment was carried out at the seedling stage and growth stage of mini-watermelon.The growth indexes such as leaf area and SPAD value of leaves at seedling stage and the quality indexes after fruit ripening were measured.The results showed that the application of inositol had a certain promoting effect on the growth of shoot,root,leaf and fruit of mini-watermelon.Among them,the leaf area,leaf SPAD value,root length,root tip number,bifurcation number and crossover number of seedlings were significantly increased by 48.99%,5.70%,25.62%,54.74%,30.62%and 48.63%,respectively,compared with the control of clear water.The single fruit weight,heart sugar,total sugar and ascorbic acid content were increased by 12.86%,13.15%,11.01%and 18.67%,respectively,compared with the control.In summary,external application of inositol can improve the cold resistance of mini-watermelon to a certain extent,reduce damage,promote its growth and improve quality.