Effects Of Tomato Hormone Setting On Sugar Metabolism And Fruit Quality

The quality of greenhouse tomato is closely related to setting methods.In order to solve the problem that the quality and flavor of greenhouse tomato were poor,three kinds of fruit setting methods were designed,vibro-setting,natural setting and hormone setting.The results showed that:The total sugar content of the first spike was 50% higher than that of hormone setting by vibration setting and natural setting,and 71% higher than that of the second spike and 71% higher than that of the third spike.The contents of starch,fructose and sucrose in the mature stage were 12.73%,51.52% and7.26% higher in the first ear than in the hormone setting,75.14%,34.4% and 12.05% higher in the second ear,and the results in the third ear were similar.Hormone setting greatly reduced the enzyme activity during fruit ripening.Sucrose synthase and sucrose phosphate synthase were 15%,25% and 11% lower in the first,second and third ear fruits,respectively.Neutral invertase and acid invertase were 47%,29% and 29% lower,respectively.In the mature stage,the steroid setting was the most important,but the difference between natural setting and vibration setting was not significant.However,the contents of soluble solids,Vc and total acids in the fruits were the lowest among the fruits setting with hormones.The fruits of the first three ears were12%,23% and 18% lower on average,respectively.The growth rate of steroid-setting tomato fruits was fast,the fruit was large,the yield was high,the hardness was high,and the single fruit weight was increased.The yield of vibration setting was high and the difference with hormone setting was not significant.It was concluded that hormone setting could increase yield but decrease fruit quality.Vibratory setting can meet the requirement of high yield without lowering fruit quality.