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为了解萼片对番茄果实发育及品质形成的影响,做2组试验。试验1:分别在初花后10、15、20、25、30、35和40d去除萼片,以不去萼片的正常果实为对照,在果实转色6d后(成熟期)采摘,进行分析测定。试验2:分别在花后25、30和35d及转色和成熟期采摘果实,去除萼片,以相同时期不去萼片的正常果实为对照,采后放置25℃贮藏室内观察测定。试验1的结果表明处理果实成熟时间延迟;重量、抗氧化物质Vc和类黄酮含量下降;细胞壁构成物质的水溶性果胶、共价结合果胶及总果胶含量都有所下降。在抗氧化酶活性方面,处理果实中的CAT活性低于对照,而POD活性高于对照;糖酸比低于对照,但可溶性固形物含量与对照组差异不显著。试验2的结果表明在花后30d之前,去除萼片处理果实的乙烯产量与对照相比减少了一半。而在花后35d以后,处理与对照间的乙烯产量无显著差异。综上,萼片对番茄果实的发育、成熟及品质形成起着促进作用。
In order to understand the influence of sepal on tomato fruit development and quality formation, do two groups of experiments. Test 1: The sepals were removed at 10, 15, 20, 25, 30, 35 and 40 days after initial flowering, respectively. The normal fruits without sepals were taken as control and harvested after 6 days of fruit color change (mature stage). Test 2: The fruits were picked at 25, 30 and 35 days after anthesis and during color conversion and maturity respectively. The sepals were removed, and the normal fruits of sepals were not taken as control at the same time. After harvest, they were stored at 25 ℃ for storage. The results of Experiment 1 showed that the ripening time of fruits was delayed; the contents of Vc and flavonoids, the weight, antioxidants and the content of water-soluble pectin, covalently bound pectin and total pectin decreased. In terms of antioxidant enzyme activity, the activity of CAT in the treated fruits was lower than that of the control, while the activity of POD was higher than that of the control. The ratio of sugar to acid was lower than that of the control. However, the content of soluble solids was not significantly different from that of the control. The results of trial 2 show that by 30 days after anthesis ethylene production by the sedum-removed fruits was reduced by half compared to the control. After 35 days after anthesis, there was no significant difference in ethylene production between treatments and controls. In summary, sepals on tomato fruit development, maturation and quality formation plays a catalytic role.