经细胞学观察发现 ,转反义PG基因番茄果实在不同成熟期及存放前后 ,其果皮外面几层细胞的厚度都比未转基因的厚 1～ 5 μm ,细胞结构、细胞质和细胞核等的状态都有明显区别。尤以贮存后更为明显 ,未转基因果实的果皮细胞结构解体、细胞质凝聚、细胞核变的模糊程度都比转基因的严重。经外源乙烯处理后 ,转基因和未转基因果实的细胞结构也有相似的变化。结果表明 :反义PG基因的转入降低了PG活性 ,并且减弱了外源乙烯的作用 ,延缓了果实的衰老 ,提高了耐贮性能 ,从而起到果实保鲜作用 Cytological observation showed that the thickness of several layers of anther anther PG gene was 1 ~ 5 μm thick and the cell structure, cytoplasm, nucleus and so on were different at different mature stages and before and after storage There are obvious differences. Especially after storage more obvious, non-transgenic fruits of the pericarp cell structure disintegration, cytoplasm aggregation, nuclear ambiguity than the genetically modified serious. After exogenous ethylene treatment, the cellular structure of transgenic and non-transgenic fruits also had similar changes. The results showed that the transfection of antisense PG gene decreased the activity of PG and decreased the effect of exogenous ethylene, delayed the fruit senescence and improved the storability of the fruit, thus played a role in preservation of fruits