【摘要】 以兰州地区常见的两个番茄品种同辉(早熟型)和霞光(晚熟型)为实验材料,模拟当地12%和20%臭氧层减薄时增强的UV-B辐射量2.54KJ·m-2.d-1和4.25 KJ·m-2.d-1,初步探讨了增强UV-B辐射对大田条件下两种番茄果实产量和品质的影响.结果表明:同辉番茄的产量随辐射增加而明显增加,霞光番茄产量只在低辐射下增加;两种辐射造成同辉果实番茄红素下降,Vc无明显变化;霞光番茄红素在低辐射下增加,高辐射时下降,Vc含量变化相反.比较两种番茄对增强UV-B辐射的响应,就果实产量而言,早熟的同辉品种更具抗性,而晚熟的霞光品种更敏感.更多还原

【Abstract】 This paper studied the effects of ebhanced UV-B radiation on fruit yield and quality of two tomato cultivars,Tonghui(TH) and Xiaguang(XG),which differ in ripen date.When exposed to ambient(as a control),ambient plus 2.54 KJ m-2 d-1(T1) and 4.25 KJ m-2 d-1(T2) of ultraviolet-B radiation(respective simulating a 12% and 20% ozone depletion of Lanzhou at summer solstice,36° N,103° E) under field condition,the yield was increased markedly in Tonghui cultivar by two doses of UV-B radiation while the yield was increased in Xiaguang cultivar under T1 treatment.Contents of lycopene declined and Vc did not changed in TH cultivar under two UV-B treatments.In XG cultivar,lycopene concentration increased by low UV-B radiation and decreased by high UV-B treamentment.Meanwhile,changes of Vc contents were opposite to the lycopene.In term of fruit yield,it is likely that TH cultivar is tolerant and XG cultivar is more sensitive to supplemental UV-B radiation comparing to the different response to enhanced UV-B irradiation between two tomato cultivars.更多还原