UV-C照射采后番茄果皮细胞超微结构变化与抗病性研究  

Studies on Change of Peel Cell Ultrastructure and Disease Resistance in Harvested Tomato Fruit by UV-C Irradiation

作　　者：荣瑞芬[1] 冯双庆[2] 赵玉梅[2] 

机构地区：[1]北京联合大学师范学院,北京100011 [2]中国农业大学食品科学与营养工程学院,北京100083

出　　处：《华北农学报》2008年第3期166-169,共4页Acta Agriculturae Boreali-Sinica

摘　　要：为揭示UV-C诱导采后果蔬抗病性机制的细胞结构基础,对比观察经2.4 kJ/m2UV-C照射后存于24℃下第4天和第8天的绿熟番茄佳粉15果皮细胞超微结构变化及人工接种链格孢菌的抗病性。结果表明,UV-C处理可使果皮细胞中叶绿体等细胞器衰老延缓,细胞壁和细胞质变得致密和粘稠,电子透明度减小,中胶层分解推迟;人工接种后第3天,处理果发病率较对照降低31.67百分点,第10天降低15.27百分点,病情指数降低16.90。2.4 kJ/m2UV-C照射可提高番茄果实抗病性,增强果皮细胞壁防御能力。In order to reveal the effect of UV-C irradiation on the base of cell structure among mechanism of inducing disease resistance in postharvest fruits and vegetables, the change of peel cell uhrastructure and infection inoculation of Alternaria in harvested green tomato fruits JIAFEN 15 irradiated by 2.4 kJ/m2 UV-C were studied when storied at 24℃ at the 4th and 8th day. The results showed that disintegration and senescence of the cell organelle such as chloroplast in treated tomato peel cell were delayed as compared to the control. The cell wall and cell matrix of the fruit treated with UV- C showed to be thick and had high electron-opaque. Infection inoculation of irradiated fruits by UV-C was reduced 31.67 percentage point significantly compared to the control after inoculation 3 d and was reduced 15.27 percentage point after 10 d,the disease index was reduced 16.90 at the 10th. Disease resistance and defence of cell wall of 2.4 kJ/m2 UV-C treated fruits were enhanced.

关 键 词：短波紫外线 番茄 细胞超微结构 诱导抗病性 

分 类 号：S641.2[农业科学—蔬菜学]