纳米TiO_2光半导体溶胶对植物光合机能的影响  

Effects of Nano-TiO_2 Photosemiconductor on Photosynthesis of Cucumber Plants

作　　者：张萍[1] 崔海信[2] 张志娟[3] 钟儒刚[1] 

机构地区：[1]北京工业大学生命科学与生物工程学院,北京100124 [2]中国农业科学院农业环境与可持续发展研究所,北京100081 [3]河南师范大学生命科学学院,河南新乡453007

出　　处：《中国农学通报》2008年第8期230-233,共4页Chinese Agricultural Science Bulletin

基　　金：国家863计划(2006AA10A203)。

摘　　要：TiO2半导体颗粒的光催化机理类似于人工模拟光合作用,笔者初步探讨了其在植物体上对光合机能的影响;以锐钛型纳米TiO2光半导体溶胶为材料,在栽培试验中,对黄瓜喷施不同浓度的纳米TiO2溶胶,然后测定光合参数、根系活力及叶片丙二醛含量的变化;结果表明,黄瓜叶片喷施一定浓度的纳米TiO2溶胶材料后,在叶片表面形成透明、连续、稳定的TiO2薄膜,能显著促进光合速率的增加,同时根系活力得到提高。这为纳米TiO2光半导体材料在农业上的应用提供了一定的理论依据和技术参考。The mechanism of TiO2 semiconductor photocatalysis had similarity with artificial photosynthesis.The effects of nano-TiO2 photosemiconductor sol on the photosynthesis of cucumber plants had been firstly reported in this paper.Anatase TiO2 semiconductor used in the experiment was synthesized by sol-gel methods,and its effects on photosynthesis,activities of root systems and contents of leaf cell malondialdehyde had been studies after spray different concentration of nano-TiO2 sol on cucumber leaves in culturing experiments.The experimental results showed that nano-TiO2 sol could form perfectly adhesive,transparent,continuing and stable films on the surfaces of leaves by which net photosynthetic rates and activities of root system had been significantly promoted.These results provided some scientific and technical references for application of nanomaterials which using TiO2 as effective ingredients in agricultural research.

关 键 词：纳米 TIO2 光半导体 光合作用 

分 类 号：Q6[生物学—生物物理学]