华南农业大学学报2018，Vol.39Issue(4)：33-38,6.DOI:10.7671/j.issn.1001-411X.2018.04.006
二氧化钛喷施剂对烤烟上部烟叶光合作用和叶绿素荧光参数的影响
Effects of titanium dioxide spraying agents on photosynthesis and chlorophyll fluorescence parameters of upper tobacco leaves
摘要
Abstract
[Objective]To explore the effect of TiO2spraying agent on photosynthesis and chlorophyll fluorescence parameters of upper tobacco leaves,and provide a reference for improving the availability of upper tobacco leaves.[Method]TiO2spraying agent was preparated by means of sol-gel method.The effects of different concentrations and formulas of TiO2spraying agent on photosynthetic pigment content,photosynthetic physiological indexes and chlorophyll fluorescence parameters of upper tobacco leaves at maturity were studied.[Result]TiO2spraying agents retarded the degradation rates of chlorophyll and carotenoid of upper tobacco leaves.The spraying agents reduced photosynthetic rate,stomatal conductance and transpiration rate of upper tobacco leaves,increased the intercellular CO2concentration in upper tobacco leaves,but leaf temperature was unaffected.Photosynthesis and chlorophyll fluorescence parameters of upper tobacco leaves were significantly affected by TiO2spraying agents.Compared with the spraying water control,the spraying agents increased Fv/Fm,Fv/Foand qP,and decreased Foand NPQ.The absorption efficiency of light intensity of tobacco leaves sprayed titanium dioxide or titanium dioxide composite graphene was the best at the concentration of 0.45 g·L–1.[Conclusion]Tobacco leaves can absorb ultraviolet(UV)to a certain extent,and the efficiency of spraying titanium dioxide composite graphene was better.There was a threshold of spraying agent concentration for light absorption efficiency.关键词
二氧化钛(TiO2)/烤烟/上部烟叶/光合作用/叶绿素荧光参数Key words
titanium dioxide (TiO2)/flue-cured tobacco/upper tobacco leaf/photosynthesis/chlorophyll fluorescence parameter分类
农业科技引用本文复制引用
邓杰,戴林建,苏招红,王建波,杨苏,周田..二氧化钛喷施剂对烤烟上部烟叶光合作用和叶绿素荧光参数的影响[J].华南农业大学学报,2018,39(4):33-38,6.基金项目
国家烟草专卖局资助项目(110201402003) （110201402003）
