外源一氧化氮对NaCl胁迫下番茄幼苗光合特性的影响  

Effects of exogenous nitric oxide on photosynthetic characteristics of tomato seedlings under NaCl stress

作　　者：吴雪霞[1] 朱为民[2] 朱月林[1] 陈建林[2] 

机构地区：[1]南京农业大学园艺学院,南京210095 [2]上海市农业科学院园艺研究所上海市设施园艺技术重点实验室,上海201106

出　　处：《植物营养与肥料学报》2007年第6期1105-1109,共5页Journal of Plant Nutrition and Fertilizers

基　　金：教育部高校博士点基金(20030307020);江苏省科技厅项目(BC2003306;BE2002304);教育部留学回国人员科研启动基金[(2001)498]资助

摘　　要：在100 mmol/L NaCl胁迫下,研究了外源NO供体硝普钠(SNP)处理对番茄(Lycos 641.2. persicon esculentumMill.)幼苗光合作用光响应曲线、CO2响应曲线等光合特性的影响。结果表明,在NaCl胁迫下,外源NO显著提高了番茄幼苗叶片净光合速率(Pn)、蒸腾速率(Tr)和气孔导度(Gs),降低了胞间CO2浓度(Ci);显著提高了光饱和点(LSP)、光饱和光合速率、表观量子效率(AQY)、CO2饱和点(CSP)、羧化效率(CE)、RuBP最大再生速率;显著降低了光补偿点(LCP)、CO2补偿点(CCP);同时提高了叶片叶绿素含量。以上结果表明,外源NO能改善番茄幼苗NaCl胁迫下的光合作用,从而增强植株的耐盐性。The effects of sodium nitropprusside （SNP, an exogenous nitric oxide donor） on photosynthesis- light response curve and CO2 response curve in seedlings of tomato（ Lycopersicon esculentum Mill. ）were investigated under 100 mmol/L NaCl stress condition. The results showed that net photosynthetic rate （Pn）, transpiration rate （Tr） and stomatal conductance （Gs） were significantly increased, intercellular CO2 concentration （Ci） were markedly decreased, light saturation point （LSP）, photosynthetic rate at light saturation point, apparent quantum yield （AQY）, CO2 saturation point （CSP）, carboxylation efficiency （CE） and maximum RuBP regeneration rate were markedly increased, light compensation point （LCP）, CO2 compensation point （CCP） were significantly decreased by the treatment of exogenous nitric oxide under NaCl stress. In addition, the chlorophyll contents were significantly enhanced. The above results indicated that exogenous nitric oxide donor （SNP） could improve photosynthesis of tomato seedlings under NaCl stress and increase salt tolerance of plants.

关 键 词：一氧化氮 NACL胁迫 番茄 光合特性 

分 类 号：S641.2[农业科学—蔬菜学] Q945.78[农业科学—园艺学]