冬、春季节柑桔叶片光合机构运转的研究  

Operation of photosynthetic apparatus of citrus leaves in winter and spring.

作　　者：曾光辉[1] 郭延平[1] 王法格[2] 吴振旺[2] 

机构地区：[1]浙江大学园艺系,浙江杭州310029 [2]温州市农科院,浙江温州325006

出　　处：《浙江大学学报（农业与生命科学版）》2006年第4期410-414,共5页Journal of Zhejiang University:Agriculture and Life Sciences

基　　金：国家自然科学基金资助项目(39970525)

摘　　要：冬、春柑桔光合作用的最适温度不同,春季光合作用的最适温度高于冬季,而且冬季柑桔光合作用的最适温度远远高于环境温度,冬季柑桔的净光合速率(Pn)、Rubisco活性、RuBP再生速率、表观量子效率(AQY)、PSⅡ最大光化学效率(Fv/Fm)、光下的光化学效率(Fv′/Fm′)、光化学猝灭系数(qP)及电子传递速率(ETR)较低,PSⅡ反应中心失活或破坏,细胞间隙CO2浓度与环境CO2浓度比值(Ci/Ca)、非光化学猝灭系数(qN)较高.这些结果表明,柑桔光合作用的最适温度与环境温度变化相适应,冬季低温是限制柑桔光合作用的主要因子;光合碳代谢和光化学反应受低温限制是冬季光合作用较低的重要原因.Optimum temperature for photosynthesis of citrus leaves planted in field was lower in winter than in spring, and it was higher than environmental temperature in winter. In the winter, the net photosynthetic rate （Pn）, Rubisco activity, rate of RuBP regeneration, apparent quanturn yield （AQY）, photochemical efficiency of PSⅡ （Fv/Fm）, photochemical efficiency under light （Fv＇/Fm＇）, photochemical quenching coefficient （qP）, and electron transport rate （ETR）were lower, but the ratio of internal CO2 concentration （Ci）to air CO2 concentration （Ca）, and non-photochemical quenching coefficient （qN）were higher, PSⅡ reaction centers were reversibly inactivated or damaged. These results indicated that the optimum temperature for photosynthesis of citrus leaves was adaptable to the changing natural environmental temperature. Low temperature in winter limited photosynthetic carbohydrate metabolism and photochemical reaction caused low photosynthesis.

关 键 词：柑桔 光合 叶绿素荧光 光合机构 温度 

分 类 号：S666.1[农业科学—果树学]