土壤水分对新疆加工番茄叶绿素荧光参数日变化的影响  

Effect of Soil Water Content on Diurnal Changes of Chlorophyll Fluorescence Parameter of Tomato in Xinjiang

作　　者：冯胜利[1] 马富裕[1] 方志刚[1] 王冀川[1] 

机构地区：[1]石河子大学新疆兵团绿洲生态农业重点实验室,新疆石河子832003

出　　处：《华北农学报》2007年第5期71-75,共5页Acta Agriculturae Boreali-Sinica

基　　金：国家自然科学基金资助项目(30560068);石河子大学高层次人才科研启动资金专项(RCZX200522)

摘　　要：在新疆气候生态条件下,以加工番茄(Lycopersicon esculentumMill)为材料,研究土壤水分对加工番茄叶片叶绿素荧光参数日变化的影响。结果表明,最大荧光(Fm),可变荧光(Fv),最大光化学效率(Fv/Fm),PSⅡ的潜在活性(Fv/Fo)日变化均呈高-低-高的变化趋势,固定荧光(Fo)和表观光合电子传递速率(ETR)日变化均呈低-高-低的变化趋势,其中Fm,Fv,Fv/Fo,Fv/Fm在16:00时降到最低,Fo在16:00时达到最高,ETR在13:00时达到最高。随着土壤水分的降低,Fm,Fv,Fv/Fo,Fv/Fm降低,Fo和ETR增加,表明水分胁迫使加工番茄叶片光系统Ⅱ受到伤害,光系统Ⅱ原初光能转换效率、光系统Ⅱ潜在活性受到抑制。The experiments were made with tomato. It was studied that effect of soil water content on diurnal changes of chlorophyll fluorescence parameter of tomato. The results indicated that maximum fluorescence （ Fm）, variable fluorescence（Fv）, the ratio of the variable to maximum fluorescence（ Fv/Fm）, the ratio of the variable to minimal fluorescence （Fv/Fo）varied in a high-low-high shape manner, while the minimal fluorescence（Fo） and the electron transport rate （ETR） varied in a low-high-low shape manner, Fm, Fv, Fv/Fm, Fv/Fo reached their lowest points at 16 ： 00, Fo reached its highest point t 16：00, ETR reached its highest point at 13：00. Under water stress, Fm, Fv, Fv/Fm, Fv/Fo decreased, while Fo and ETR raise. Analysis indicated that photosystem n damaged, and primary light energy conversion of PS n （ Fv/Fm）, potential activities of PS Ⅱ （Fv/Fo） decreased, photosythetic primary action inhibited.

关 键 词：加工番茄 叶绿素荧光 日变化 土壤水分 新疆 

分 类 号：S641.2[农业科学—蔬菜学]