摘要： 利用OS-30型叶绿素荧光分析仪研究水分胁迫对小麦旗叶叶绿素a荧光动力学参数的影响。结果表明,水分胁迫下旗叶的T1/2值减少,旗叶光系统Ⅱ(PSⅡ)原初光能转化效率(Fv/Fm)和潜在活性(Fv/Fo)降低,光合作用的潜在活力降低,这些参数下降影响了光合电子的传递和CO2同化的正常进行,表现在可变荧光淬灭速率减慢,可变荧光下降比值减小。同时还讨论了水分胁迫对灌浆速率的影响。
关键词:
水分胁迫,
小麦旗叶,
叶绿素a荧光参数,
子粒灌浆
Abstract: Effect of water stress on the chlorophyll a fluorescence parameters of fla g leaf of the wheat was s tudied with measuring result by OS-30 chlorophyl l fluorometer.The resul t indicated that the chlorophyll a fluorescence parameters of flag leaf were changed obviously under water st ress.The decrease of the time from the point Fo to the point of 1/ 2 Fv(T1/ 2), the ratio of the variable to maximal fluorescence (Fv/Fm), the rat io of the variable to minimal fluorescence (Fv/Fo), variable fluorescence quenching rate(Fv/ Fo) and Rfd(Fv/Ft ) values under water stress sugges ted the primary light energy conversion of PSò, the potential activi ties of PS ò, the potential photosynthetic activities and photosynthetic electront ransport had been inhibited.Meanwhile ef fect of grout ing rate of water st ress was discussed.
Key words:
Water stress,
Flag leaf of the wheat,
Chlorophyll afluorescence parameters,
Seed grouting
中图分类号:
张秋英, 李发东, 刘孟雨, 王纲. 不同水分条件下小麦旗叶叶绿素a荧光参数与子粒灌浆速率[J]. 华北农学报, 2003, 18(1): 26-28. doi: 10.3321/j.issn:1000-7091.2003.01.008.
ZHANG Qiu ying, LI Fa dong, LIU Meng yu, WANG Gang. Chlorophyll a Fluorescence Parameters of Flag Leaf of the Wheat and Seed Grouting under Different Water Treatments[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2003, 18(1): 26-28. doi: 10.3321/j.issn:1000-7091.2003.01.008.