Response of chlorophyll fluorescence characteristic of Trifolium repens L. to water stress | 白三叶叶片荧光特性对水分胁迫的响应
2010
Han Jianqiu, Shanghai Institute of Technology, Shanghai（China）, School of Ecological Technology and Engineering
[Objective] The aim was to study response of chlorophyll fluorescence parameters in Trifolium repens L. leaves to water stress from perspective of physiology. [Method] With T. repens cultivar “Haifa” as tested material, three soil water content levels were set to culture plants, including 75% (no stress, CK), 50% (moderate stress, LD) and 25% (severe stress, HD), the effects of water stress on chlorophyll fluorescence parameters were determined. [Result] The results showed that the chlorophyll fluorescence parameters changed a little when the relative soil moisture content was 75% and 50%, while the chlorophyll fluorescence parameters such as conversion efficiency of primary light energy (Fv/Fm) of PSⅡ,the photochemical quenching coefficient (qP) and the quantum yield of PSⅡ electron transport (φPSⅡ) decreased respectively when the relative soil moisture content was 25%. [Conclusion] When T. repens in severe drought conditions, the physiological functions were damaged, showing symptoms of drought injury.
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