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以盆栽三年生银杏实生苗为试材,研究了叶绿素荧光参数对温度变化的响应。结果表明:在5—30℃之间,Fo、Fm、Fv/Fm几乎没有变化,表明在此温度范围内叶片没有受到光抑制。φEo和ψo随着温度降低而逐渐下降,表明降低温度使得PSII反应中心受体侧相对电子传递速率降低。以室温25℃为对照,无论温度降低或升高,RC/CS均上升,而ABS/RC、TRo/RC、ETo/RC及DIo/RC均下降。说明25℃为银杏叶片进行光化学反应的最适温度。总之,5—30℃之间的温度对PSII电子传递速率和PSII反应中心能量分配影响很小。
Taking potted three-year-old ginkgo seedlings as test material, the responses of chlorophyll fluorescence parameters to temperature changes were studied. The results showed that there was almost no change in Fo, Fm and Fv / Fm between 5-30 ° C, indicating that the leaves were not photo-suppressed at this temperature range. φEo and ψo gradually decreased with decreasing temperature, indicating that decreasing the temperature led to a decrease in the relative electron transfer rate at the receptor side of the PSII reaction center. At room temperature of 25 ℃, RC / CS increased and ABS / RC, TRo / RC, ETo / RC and DIo / RC decreased no matter the temperature decreased or increased. Explain 25 ℃ for the ginkgo leaf photochemical reaction temperature. In summary, the temperature between 5-30 ° C has little effect on PSII electron transfer rate and PSII reaction center energy distribution.