叶绿素荧光是光合作用研究的探针.ppt

Fig.2 Effect of chilling treatment (4 ?C ) under an irradiance of 100 μmol m-2 s-1 on the oxidizable P700 in sweet pepper leaves. ▲, chilling treatment under irradiance; ?, chilling treatment in the dark. Leaves were dark adapted for 15 min prior to measurement. Each point represents the mean ? SD of 3 measurements on separate leaves. 第31页，共64页，2022年，5月20日，3点33分，星期四 Fig.3 Responses of the relationship between ?PSII and ?CO2 and Pn-PFD curves to chilling treatment under irradiance and subsequent recovery. Both chlorophyll a and net photosynthetic rate were measured under 25 ?C. Subsequent recovery was conducted at 25 ?C under 100 ? mol m-2 s-1 PFD. (A) The relationship between ?PSII and ?CO2 determined in NA; (B) Pn-PFD curves determined in NA; (C) The relationship between ?PSII and ?CO2 determined in LOA; (D) Pn-PFD curves determined in LOA. ▲, CK; ?, post-treatment; ■, recovery for 8 hours; ?, recovery for 32 hours; ?, recovery for 49 hours. 第32页，共64页，2022年，5月20日，3点33分，星期四 Fig.4 Responses of the relationship between ?PSII and ?CO2 and Pn-PFD curves to chilling treatment in the dark and subsequent recovery. Both chlorophyll fluorescence and the photosynthesis rate were measured at 25 ?C. Subsequent recovery was conducted at 25 ?C and 100 ? mol m-2 s-1 PFD. (A) The relationship between ?PSII and ?CO2 determined in NA; (B) Pn-FPD curves determined in NA; (C) The relationship between ?PSII and ?CO2 determined in LOA; (D) Pn-PFD curves determined in LOA. ▲, CK; ?, post-treatment; ?, recovery for 8 hours. 第33页，共64页，2022年，5月20日，3点33分，星期四 Fig.1 Effects of chilling stress on the maximum photochemical efficiency of PSII (Fv/Fm) of tobacco. Leaf discs were exposed to 100 μmol m-2 s-1 PFD at 4 ?C (▲, Wild type; Δ, ΔndhB) and 100 μmol m-2 s-1 PFD at 25 ?C (●, Wild type; ○, ΔndhB), respectively. Chl fluorescence was measured after 5 min dark adaptation. Each point represents the mean ? SD of 5 measurements on separate leaves. 第34页，共64页，2022年，5月20日，3点33分，星期四 Fig.3 Time course of