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. 2022 Jan 31;9:uhab025. doi: 10.1093/hr/uhab025

Figure 5.

Figure 5

Seasonal dynamics of the photochemical performance of PSII by chlorophyll fluorescence (a, b, c, d) and transmission electron microphotographs of chlorophyll ultrastructure (e, f) in overwintering leaves of Rhododendron “Miyo-no-Sakae”. (a) Effective quantum yield of PSII (ΦII); (b) photochemical quenching (qP); (c) nonphotochemical quenching (NPQ); (d) quantum yield of nonregulated nonphotochemical quenching (ΦNO); n = 8. (e) Chlorophyll ultrastructure in January; (f) chlorophyll ultrastructure of January samples after recovery at 22°C for 6 days with a photoperiod of 14 h under a light intensity of 80 μmol m–2 s–1. The lowercase letters represent significant differences among sampling dates (p < 0.05), which were calculated using Fisher’s least significant difference test.