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. 2020 Sep 16;21(18):6808. doi: 10.3390/ijms21186808

Figure 7.

Figure 7

Chlorophyll fluorescence, physiological, and biochemical characteristics of transgenic Arabidopsis: (A) chlorophyll fluorescence imaging of WT and transgenic Arabidopsis under heat stress (14 days old, 42 °C, 24 h) and (B) chlorophyll fluorescence parameters of the WT and transgenic Arabidopsis under heat stress (14 days old, 42 °C, 2, 4 and 6 h) and recovery. Fv/Fm represents the Fv/Fm ratio, i.e., the maximum efficiency of photosystem II (PSII) photochemistry; ΦPSII represents the quantum yield of PSII electron transport. (C) Change of superoxide dismutase (SOD), peroxidase (POD), and catalase (CAT) activities and malondialdehyde (MDA) content in transgenic Arabidopsis under heat stress (42 °C, 6 h). (D) Expression pattern of DNA damage-related genes in transgenic Arabidopsis under heat stress: Activities are presented as mean ± standard error (n = 3). The data are mean ± SD for three separate treatments. Significant differences in the physiological and biochemical characteristics and expression level among WT, Potri.017G089800-OE, and Potri.012G002800-OE in response heat stress were determined using Fisher’s LSD test. Different letters on error bars indicate significant differences at p < 0.01.