FIGURE 10.

Effect of HT stress on lipid peroxidation and superoxide levels in different Arabidopsis plants. (A) Lipid peroxidation expressed as MDA content in seedlings of WT, Δb2, TaB2 -OE, and CΔb2 lines grown for 21 days on MS medium after heat stress given at 42°C for 2 h. (B) 2-week-old Arabidopsis leaf samples were stained for accumulation of ${\mathrm{O}}_{\mathrm{2}}^{\mathrm{•–}}$ by NBT staining after 2 h of heat stress treatment at 40°C. Photographs were taken in stereo microscope Leica DFC 290 HD. Asterisks marked above bars indicate statistically significant differences (^∗P ≤ 0.05, ^∗∗P ≤ 0.01).