FIGURE 7.

Heat stress analysis of IbOr overexpressing transgenic sweetpotato. 1-month-old sweetpotato plants were subjected to heat stress (47°C) for 24 h, followed by 72 h recovery. Three biological and three technical replicates were performed for each data point. (A) Phenotypes of 1-month-old EV and IbOr plants before and after heat treatment. (B) Fluorescence-based maximum quantum yield of PSII (Fv/Fm) and (C) relative chlorophyll contents (Chl) in the third leaves of EV and IbOr plants after 24 h heat stress and 72 h recovery. Data represent three independent experiments. Asterisks indicate significant differences: ^∗∗P < 0.01 (t-test).