Figure 6.
Correlation between the total dry weight (TDW) (A) or malondialdehyde production (MDA) (B) and the relative tolerance index (RTI) (C), and the decrease in the maximum quantum efficiency of PSII (DQE) (D) in lulo (Solanum quitoense Lam.) plants exposed to drought and sprayed with 1, 2, 4 and 8 mL·L−1 of brassinosteroid analogue (DI-31) at 80 days after transplanting (DAT). Bars and points represent the mean of five data ± standard error (n = 5). Bars followed by different letters indicate statistically significant differences according to the Tukey test (p ≤ 0.05).