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Instantaneous water use efficiency (AN/E) (A) and intrinsic water use efficiency (AN/gs) (B) in the self-grafted pepper plants (V/V) and the plants grafted onto NIBER® (V/N) at 0% PEG (control, C) or 5% PEG (water stress, WS). Measurements were taken on T0 and T48 (hours after treatment with PEG began). Data are the mean values for n = 4. For each studied time, different letters indicate significant differences at P ≤ 0.05 (LSD test).
