Fig. 2
From: Appropriate NH4 +: NO3 − ratio improves low light tolerance of mini Chinese cabbage seedlings
Effects of NH4 +:NO3 − on chlorophyll fluorescence parameters at 9 days after treatment in mini Chinese cabbage leaves under normal (200 μmol m−2 s−1) and low (100 μmol m−2 s−1) light fluences. (a) Images of Fv/Fm. The fluorescence images of the Fv/Fm are given in false colors that represent the absolute values of the ratio ranged from 0 (black) to 1.0 (purple). Three seedlings in each treatment were measured. (b) ETR, (c) Fv/Fm, (d) ΦPSII and (e) qP. Data represent means of three area of interest from three leaves. Bars indicate the SE (n = 3). Significant differences (P < 0.05) between treatments are indicated by different letters, for each light condition