highly significantp < 0.001
Detailed analysis (Figure 3 ) showed that the UV effect on both sWUE and eWUE was nonsignificant ( p > 0.05) under saturating ( > 1000 μmol m –2 s –1 ) intensities of photosynthetically active radiation (PAR), but highly significant ( p < 0.001) under non‐saturating PAR intensities.