Fig. 7From: The effects of chilling-light stress on photosystems I and II in three Paphiopedilum speciesLight response curves for Y(I) (a, d); Y(NA) (b, e) and Y(ND) (c, f) from three species of Paphiopedilum after 8 h chilling stress. Mean ± SE was calculated from six independent plants per speciesBack to article page