Fig. 4From: The effects of chilling-light stress on photosystems I and II in three Paphiopedilum speciesLight response curves for Y(II) (a); Y(NO) (b); Y(NPQ) (c) and NPQ (d) from three species of Paphiopedilum at 25 °C. Mean ± SE was calculated from six independent plants per speciesBack to article page