Fig. 3From: The effects of chilling-light stress on photosystems I and II in three Paphiopedilum speciesMaximum photo-oxidizable P700 (P m ) during chilling treatment at 4 °C under photosynthetic flux densities of 500 μmol photons m−2 s−1 in three species of Paphiopedilum. Mean ± SE was calculated from six independent plants per speciesBack to article page