In a study on Peperomia carnevalii, water deficit stress decreased ФPSII and qP but increased NPQ (Herrera, 2000).
In this study, the NPQ value increased with increasing light intensity and water deficit stress severity.
Environmental stresses, especially high light intensities make the electron transfer chain saturated and increase proton accumulation, therefore NPQ would increase (Müller et al., 2001; Lambrev et al., 2012; Porcar-Castell et al., 2014).