There many available papers on stress tolerance, kindly check below reference as an example
Degl’Innocenti, E., Hafsi, C., Guidi, L., and Navari-Izzo, F., 2009. “The effect of salinity on photosynthetic activity in potassium deficient barley species,” Journal of Plant Physiology, vol. 166, no. 18, pp. 1968–1981.