Understanding the differences in cool-season turfgrass responses to shade is critical for future management and breeding improved tolerance. The purpose of this study was evaluate shade-tolerance mechanisms two species terms turf performance, growth, physiological characteristics. Two species, namely, ’SupraNova’ (Poa. supina Schrad.) ‘Lark’ (Lolium perenne L.), were subjected 0 (CK, unshaded),...