Morphophysiological Responses of Two Cool-Season Turfgrasses with Different Shade Tolerances

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), 35% (LS), 70% (MS), 92% (HS) shade, respectively. Compared with ‘Lark’, ‘SupraNova’ showed better quality (TQ) color intensity (TCI) under shade. total length surface area roots gradually decreased as increased, while those increased then increasing chlorophyll fluorescence photochemical quenching coefficient (qP), electron transport rate (ETR), maximum quantum yield primary photosystem II (PSII) photochemistry (Fv/Fm) significantly HS; however, these decreases more significant than ‘SupraNova’. leaf reflectance turfgrasses lower that CK, but higher visible light band. normalized difference vegetation index (NDVI) grasses first increased. NDVI slightly CK. strong tolerance on basis malondialdehyde (MDA), hydrogen peroxide (H2O2), superoxide anion (O2·?), ascorbic acid (AsA) contents dismutase (SOD), peroxidase (POD), catalase (CAT) activity. MDA, H2O2, O2·?, AsA SOD, POD, CAT activity (which represent indicators) changed most MS. Taken together, results indicated adaptability ‘Lark’.