Aerenchyma Formation in Adventitious Roots of Tall Fescue and Cocksfoot under Waterlogged Conditions

The formation of aerenchyma in adventitious roots is one the most crucial adaptive traits for waterlogging tolerance plants. Pasture grasses, like other crops, can be affected by waterlogging, and there scope to improve through breeding. In this study, two summer-active cocksfoot (Dactylis glomerata L.) cultivars, Lazuly Porto, tall fescue (Lolium arundinaceum Schreb., syn. Festuca arundinacea Schreb.) Hummer Quantum II MaxP, were selected investigate effects on root growth morphological change. Cultivars subjected four periods treatments (7, 14, 21 28 days), while comparable plants kept under free drained control conditions. experiment was arranged as a split–split plot design, with (waterlogged, control) considered main plots, time (days waterlogging) subplots cultivars sub-subplots. Plants began show signs stress 14–21 days after onset treatments. There no significant differences shoot biomass between waterlogged any cultivar. However, significantly reduced dry matter all greater reduction (56%) than (38%). Waterlogging also led increased both species. Cocksfoot showed increase roots, had proportion aerenchyma. Both within each species similar responses an extended screening program needed identify whether are varietal species, which could used discover genes related or (waterlogging tolerance) use breeding programs.