Urochloa grasses are widely planted in extensive areas dominated by waterlogged acidic soils characterized by poor fertility, lack of oxygen and high concentrations of Fe2+. This thesis evaluated multiple stress interactions and found that plant growth in low nutrition increased the aerenchyma development that further enabled internal oxygen transport in plants grown in low-oxygen conditions. Genotypes with longer roots in waterlogged soils had greater waterlogging tolerance. This thesis provides the first clear evidence indicating that the barrier to impede root radial oxygen loss developed by plants grown in waterlogged soils also restricts the entry of toxic concentrations of Fe into the roots.
|Qualification||Doctor of Philosophy|
|Award date||3 Sep 2020|
|Publication status||Unpublished - 2020|