Soil waterlogging impedes roots, as O2 is low and CO2 is high. Root internal aeration and growth of chickpea and faba bean were studied. Chickpea had low root porosity (small primary aerenchyma) which restricted internal O2 supply, whereas faba bean had higher root porosity (primary and secondary aerenchyma) and greater O2 supply. Low O2, elevated ethylene and high CO2 all reduce growth. Both species showed poor recovery after low O2 and high CO2 in the root-zone. The sensitivity of grain legumes to low O2 and high CO2 should be tested for more genotypes, to aid the development of future breeding strategies.
|Qualification||Doctor of Philosophy|
|Award date||4 Apr 2017|
|Publication status||Unpublished - 2016|