[Truncated] This study evaluated the physiological, morphological and anatomical responses of young wheat plants (21 d old) to different depths (soil waterlogged at the surface, or to 100 or 200 mm soil depth) and different durations (3, 7, 14, 21 and 28 d) of soil waterlogging. Recovery from these different waterlogging situations was also assessed. The aeration mechanisms of adventitious roots with only the apical few cm exposed to 02-deficiency were also studied in hydroponics. During waterlogging, the growth of wheat was reduced proportionally to the depth of waterlogging. Root growth was more reduced than shoot growth in all treatments during waterlogging (6-27% for shoot, 15-74% for roots). During recovery, plants invested more biomass in the root system to restore their original root-shoot ratio. As a result, the relative growth rate (RGR) of roots was faster than that of shoots during the recovery period (shoot RGR 48-84, root RGR 106-110 mg g-1 d-1).
|Qualification||Doctor of Philosophy|
|Publication status||Unpublished - 2002|