From the first to fifth DAWW, ITE of
390 WS plants remained stable (approximately 7.3), while ITE of
750 WS plants increased approximately 83% (from 10.1 to 18.5).
Higher ITE under elevated CO2 level was potentially important in
ameliorating negative impacts of water deficit on cassava. Higher
ITE of water stressed plants cultivated under elevated CO2 was
due to both increased Pn and reduced gs. Higher Pn resulted from
higher ambient CO2, while reduced gs could have resulted from
both high CO2 as well as a response to drought stress.