Abstract
One of rice cultivars, Oryza glaberrima has been thought as unfavorable environment resistance. However, the physiological adaptation of Oryza glaberrima to water stresses is not understood. The physiological response of Oryza glaberrima to flash floods was studied.
This experiment was conducted in Guinea from May to June in 2006. Saligbeli (Oryza glaberrima), Ballawe and IR 49830-7-1-2-2 (Oryza sativa) were used. The seedlings at 12 days old were submerged completely for 7 days at 1 m water depth.
Saligbeli and Ballawe elongated the leaf sheath after submergence, which resulted in the significant higher shoot elongation than that of IR 49830-7-1-2-2. Before submergence, the ratio of the root to the shoot of Saligbeli was higher than that of other cultivars, but the ratio became the same level ratio of other cultivars during submergence, suggesting that Saligbeli maintains the upper part growth by changing the distribution of dry matter weight during submergence.
