Oxygen Release from Rice Seedlings

Abstract
Oxygen release from root systems of individual rice seedlings was measured polarographically employing an oxygen monitor with a Clark electrode. The oxidizing capacity of four rice varieties was correlated with their relative yielding abilities and with their reactions to Straighthead (SH) and Mild Sulfide Disease (MSD). These data support previous findings which link SH and MSD with rice‐toxic levels of soluble sulfides in Gulf Coast (U.S.A.) rice soils containing excess iron.