Fig. 1.

Rates of radial O₂ loss along intact long adventitious roots of rice in O₂-free medium with shoots in air, at 28 °C (mean ± s.e., n = 3). Plants were raised for 3–4 weeks in aerated nutrient solution, prior to transfer to stagnant deoxygenated agar nutrient solution for 5 d or aerated nutrient solution for 5 d. Lengths of adventitious roots (mean ± s.e., n = 3) were 154 ± 1 mm in aerated and 159 ± 3 mm in stagnant deoxygenated agar nutrient solution.