Figure 1From: In vitro growth and carbon utilization of the green-leaved orchid Dendrobium officinale are promoted by mycorrhizal associationsCulture-bottle microcosm used to supply isotopically labelled CO 2 and glucose to the orchid seedlings. Lactic acid was injected into the microtube with Ba13CO3 to liberate 13CO2 through septum in lid. Medium contained 13C-labelled glucose.Back to article page