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ROS stain of quinoa seedlings under stress treatment. (a) NBT stain for CM499 seedlings under stress treatment. (b) DAB stain for CM499 seedlings under stress treatment. The upper three rows were seedlings imaged via stereomicroscope while the bottom row was imaged using a digital photographic microscope. The arrows indicate root tips. The bars in the upper three rows are 0.5 cm while the ones in the bottom row are 500 μm.
