The effects of ultrasonic irradiation on sprouting radish seed

The author experimentally confirmed that by using ultrasonic irradiation, radish vegetable seeds immersed in water germinate and grow more rapidly than without irradiation. The ultrasonic intensity level was low enough not to generate thermal action caused by ultrasound propagation, which is generated by a piezoelectric 30-mm-diameter ceramic transducer which operates at a resonant frequency of 700 kHz and is excited by 0.38 W of electric power. In one vessel of styrofoam filled with water, radish seeds are immersed and the transducer is set up in front of the seeds. Another vessel is prepared to observe seeds growing naturally under water, at room temperature. The length of the root ultrasonically was 13% to 16% longer than the one grown naturally.<>