| Summary: | Cadmium (Cd) is not considered a fundamental element for plants inducing general growth disturbances and inhibition in many species of plants. The purpose of our research was to examine the ethylene (C<sub>2</sub>H<sub>4</sub>) and ammonia (NH<sub>3</sub>), emissions in alfalfa sprouts with or without Cd, using infrared laser photoacoustic spectroscopy (IR LPAS), in order to suggest new markers that may add a better knowledge of Cd effect. The responses of alfalfa sprouts to C<sub>2</sub>H<sub>4</sub> and NH<sub>3</sub> may fluctuate, depending on tissue sensitivity and the phase of plant development. From the determinations of this study, the C<sub>2</sub>H<sub>4</sub> was established to be inhibited, while NH<sub>3</sub> was established to be in a higher concentration with the amount of Cd added to the alfalfa seeds for growth when the values were correlated to the control and BIOalfalfa sprouts (Sonnentor).
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