Laser photoacoustic trace detection of C2H4 revealing adverse environmental effects of atmospheric pollution on plant material

Frans J. M. Harren; Luciana Petruzzelli

doi:10.1117/12.140249

9 March 1993 Laser photoacoustic trace detection of C₂H₄ revealing adverse environmental effects of atmospheric pollution on plant material

Frans J. M. Harren, Luciana Petruzzelli

Author Affiliations +

Proceedings Volume 1716, International Conference on Monitoring of Toxic Chemicals and Biomarkers; (1993) https://doi.org/10.1117/12.140249
Event: Environmental Sensing '92, 1992, Berlin, Germany

Abstract

The photoacoustic detection method for trace gases in the atmosphere is well developed towards very low limits of detection, in the last years. Due to the combination of a sensitive photoacoustic cell placed intracavity in an infrared CO₂ laser we were able to detect C₂H₄ at ultralow (< 1:10¹¹) concentrations within 10 seconds, C₂H₄ in a plant hormone which seems to play an important role throughout all the life stages of a plant, including seed germination. In addition, various types of stress have been reported to promote ethylene production from different plant tissues. As part of our ongoing research on the role of ethylene in seed germination, we have compared our laser photoacoustic set-up to a gaschromatograph for measuring C₂H₄ produced by germinating Pisum sativum L. seeds within the first days of imbibition. C₂H₄ evolution by intact seeds shows a maximum at about 25 hours of germination. Thereafter, the rate of ethylene measured by gaschromatograph continues to decrease while that measured by the laser-driven photoacoustic system shows further increases. Most of the ethylene produced by seeds is found in isolated embryonic axes. The fumigation with ozone affects the growth of seedlings and their ethylene evolution.

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Frans J. M. Harren and Luciana Petruzzelli "Laser photoacoustic trace detection of C₂H₄ revealing adverse environmental effects of atmospheric pollution on plant material", Proc. SPIE 1716, International Conference on Monitoring of Toxic Chemicals and Biomarkers, (9 March 1993); https://doi.org/10.1117/12.140249

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