Cadmium (Cd) is a nonessential heavy metal that presents a great environmental problem due to its high toxicity to all living organisms. Cadmium can obstruct plant germination, growth, and production mainly associated with the physiological, biochemical and genetic elements of the plant system. The aim of our study was to monitor the ammonia (NH3), ethylene (C2H4), ethanol (C2H5OH) and carbon dioxide (CO2) biomolecules emissions in Triticum aestivum plantlets growth with or without Cd, using photoacoustic spectroscopy in order to suggest new markers that may contribute to a better understanding of Cd phytotoxicity. At the same time, common wheat roots were imaged using fluorescence microscopy and the chemical composition analysis of the plantlet surfaces was determined using X-ray photoelectron spectroscopy. Photoacoustic spectroscopy results show that seeds germinated with Cd, determine a slowly increase of NH₃ vapors in the respiration of plantlets, a decrease of C₂H₄, and a greater increase of C₂H₅OH and CO₂ vapors in the respiration of Triticum aestivum. In the same time, through all techniques employed we were able also to distinguish between Triticum aestivum plantlets treated or not with Cd.

镉（Cd）是一种不必要的重金属，由于对所有生物都具有高毒性，因此会带来很大的环境问题。镉会阻碍植物的发芽，生长和生产，主要与植物系统的生理，生化和遗传因素有关。我们的研究目的是监测普通小麦中氨（NH3），乙烯（C2H4），乙醇（C2H5OH）和二氧化碳（CO2）生物分子的排放。使用光声光谱法研究有无Cd的小植株生长，以便提出可能有助于更好地了解Cd植物毒性的新标记。同时，使用荧光显微镜对普通小麦的根进行成像，并使用X射线光电子能谱确定幼苗表面的化学成分。光声光谱结果表明，种子与Cd萌发，决定了幼苗呼吸中NH ₃蒸气的缓慢增加，C ₂ H ₄的减少，以及C ₂ H ₅ OH和CO ₂蒸气的较大增加。普通小麦。同时，通过使用的所有技术，我们还能够区分使用或不使用镉处理过的普通小麦苗。