A new eco-toxicity assay for aquatic plants: Eco-Tox Photosystem Tool (ETPT)

For aquatic ecosystems, a specific assay to measure the toxicity caused by a suspected harmful compound in plants has been developed (OECD Guideline 221), targeting biometric endpoints in Lemna sp. To provide a more in-depth evaluation, other physiological and biochemical traits can be investigated with additional plant material besides that used for biometric determination. ETPT measures in real time and in a nondestructive way plant growth and the physiological state of the photosynthetic apparatus, providing a large number of indices associated with toxicity endpoints linked to plant biometrics, physiology, and biochemistry.