Cellular damages in the Allium cepa test system, caused by BTEX mixture prior and after biodegradation process

► Effects of BTEX, prior and after biodegradation, evaluated in Allium cepa test system. ► BTEX is genotoxic and mutagenic for Allium cepa cells, even at low concentrations. ► A. cepa is an efficient bioindicator of cellular damages induced by BTEX. ► Bacterial biodegradation process degrades BTEX and decreases its toxic action.