Tiny nanoplastic fragments present in soil can make their way into the edible parts of vegetables, research has found.
A team of scientists from the University of Plymouth in the UK placed radishes into a hydroponic (water-based) system containing polystyrene nanoparticles.
After five days, almost 5 percent of the nanoplastics had made their way into the radish roots. A quarter of those were in the edible, fleshy roots, while a tenth had traveled up to the higher leafy shoots, despite anatomical features within the plants that typically screen harmful material from the soil.
"Plants have a layer within their roots called the Casparian strip, which should act as a form of filter against particles, many of which can be harmful," says physiologist Nathaniel Clark.
"This is the fir