Biologists have found that the roots of rezhevichi can absorb nanoplastic, — polystyrene particles penetrate the root hairs and the Central cylinder of the root. As a result of impaired expression of genes associated with protection from reactive oxygen species and the stress response, changing the morphology of the root tip and decreases the mass of the whole plant. Article published in the journal Nature Nanotechnology.
Nanoplastic found in all levels of aquatic food chains, but is found in the soil — there particles fall from sewage waters, processed fertilizers and resulting erosion plastic protective structures. It is unclear whether the land plants to absorb neoplastic, although it is known that other nanomaterials (e.g., metals and oxides) may accumulate in the roots.
Scientists from China and the United States under the leadership of Baoshan xing (Baoshan Xing) from the University of Massachusetts at Amherst synthesized nanoparticles of polystyrene (this is one of the most common types of plastic in the soil), positively or negatively charged. Nanoplastic with a diameter of 55 to 71 nanometers mixed with the soil or solid nutrient medium and cultivated in them reshowing tal (Arabidopsis thaliana).
After seven weeks of growth in soil with both types of particles, the mass of the aerial part of rezekvitek was less than half the stalks shorter, and the content of chlorophyll lower than those of control plants (p < 0.05). In a nutrient medium with nanoplastic growth was slowed (p < 0.05). In both cases, the effect of positively charged particles was greater than the negative.