We can't find the internet
Attempting to reconnect
Something went wrong!
Hang in there while we get back on track
Macro- and microplastic leachates show a slightly toxic effect on seed germination of cotton
Summary
Researchers tested the effects of leachates from macro- and microplastics of three different polymer types and degradation states on cotton seed germination, finding slight but measurable phytotoxicity from degradable mulching film leachates, with effects varying by plastic type and size.
Utilizing degradable mulching film effectively decreases the accumulation of plastic residuals in agriculture fields and their impacts on plant growth. However, the chemical risks to plants raised by leached substances from different microplastics are still unknown. This work determined the characteristics of macro- and microplastic leachates from different degradation (PE, PO, and Bio) and size (1 × 1 cm, 450-600 μm and <355 μm), as well as their impact on the germination of two varieties of cotton seeds. Our study revealed that degradable characteristics of macro-plastic significantly affect its leachates. Leachates of Bio gained higher dissolved organic carbon (DOC) concentration, aromatic, and values of slope ratios (S) compared with PO and PE. The particle size of Bio macro- and microplastics also influences indicators such as S, E/E, E/E and Fmax value; however, fluctuations of those indicators were significantly lower than that induced by different degradable traits. Leachates of PE, PO, and Bio seem to have little impact on the germination of two varieties of cotton seeds, only mean germination time (MGT) and shoot height were slightly different among each treatment. A slight fluctuation of enzyme activities also indicates that plastic leachate did not generate excessive oxidative stress in cotton during germination. Leachates of macro- and microplastic under the tested concentration exhibited a slight toxic impact on cotton, which has high-stress tolerance. Thus, further studies should concentrate on the effects of plastic leachate on sensitive plants.
Sign in to start a discussion.
More Papers Like This
Effects of Polyamide Microplastics with Different Concentrations on Cotton Seed Germination and Seedling Growth
Researchers exposed cotton seedlings to polyamide microplastics at varying concentrations, finding dose-dependent inhibition of seed germination and seedling growth, adding cotton to the list of staple agricultural crops susceptible to microplastic phytotoxicity.
Impact of plastic mulch and their associated leachates on seed germination
This study examined how plastic mulch films and their chemical leachates affect seed germination, finding that both the physical presence of plastic fragments and dissolved additives from weathered mulch can reduce germination rates in exposed crops.
[Characterization of Microplastic Leachate from Different Polymers and Its Effect on Seed Germination of Lettuce].
Chemicals leached from polyamide and polyethylene microplastic fibers were found to reduce seed germination vigor in lettuce, though they did not affect plant height or root length. Polyamide leachate contained higher levels of dissolved organic matter compared to polyethylene leachate.
Macro- and microplastics leachates: Characterization and impact on seed germination
This study found that chemicals leaching out of plastic mulch films used in farming — not the plastic particles themselves — are what harm seed growth. Biodegradable plastics actually released higher concentrations of these chemicals than conventional plastics. Many of the leached compounds have no safety regulations, raising concerns about the chemicals that microplastics release into soil where food is grown.
Lolium multiflorum germination and growth affected by virgin, naturally, and artificially aged high-density polyethylene microplastic and leachates
Researchers found that virgin, naturally aged, and artificially aged high-density polyethylene microplastics and their leachates negatively affected Lolium multiflorum germination and growth, with aged microplastics and their chemical leachates showing greater phytotoxicity than virgin particles.