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Biodegradable nanoplastics pose a greater risk: Polylactide exceeds polystyrene in phytotoxicity and bioaccumulation in lettuce
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Researchers compared the uptake, translocation, and phytotoxicity of polylactic acid (PLA) biodegradable nanoplastics versus conventional polystyrene nanoplastics in lettuce, finding that PLA accumulated at higher levels and caused greater growth inhibition — challenging the assumption that biodegradable plastics are safer.
This dataset supports the research article entitled “Biodegradable nanoplastics pose a greater risk: Polylactide exceeds polystyrene in phytotoxicity and bioaccumulation in lettuce”. The study investigated the uptake, translocation, phytotoxicity, and plant defense mechanisms in lettuce (Lactuca sativa L.) exposed to conventional polystyrene (PS) and biodegradable polylactic acid (PLA) nanoplastics (NPs). The data comprise five main categories: Nanoparticle Characterization: Data on the physicochemical properties of the pristine and europium (Eu)-labeled PS and PLA particles, including hydrodynamic diameter, zeta potential, and confirmation of chemical structure via Raman spectroscopy. Excitation and emission spectra validate the fluorescent properties of Eu-labeled particles for tracking. Plant Phenotype and Growth Parameters: Data on biomass, root and shoot length, and root system architecture of lettuce after 14 days of exposure to PS and PLA particles at concentrations of 0, 1, 5, 10, and 20 mg/L. Physiological and Biochemical Indicators: Measurements of photosynthetic pigment content (chlorophyll a, b, carotenoids), oxidative stress markers (MDA content), and antioxidant enzyme activities (SOD, POD, CAT). Quantification of NPs in Plants: Data from inductively coupled plasma mass spectrometry (ICP-MS) measuring Eu content in plant tissues (root, stem, leaf). This includes the standard curve correlating Eu mass to NPs mass, and the resulting calculated concentrations of PS-Eu and PLA-Eu particles in all tissues, bioconcentration factor (BCF), and translocation factors (TLF). This also includes quantitative data on root suberization and lignification. These data provide direct evidence for the higher bioavailability and phytotoxicity of biodegradable PLA NPs compared to conventional PS NPs, revealing associated plant defense responses. They are critical for understanding the fate of nanoplastics in plants and for the environmental risk assessment of biodegradable plastics.
More Papers Like This
Biodegradable nanoplastics pose a greater risk: Polylactide exceeds polystyrene in phytotoxicity and bioaccumulation in lettuce
AI summary Read the abstract
Researchers compared the uptake, translocation, and phytotoxicity of polylactic acid (PLA) biodegradable nanoplastics versus conventional polystyrene nanoplastics in lettuce, finding that PLA accumulated at higher levels and caused greater growth inhibition — challenging the assumption that biodegradable plastics are safer.
Biodegradable nanoplastics pose a greater risk: Polylactic acid exceeds polystyrene in phytotoxicity and bioaccumulation in lettuce
AI summary Read the abstract
"Biodegradable" plastics, often marketed as the eco-friendly choice, may actually be worse for plants than regular plastic. In this study, tiny biodegradable plastic particles (from a common compostable plastic called PLA) built up in lettuce roots, stems, and leaves at much higher levels than traditional plastic particles, causing more cell damage and stunting growth. Since lettuce and other produce absorb these particles from soil, this raises questions about whether switching to biodegradable plastics could unintentionally increase plastic buildup in the food we eat.
The Degradability of Microplastics May Not Necessarily Equate to Environmental Friendliness: A Case Study of Cucumber Seedlings with Disturbed Photosynthesis
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This study compared the effects of biodegradable polylactic acid (PLA) microplastics and conventional polystyrene microplastics on cucumber seedlings. Surprisingly, the biodegradable PLA particles caused more harm, significantly reducing plant growth and disrupting the photosynthesis system. The results suggest that switching to biodegradable plastics may not eliminate the microplastic problem, since these particles can still damage crops and potentially affect food production.
Responses of lettuce (Lactuca sativa L.) growth and soil properties to conventional non-biodegradable and new biodegradable microplastics
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Scientists compared the effects of biodegradable and conventional polyethylene microplastics on lettuce growth and soil health. Both types of microplastics reduced plant growth, damaged photosynthesis, and altered soil nutrient levels, but biodegradable PBAT microplastics actually caused more disruption to soil microbial communities. The findings challenge the assumption that biodegradable plastics are necessarily safer for agricultural ecosystems.
Chronic toxicity of biodegradable microplastic (Polylactic acid) to Daphnia magna: A comparison with polyethylene terephthalate
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Scientists compared the toxicity of biodegradable PLA microplastics with conventional PET microplastics on water fleas and found that PLA was actually more harmful. At higher concentrations, PLA microplastics killed nearly half the organisms, reduced reproduction, and increased birth defects more than PET particles did. This challenges the assumption that biodegradable plastics are safer for the environment, suggesting they may pose similar or even greater ecological risks than conventional plastics.
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