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<p>Surface or ground waters are heavily contaminated with numerous toxic substances. One of the emerging contaminants is the Microplastics (MP). MPs are polymers smaller than 5&#xa0;mm in diameter, which are harmful. Plants are affected in terms of growth inhibition and photosynthetic pigment reduction. <i>Chlorella</i> and <i>Lemna mino</i>r are freshwater algae and floating plants, respectively, which are considered a good source of protein for humans and fish due to their high protein content and environmentally friendly production properties. The study aimed to investigate the effect of the plastic microspheres on <i>Lemna mino</i>r and <i>Chlorella</i>. The plastic microspheres were exposed to <i>Chlorella</i> and duckweed for 21 and 14&#xa0;days, respectively. The effects of different doses of microspheres on the growth, photosynthetic pigments, algal cell density, root length, number, and root cell viability were assessed. The growth rate, content of photosynthetic pigments, algal cell density, root length, and root growth have been reduced with an increase in the dose of MP concentration. Evan’s blue staining provided evidence for the incorporation of MPs deep into the layers of roots. It can be concluded that the microspheres can negatively impact floating organisms of freshwater ecosystems.</p>

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A short-term preliminary experimental study on the effect of microplastics on Chlorella vulgaris and duckweeds

  • 期刊论文

  • 发表日期：

    2026年2月2日

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  • Amritha Pozhaiparambil Sasikumar,
  • Veena Vinod,
  • Harathi Parsur Babu

摘要

Surface or ground waters are heavily contaminated with numerous toxic substances. One of the emerging contaminants is the Microplastics (MP). MPs are polymers smaller than 5 mm in diameter, which are harmful. Plants are affected in terms of growth inhibition and photosynthetic pigment reduction. Chlorella and Lemna minor are freshwater algae and floating plants, respectively, which are considered a good source of protein for humans and fish due to their high protein content and environmentally friendly production properties. The study aimed to investigate the effect of the plastic microspheres on Lemna minor and Chlorella. The plastic microspheres were exposed to Chlorella and duckweed for 21 and 14 days, respectively. The effects of different doses of microspheres on the growth, photosynthetic pigments, algal cell density, root length, number, and root cell viability were assessed. The growth rate, content of photosynthetic pigments, algal cell density, root length, and root growth have been reduced with an increase in the dose of MP concentration. Evan’s blue staining provided evidence for the incorporation of MPs deep into the layers of roots. It can be concluded that the microspheres can negatively impact floating organisms of freshwater ecosystems.