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Photosynthesis Responses of Tibetan Freshwater Algae Chlorella vulgaris to Herbicide Glyphosate

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  • Yixiao Zhang

    (School of Science, Tibet University, Lhasa 850000, China
    Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China)

  • Zixu Chen

    (Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China
    School of Resource & Environmental Science, Wuhan University, Wuhan 430072, China)

  • Xiaoyan Li

    (Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China)

  • Xinguo Wu

    (School of Resource & Environmental Science, Wuhan University, Wuhan 430072, China)

  • Lanzhou Chen

    (School of Resource & Environmental Science, Wuhan University, Wuhan 430072, China)

  • Gaohong Wang

    (School of Science, Tibet University, Lhasa 850000, China
    Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China)

Abstract

With the development of agriculture and the widespread application of agrichemicals in Tibet, herbicide residues have become a threat to the ecological safety of Tibetan water bodies. Algae, as the producers in the food chain in water bodies, play an important role in aquatic ecosystems. Therefore, the impact of herbicides on Tibetan algae is of great significance for evaluating ecological health and the protection of Tibetan water ecosystems. In this study, we investigated the inhibitory effect of glyphosate, a herbicide, on the photosynthetic system of Chlorella vulgaris , Tibetan algae, by determining chlorophyll fluorescence and the activity of an antioxidant system. The results revealed that glyphosate at low concentration did not affect the photosynthetic activity of C. vulgaris ; however, glyphosate at a high concentration significantly inhibited photosynthetic activity and reduced pigment content. Moreover, high levels of glyphosate also decreased photochemical efficiency and electron transport rate and resulted in ROS accumulation, high SOD activity, and lipid peroxidation. These results suggested that glyphosate could decrease the primary production of aquatic ecosystems and influence their performance. Therefore, reducing the herbicide levels could protect the Tibetan aquatic environment and maintain the health of ecosystems.

Suggested Citation

  • Yixiao Zhang & Zixu Chen & Xiaoyan Li & Xinguo Wu & Lanzhou Chen & Gaohong Wang, 2022. "Photosynthesis Responses of Tibetan Freshwater Algae Chlorella vulgaris to Herbicide Glyphosate," IJERPH, MDPI, vol. 20(1), pages 1-11, December.
    • Handle: RePEc:gam:jijerp:v:20:y:2022:i:1:p:386-:d:1015923
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    References listed on IDEAS

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    1. Camacho, Adriana & Mejía, Daniel, 2017. "The health consequences of aerial spraying illicit crops: The case of Colombia," Journal of Health Economics, Elsevier, vol. 54(C), pages 147-160.
    2. Xiuhong Wang & Yili Zhang, 2019. "Emergy-Based Evaluation of Changes in Agrochemical Residues on the Qinghai–Tibet Plateau, China," Sustainability, MDPI, vol. 11(13), pages 1-12, July.
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