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Joint effects of naphthalene and microcystin-LR on physiological responses and toxin bioaccumulation of Landoltia punctata.
Yang, Gui-Li; Huang, Meng-Jun; Tan, Ai-Juan; Lv, Shi-Ming.
Afiliación
  • Yang GL; College of Life Sciences, Guizhou University, Guiyang 550025, China; Key Laboratory of Conservation and Germplasm Innovation of Mountain Plant Resources, Ministry of Education, Guiyang 550025, China. Electronic address: glyang3@gzu.edu.cn.
  • Huang MJ; Chongqing Key Laboratory of Environmental Materials & Remediation Technologies, Chongqing University of Arts and Sciences, Chongqing 402160, China.
  • Tan AJ; College of Life Sciences, Guizhou University, Guiyang 550025, China; Key Laboratory of Conservation and Germplasm Innovation of Mountain Plant Resources, Ministry of Education, Guiyang 550025, China.
  • Lv SM; College of Animal Science, Guizhou University, Guiyang 50025, China. Electronic address: lvlvsm@163.com.
Aquat Toxicol ; 231: 105710, 2021 Feb.
Article en En | MEDLINE | ID: mdl-33338701
The co-contamination of naphthalene (NAP) and microcystin-LR (MC-LR) commonly occurs in eutrophic waters. However, the joint effects of NAP and MC-LR on plants in aquatic environments remain unknown. Landoltia punctata is characterized by high starch yields and high biomass in polluted waters and has been proven to be a bioenergy crop and phytoremediation plant. In this study, L. punctata was cultured in a nutrient medium with environmentally relevant NAP (0.1, 1, 3, 5, and 10 µg/L) and MC-LR (5, 10, 25, 50, and 100 µg/L) to determine individual and joint toxic effects. The effects of NAP and MC-LR on physiological responses of L. punctata, including growth, starch accumulation, and antioxidant responses, were studied. Bioaccumulation of MC-LR in L. punctata, with or without NAP, was also examined. The results showed that growth and chlorophyll-a contents of L. punctata were reduced at high concentrations of MC-LR (≥ 25 µg/L), NAP (≥ 10 µg/L) and their mixture (≥ 10 + 1 µg/L) after exposure for 7 d. Starch accumulation in L. punctata did not decrease when exposed to NAP and MC-LR, and higher starch content of 29.8 % ± 2.7 % DW could be due to the destruction of starch-degrading enzymes. The antioxidant responses of L. punctata were stronger after exposure to MC-LR + NAP than when exposed to a single pollutant, although not enough to avoid oxidative damage. NAP enhanced the bioaccumulation of MC-LR in L. punctata when NAP concentration was higher than 5 µg/L, suggesting that higher potentials of MC-LR phytoremediation with L. punctata may be observed in NAP and MC-LR co-concomitant waters. This study provides theoretical support for the application of duckweed in eutrophic waters containing organic chemical pollutants.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Contexto en salud: 12_ODS3_hazardous_contamination / 3_ND Problema de salud: 12_water_sanitation_hygiene / 3_dracunculiasis Asunto principal: Araceae / Microcistinas / Toxinas Marinas / Naftalenos Idioma: En Revista: Aquat Toxicol Asunto de la revista: BIOLOGIA / TOXICOLOGIA Año: 2021 Tipo del documento: Article

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Contexto en salud: 12_ODS3_hazardous_contamination / 3_ND Problema de salud: 12_water_sanitation_hygiene / 3_dracunculiasis Asunto principal: Araceae / Microcistinas / Toxinas Marinas / Naftalenos Idioma: En Revista: Aquat Toxicol Asunto de la revista: BIOLOGIA / TOXICOLOGIA Año: 2021 Tipo del documento: Article
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