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Menicagli V, Ruffini Castiglione M, Cioni E, Spanò C, Balestri E, De Leo M, Bottega S, Sorce C, Lardicci C. Stress responses of the seagrass Cymodocea nodosa to environmentally relevant concentrations of pharmaceutical ibuprofen: Ecological implications. JOURNAL OF HAZARDOUS MATERIALS 2024; 476:135188. [PMID: 39024758 DOI: 10.1016/j.jhazmat.2024.135188] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/17/2024] [Revised: 07/06/2024] [Accepted: 07/10/2024] [Indexed: 07/20/2024]
Abstract
Pharmaceuticals like ibuprofen (IBU) entering marine environments are of great concern due to their increasing consumption and impact on wildlife. No information on IBU toxicity to seagrasses is yet available. Seagrasses form key habitats and are threatened worldwide by multiple stressors. Here, the responses of the seagrass Cymodocea nodosa to a short-term exposure (12 days) to environmentally realistic IBU concentrations (0.25-2.5-25 µg L-1), both at organism (plant growth) and sub-organism level (oxidative status, photosynthetic efficiency, and specialized metabolites production), were assessed in mesocosm. Chemical analyses to detect the presence of IBU and its metabolites in seawater and plants were also performed. IBU did not affect plant growth but caused physiological alterations which varied in severity depending on its concentration. Concentrations of 0.25 and 2.5 µg L-1 resulted in oxidative stress, but an increased antioxidant enzyme activity enabled plants to tolerate stress. A concentration of 25 µg L-1 caused greater oxidative stress, reduced antioxidant enzyme activity and specialized metabolites production, and impaired photosynthetic machinery functioning (particularly PSII). IBU was detected in seawater but not in plants suggesting no bioaccumulation. These findings indicate that C. nodosa could not withstand high IBU stress, and this could reduce its resilience to additional environmental stressors.
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Affiliation(s)
- Virginia Menicagli
- Department of Biology, University of Pisa, via L. Ghini 13, 56126 Pisa, Italy
| | - Monica Ruffini Castiglione
- Department of Biology, University of Pisa, via L. Ghini 13, 56126 Pisa, Italy; Center for Instrument Sharing University of Pisa (CISUP), University of Pisa, Lungarno Pacinotti 43-44, 56126 Pisa, Italy; Center for Climate Change Impact, University of Pisa, Via Del Borghetto 80, 56124 Pisa, Italy
| | - Emily Cioni
- Department of Pharmacy, University of Pisa, Via Bonanno Pisano 33, 56126 Pisa, Italy
| | - Carmelina Spanò
- Department of Biology, University of Pisa, via L. Ghini 13, 56126 Pisa, Italy; Center for Climate Change Impact, University of Pisa, Via Del Borghetto 80, 56124 Pisa, Italy
| | - Elena Balestri
- Department of Biology, University of Pisa, via L. Ghini 13, 56126 Pisa, Italy; Center for Instrument Sharing University of Pisa (CISUP), University of Pisa, Lungarno Pacinotti 43-44, 56126 Pisa, Italy.
| | - Marinella De Leo
- Center for Instrument Sharing University of Pisa (CISUP), University of Pisa, Lungarno Pacinotti 43-44, 56126 Pisa, Italy; Department of Pharmacy, University of Pisa, Via Bonanno Pisano 33, 56126 Pisa, Italy
| | - Stefania Bottega
- Department of Biology, University of Pisa, via L. Ghini 13, 56126 Pisa, Italy
| | - Carlo Sorce
- Department of Biology, University of Pisa, via L. Ghini 13, 56126 Pisa, Italy; Center for Climate Change Impact, University of Pisa, Via Del Borghetto 80, 56124 Pisa, Italy
| | - Claudio Lardicci
- Center for Instrument Sharing University of Pisa (CISUP), University of Pisa, Lungarno Pacinotti 43-44, 56126 Pisa, Italy; Center for Climate Change Impact, University of Pisa, Via Del Borghetto 80, 56124 Pisa, Italy; Department of Earth Sciences, University of Pisa, via S. Maria 53, 56126 Pisa, Italy
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Taenzer L, Toth G, Hansel CM. Assessment of hydrogen peroxide as a bioindicator of stress in seaweed aquaculture. Sci Rep 2024; 14:1956. [PMID: 38263423 PMCID: PMC10806984 DOI: 10.1038/s41598-024-52182-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2023] [Accepted: 01/15/2024] [Indexed: 01/25/2024] Open
Abstract
The rapid expansion in commercial seaweed farming has highlighted the need for more effective monitoring methods, and health diagnostics. The production of the reactive oxygen species (ROS) hydrogen peroxide (H2O2) is a trait that is tied to all major macroalgal groups and holds significance both for its involvement in the oxidative stress response and in the production of climatically relevant gases such as halocarbons. Observations of increased production of H2O2 by plants as a stress response, along with its comparative stability and ease of quantification in seawater in comparison to other ROS, suggest that H2O2 could be used as an indicator of health. In this study we characterized aqueous H2O2 dynamics across a diel cycle, in response to small shifts in light and temperature, as well as when exposed to acute stress. Our results reveal that exposure to acute stressors leads to rapid and sustained concentrations of H2O2 that are orders of magnitude higher than changes in H2O2 concentrations observed throughout the day. These findings provide tantalizing evidence that monitoring H2O2 could be used as a health indicator in seaweed aquaculture and serve as an early warning sign of stress.
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Affiliation(s)
- Lina Taenzer
- Department of Marine Chemistry and Geochemistry, Woods Hole Oceanographic Institution, Woods Hole, MA, 02543, USA
- Department of Earth, Atmospheric and Planetary Science, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
| | - Gunilla Toth
- Department of Marine Sciences, University of Gothenburg, Strömstad, Sweden
| | - Colleen M Hansel
- Department of Marine Chemistry and Geochemistry, Woods Hole Oceanographic Institution, Woods Hole, MA, 02543, USA.
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Asaeda T, Rashid MH, Liping X, Vamsi-Krishna L, Barnuevo A, Takeuchi C, Rahman M. The distribution of submerged macrophytes in response to intense solar radiation and salinity reveals hydrogen peroxide as an abiotic stress indicator. Sci Rep 2023; 13:4548. [PMID: 36941279 PMCID: PMC10027660 DOI: 10.1038/s41598-023-30487-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2022] [Accepted: 02/24/2023] [Indexed: 03/23/2023] Open
Abstract
The feasible condition for submerged macrophyte growth is hard to understand as many environmental factors contribute to establishing macrophyte distribution with different intensities generating excess reactive oxygen species (ROS). Among various kinds of ROS, hydrogen peroxide (H2O2) is relatively stable and can be measured accurately. Thus, for the quantification of submerged macrophyte species, H2O2 can be used to evaluate their distribution in a lake. Submerged macrophytes, such as Potamogeton anguillanus, were abundant in Lake Shinji. The largest biomass distribution was around 1.35 m deep, under low solar radiation intensity, and nearly no biomass was found less than 0.3 m deep, where solar radiation was high. Tissue H2O2 concentrations varied in response to the diurnal photosynthetically active radiation (PAR) intensity, which was followed by antioxidant activities, though slightly delayed. Laboratory experiments were conducted with different PAR intensities or salinity concentrations. A stable level of H2O2 was maintained up to about 200 μmol m-2 s-1 of PAR for 30 days, followed by a gradual increase as PAR increased. The H2O2 concentration increased with higher salinity. A change in Chlorophyll a (Chl-a) concentration is associated with an altering H2O2 concentration, following a unique negative relationship with H2O2 concentration. If H2O2 exceeded 45 μmol/gFW, the homeostasis collapsed, and H2O2 and Chl-a significantly declined afterward. The above findings indicate that H2O2 has a negative effect on the physiological condition of the plant. The increase in H2O2 concentration was prevented by antioxidant activities, which elevated with increasing H2O2 concentration.
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Affiliation(s)
| | - Md Harun Rashid
- Department of Agronomy, Bangladesh Agricultural University, Mymensingh, Bangladesh
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