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Kreusch M, Poltronieri E, Bouvie F, Pereira DT, Batista D, Ramlov F, Maraschin M, Bouzon ZL, Simioni C. Cellular Responses of Gelidium floridanum (Gelidiales, Rhodophyta) Tetraspores Under Heat Wave and Copper Pollution. JOURNAL OF PHYCOLOGY 2019; 55:1394-1400. [PMID: 31519045 DOI: 10.1111/jpy.12921] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2019] [Accepted: 08/29/2019] [Indexed: 06/10/2023]
Abstract
Spore settlement and development are bottlenecks for resilience of habitat-forming macroalgal species. These processes are directly related to temperature, a global stressor protagonist of ocean warming. The toxic effects of local pollutants such as copper may be worsened under a global warming scenario. Therefore, in this paper, we investigated the effects of increased temperature combined with elevated concentrations of copper on the viability, photosynthetic pigments, and ultrastructure of Gelidium floridanum tetraspores. Tetraspores were cultivated on slides with sterilized seawater or seawater enriched with CuCl2 , and incubated under 24°C or 30°C for 24 h. Tetraspores cultivated with copper 3.0 μM under 30°C had lower viability. Both temperature and copper had a significant effect on phycocyanin and phycoerythrin concentrations. Samples cultivated with copper under 30°C presented a heavily altered cellular structure, with vesicles throughout the cytoplasm, chloroplasts with altered structure and cells with degenerated cytoplasm and cell walls. Our findings show that temperature and copper significantly affect the viability, photosynthetic pigments, and ultrastructure of G. floridanum tetraspores, presenting an additive interaction for the physiology of this seaweed's early stages.
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Affiliation(s)
- Marianne Kreusch
- Plant Cell Biology Laboratory, Department of Cell Biology, Embryology and Genetics, Federal University of Santa Catarina, 88049-900, CP 476, Florianópolis, Santa Catarina, Brazil
| | - Elisa Poltronieri
- Plant Cell Biology Laboratory, Department of Cell Biology, Embryology and Genetics, Federal University of Santa Catarina, 88049-900, CP 476, Florianópolis, Santa Catarina, Brazil
| | - Fernanda Bouvie
- Plant Cell Biology Laboratory, Department of Cell Biology, Embryology and Genetics, Federal University of Santa Catarina, 88049-900, CP 476, Florianópolis, Santa Catarina, Brazil
| | - Débora T Pereira
- Plant Cell Biology Laboratory, Department of Cell Biology, Embryology and Genetics, Federal University of Santa Catarina, 88049-900, CP 476, Florianópolis, Santa Catarina, Brazil
| | - Deonir Batista
- Plant Cell Biology Laboratory, Department of Cell Biology, Embryology and Genetics, Federal University of Santa Catarina, 88049-900, CP 476, Florianópolis, Santa Catarina, Brazil
| | - Fernanda Ramlov
- Plant Morphogenesis and Biochemistry Laboratory, Federal University of Santa Catarina, 88049-900, CP 476, Florianópolis, Santa Catarina, Brazil
| | - Marcelo Maraschin
- Plant Morphogenesis and Biochemistry Laboratory, Federal University of Santa Catarina, 88049-900, CP 476, Florianópolis, Santa Catarina, Brazil
| | - Zenilda L Bouzon
- Plant Cell Biology Laboratory, Department of Cell Biology, Embryology and Genetics, Federal University of Santa Catarina, 88049-900, CP 476, Florianópolis, Santa Catarina, Brazil
| | - Carmen Simioni
- Plant Cell Biology Laboratory, Department of Cell Biology, Embryology and Genetics, Federal University of Santa Catarina, 88049-900, CP 476, Florianópolis, Santa Catarina, Brazil
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Hydroponic Lettuce Production Using Treated Post-Hydrothermal Liquefaction Wastewater (PHW). SUSTAINABILITY 2019. [DOI: 10.3390/su11133605] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Post-hydrothermal liquefaction wastewater (PHW) is a byproduct of the hydrothermal liquefaction (HTL) process. Previous research indicates that PHW is free of pathogens and contains nutrients needed for crop growth, but may contain metal(loid)s. This study evaluated the ability of differentially treated PHW for effective and safe hydroponic lettuce production. Water containing only hydroponic fertilizer (Source Water 1) had the highest total dry yield of all five treatments; 3.1 times higher than Source Water 2 (diluted PHW with sand filtration), 3.5 times higher than Source Water 3 (diluted PHW with sand + carbon filtration), 2.6 times higher than Source Water 4 (diluted and nitrified PHW with sand filtration), and 1.3 times higher than Source Water 5 (diluted PHW supplemented with hydroponic fertilizer). Findings also indicated that while PHW was below the US Department of Agriculture Foreign Agriculture Service maximum levels for cadmium, lead, and mercury in food, the concentration of arsenic was 1.6, 2.4, and 2.0 times higher than the maximum level for Source Waters 2, 3, and 4, respectively. There was no detectable E. coli or fecal coliforms in any of the treated PHW. While nitrogen was present in the raw PHW, only 0.03% was NO3-N and NO2-N. Diluted PHW supplemented with hydroponic fertilizer had lower lettuce yield than hydroponic fertilizer alone, indicating a potential non-nutrient inhibition of plant growth by PHW. Therefore, this research demonstrates that treated PHW does not pose a biological contamination risk for lettuce, but may entail levels of arsenic in edible leaf tissues that are in excess of safe levels. Additional treatment of PHW can benefit crop production by allowing crop utilization of a greater fraction of total nitrogen in the raw PHW.
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Hudon C, Gagnon P, Poirier Larabie S, Gagnon C, Lajeunesse A, Lachapelle M, Quilliam MA. Spatial and temporal variations of a saxitoxin analogue (LWTX-1) in Lyngbya wollei (Cyanobacteria) mats in the St. Lawrence River (Québec, Canada). HARMFUL ALGAE 2016; 57:69-77. [PMID: 30170723 DOI: 10.1016/j.hal.2016.06.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2016] [Revised: 05/31/2016] [Accepted: 06/05/2016] [Indexed: 06/08/2023]
Abstract
The concentration of the saxitoxin analogue LWTX-1 was quantified in samples of the benthic filamentous cyanobacterium Lyngbya wollei (Farlow ex Gomont) Speziale and Dyck collected in two fluvial lakes of the St. Lawrence River (Canada) over the 2006-2013 period. The study was aimed at documenting the spatial (between fluvial lakes, between sites within each lake) and temporal (inter-annual, monthly) variations of toxin concentration in relation with hydrological (water level), physical (water temperature, conductivity, transparency), chemical (nutrients in overlying water) and biological (L. wollei biomass and mat condition) characteristics. Toxin concentration was hypothesized to vary seasonally with biomass accumulation and environmental conditions. Toxin concentrations measured in Lake Saint-Louis (51±40μg LWTX-1g-1 DM, N=29 days in 2007, 2009-2011) were double those in Lake Saint-Pierre (25±31μg LWTX-1g-1 DM, N=26 days in 2006-2008, 2012-2013); however, August 2007 measurements taken from both lakes did not differ significantly. Ten of the twelve highest values (>100μg LWTX-1g-1 DM) were obtained from Lake Saint-Louis, between April and October in 2007, 2010 or 2011. Under ice samples showed intermediate concentrations of LWTX-1 (42±9μg LWTX-1g-1 DM, N=2). Concentrations of LWTX-1 were positively correlated with Secchi depth (r=0.59, p<0.001), L. wollei biomass (Spearman r=0.31, p<0.01) and %N in filaments (r=0.48, p<0.001), suggesting toxin production was linked to mat growth and metabolism rather than water quality. Although LWTX-1 has been reported to have a low toxicity, monitoring of L. wollei abundance is required to assess the environmental and human health risks posed by this taxon in the St. Lawrence - Great Lakes system.
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Affiliation(s)
- C Hudon
- Aquatic Ecosystems Protection Research Division, Environment Canada, 105 McGill Street, 7th Floor, Montreal, QC, Canada H2Y 2E7.
| | - P Gagnon
- Aquatic Ecosystems Protection Research Division, Environment Canada, 105 McGill Street, 7th Floor, Montreal, QC, Canada H2Y 2E7
| | - S Poirier Larabie
- Aquatic Ecosystems Protection Research Division, Environment Canada, 105 McGill Street, 7th Floor, Montreal, QC, Canada H2Y 2E7
| | - C Gagnon
- Aquatic Ecosystems Protection Research Division, Environment Canada, 105 McGill Street, 7th Floor, Montreal, QC, Canada H2Y 2E7
| | - A Lajeunesse
- Aquatic Ecosystems Protection Research Division, Environment Canada, 105 McGill Street, 7th Floor, Montreal, QC, Canada H2Y 2E7
| | - M Lachapelle
- Aquatic Ecosystems Protection Research Division, Environment Canada, 105 McGill Street, 7th Floor, Montreal, QC, Canada H2Y 2E7
| | - M A Quilliam
- Measurement Science and Standards, National Research Council of Canada, 1411 Oxford Street, Halifax, NS, Canada B3H 3Z1
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