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Facey JA, King JJ, Apte SC, Mitrovic SM. Assessing the importance of cobalt as a micronutrient for freshwater cyanobacteria. JOURNAL OF PHYCOLOGY 2022; 58:71-79. [PMID: 34633686 DOI: 10.1111/jpy.13216] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2021] [Revised: 08/05/2021] [Accepted: 09/09/2021] [Indexed: 06/13/2023]
Abstract
Micronutrients play key roles in numerous metabolic processes in cyanobacteria. However, our understanding of whether the micronutrient cobalt influences the productivity of freshwater systems or the occurrence of cyanobacterial blooms is limited. This study aimed to quantify the concentration of Co necessary for optimal cyanobacterial growth by exposing Microcystis aeruginosa to a range of Co concentrations under culture conditions. Extended exposure to concentrations below ˜0.06 μg · L-1 resulted in notable inhibition of M. aeruginosa growth. A clear negative relationship was observed between Co concentration in solution and intracellular Fe quota of M. aeruginosa, possibly due to decreased transport of Fe at higher Co concentrations. Cyanocobalamin and any Co within the structure of cyanocobalamin appears to be non-bioavailable to M. aeruginosa, instead they likely rely on the synthesis of a structural variant - pseudocobalamin, which may have implications for the wider algal community as the variants of cobalamin are not necessarily functionally exchangeable. To evaluate the likelihood of Co limitation of cyanobacterial growth under field conditions, a survey of 10 freshwater reservoirs in South-Eastern Australia was conducted. Four of the ten sites had dissolved Co concentrations below the 0.06 μg · L-1 threshold value. All four of these sites rarely undergo cyanobacterial blooms, strengthening evidence of the potential for Co to limit growth, perhaps either alone or in combination with phosphorus.
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Affiliation(s)
- Jordan A Facey
- Freshwater and Estuarine Research Group, School of Life Sciences, University of Technology Sydney, Sydney, Australia
| | - Josh J King
- CSIRO Land and Water, Lucas Heights, Australia
| | | | - Simon M Mitrovic
- Freshwater and Estuarine Research Group, School of Life Sciences, University of Technology Sydney, Sydney, Australia
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2
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Enhancement of ammonium removal from landfill leachate using microalgae by an integrated strategy of nutrient balance and trophic mode conversion. ALGAL RES 2022. [DOI: 10.1016/j.algal.2021.102572] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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3
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Gou Y, Yang J, Fang F, Guo J, Ma H. Feasibility of using a novel algal-bacterial biofilm reactor for efficient domestic wastewater treatment. ENVIRONMENTAL TECHNOLOGY 2020; 41:400-410. [PMID: 29995593 DOI: 10.1080/09593330.2018.1499812] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2018] [Accepted: 07/06/2018] [Indexed: 06/08/2023]
Abstract
Current algal-bacterial consortia require high hydraulic retention times (HRTs, 2-10 days) to efficiently remove pollutants from domestic wastewaters. A novel algal-bacterial biofilm reactor was developed for a much lower HRT. The results showed that an HRT of 12 h ensured 90% removal of organic matter and ammonium, and phosphate removal was approximately 30%. Decreasing the HRT to 8 h significantly deteriorated the reactor's pollutant removal efficiencies and increasing the HRT to 24 h did not improve these efficiencies. Illumination, which was light source for algae, was provided by a LED light. Activity tests showed that organic matter and ammonium removal rates resulting from illumination were 70% and 50%, respectively, of the rates when dissolved oxygen concentration was maintained at 2 mg/L. Chemical oxygen demand (COD) removal rates resulted from illumination and aeration were 18.63 and 25.38 mg COD/L.h, respectively. The phosphate removal rate was 0.26 and 0.43 mg/L.h when illumination and aeration were applied, respectively. The ammonium removal rates were approximately 10,390 and 5000 mg [Formula: see text] when the reactor was aerated or illuminated, respectively. These two rates were significantly higher than reported nitrification rates. Moreover, the percentage of Oscillatoria sp. increased from below 10% to over 90% under the applied organic load and temperature, while the percentage of fast growing algae, Chlorella, chroococcus sp and Scenedesmus sp., decreased from over 90% to below 10%. These results showed that an algal-bacterial biofilm reactor with a low reactor footprint was developed.
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Affiliation(s)
- Yao Gou
- School of urban Construction and Environmental Engineering, Chongqing University, Chongqing, China
| | - Jixiang Yang
- Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing, China
| | - Fang Fang
- School of urban Construction and Environmental Engineering, Chongqing University, Chongqing, China
| | - Jinsong Guo
- Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing, China
| | - Hua Ma
- Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing, China
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Facey JA, Apte SC, Mitrovic SM. A Review of the Effect of Trace Metals on Freshwater Cyanobacterial Growth and Toxin Production. Toxins (Basel) 2019; 11:E643. [PMID: 31694295 PMCID: PMC6891437 DOI: 10.3390/toxins11110643] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2019] [Revised: 11/01/2019] [Accepted: 11/02/2019] [Indexed: 12/21/2022] Open
Abstract
Cyanobacterial blooms are becoming more common in freshwater systems, causing ecological degradation and human health risks through exposure to cyanotoxins. The role of phosphorus and nitrogen in cyanobacterial bloom formation is well documented and these are regularly the focus of management plans. There is also strong evidence that trace metals are required for a wide range of cellular processes, however their importance as a limiting factor of cyanobacterial growth in ecological systems is unclear. Furthermore, some studies have suggested a direct link between cyanotoxin production and some trace metals. This review synthesises current knowledge on the following: (1) the biochemical role of trace metals (particularly iron, cobalt, copper, manganese, molybdenum and zinc), (2) the growth limitation of cyanobacteria by trace metals, (3) the trace metal regulation of the phytoplankton community structure and (4) the role of trace metals in cyanotoxin production. Iron dominated the literature and regularly influenced bloom formation, with 15 of 18 studies indicating limitation or colimitation of cyanobacterial growth. A range of other trace metals were found to have a demonstrated capacity to limit cyanobacterial growth, and these metals require further study. The effect of trace metals on cyanotoxin production is equivocal and highly variable. Better understanding the role of trace metals in cyanobacterial growth and bloom formation is an essential component of freshwater management and a direction for future research.
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Affiliation(s)
- Jordan A. Facey
- Freshwater and Estuarine Research Group, School of Life Sciences, Faculty of Science, University of Technology Sydney, Ultimo 2007, Australia
| | | | - Simon M. Mitrovic
- Freshwater and Estuarine Research Group, School of Life Sciences, Faculty of Science, University of Technology Sydney, Ultimo 2007, Australia
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Radkova M, Stoyneva-Gärtner M, Dincheva I, Stoykova P, Uzunov B, Dimitrova P, Borisova C, Gärtner G. Chlorella vulgaris H1993 and Desmodesmus communis H522 for low-cost production of high-value microalgal products. BIOTECHNOL BIOTEC EQ 2019. [DOI: 10.1080/13102818.2018.1562381] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
Affiliation(s)
- Mariana Radkova
- Group of Functional Genetics, AgroBioInstitute, National Center for Agrarian Science, Sofia, Bulgaria
| | - Maya Stoyneva-Gärtner
- Faculty of Biology, Department of Botany, Sofia University “St Kliment Ohridski”, Sofia, Bulgaria
| | - Ivayla Dincheva
- Group of Functional Genetics, AgroBioInstitute, National Center for Agrarian Science, Sofia, Bulgaria
| | - Petya Stoykova
- Group of Functional Genetics, AgroBioInstitute, National Center for Agrarian Science, Sofia, Bulgaria
| | - Blagoy Uzunov
- Faculty of Biology, Department of Botany, Sofia University “St Kliment Ohridski”, Sofia, Bulgaria
| | - Petya Dimitrova
- Faculty of Biology, Department of Botany, Sofia University “St Kliment Ohridski”, Sofia, Bulgaria
| | - Cvetanka Borisova
- Faculty of Biology, Department of Botany, Sofia University “St Kliment Ohridski”, Sofia, Bulgaria
| | - Georg Gärtner
- Faculty of Biology, Institute of Botany, University of Innsbruck, Innsbruck, Austria
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Simultaneous treatment of domestic wastewater and bio-lipid synthesis using immobilized and suspended cultures of microalgae and activated sludge. J IND ENG CHEM 2019. [DOI: 10.1016/j.jiec.2018.09.031] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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7
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Cuellar-Bermudez SP, Aleman-Nava GS, Chandra R, Garcia-Perez JS, Contreras-Angulo JR, Markou G, Muylaert K, Rittmann BE, Parra-Saldivar R. Nutrients utilization and contaminants removal. A review of two approaches of algae and cyanobacteria in wastewater. ALGAL RES 2017. [DOI: 10.1016/j.algal.2016.08.018] [Citation(s) in RCA: 161] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Häubner N, Sylvander P, Vuori K, Snoeijs P. Abiotic stress modifies the synthesis of alpha-tocopherol and beta-carotene in phytoplankton species. JOURNAL OF PHYCOLOGY 2014; 50:753-759. [PMID: 26988459 DOI: 10.1111/jpy.12198] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2012] [Accepted: 02/28/2014] [Indexed: 06/05/2023]
Abstract
We performed laboratory experiments to investi-gate whether the synthesis of the antioxidants α-tocopherol (vitamin E) and β-carotene in phytoplankton depends on changes in abiotic factors. Cultures of Nodularia spumigena, Phaeodactylum tricornutum, Skeletonema costatum, Dunaliella tertiolecta, Prorocentrum cordatum, and Rhodomonas salina were incubated at different tempe-ratures, photon flux densities and salinities for 48 h. We found that abiotic stress, within natural ecological ranges, affects the synthesis of the two antioxidants in different ways in different species. In most cases antioxidant production was stimulated by increased abiotic stress. In P. tricornutum KAC 37 and D. tertiolecta SCCAP K-0591, both good producers of this compound, α-tocopherol accumulation was negatively affected by environmentally induced higher photosystem II efficiency (Fv /Fm ). On the other hand, β-carotene accumulation was positively affected by higher Fv /Fm in N. spumigena KAC 7, P. tricornutum KAC 37, D. tertiolecta SCCAP K-0591 and R. salina SCCAP K-0294. These different patterns in the synthesis of the two compounds may be explained by their different locations and functions in the cell. While α-tocopherol is heavily involved in the protection of prevention of lipid peroxidation in membranes, β-carotene performs immediate photo-oxidative protection in the antennae complex of photosystem II. Overall, our results suggest a high variability in the antioxidant pool of natural aquatic ecosystems, which can be subject to short-term temperature, photon flux density and salinity fluctuations. The antioxidant levels in natural phytoplankton communities depend on species composition, the physiological condition of the species, and their respective strategies to deal with reactive oxygen species. Since α-tocopherol and β-carotene, as well as many other nonenzymatic antioxidants, are exclusively produced by photo-synthetic organisms, and are required by higher trophic levels through dietary intake, regime shifts in the phytoplankton as a result of large-scale environmental changes, such as climate change, may have serious consequences for aquatic food webs.
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Affiliation(s)
- Norbert Häubner
- Department of Ecology and Genetics, Uppsala University, Norbyvägen 18 D, Uppsala, SE-75236, Sweden
| | - Peter Sylvander
- Department of Ecology, Environment and Plant Sciences, Stockholm University, Stockholm, SE-10691, Sweden
| | - Kristiina Vuori
- Center of Excellence Evolutionary Genetics & Physiology, Department of Biology, Laboratory of Animal Physiology, University of Turku, Turku, FI-20014, Finland
| | - Pauline Snoeijs
- Department of Ecology, Environment and Plant Sciences, Stockholm University, Stockholm, SE-10691, Sweden
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Boelee NC, Janssen M, Temmink H, Shrestha R, Buisman CJN, Wijffels RH. Nutrient Removal and Biomass Production in an Outdoor Pilot-Scale Phototrophic Biofilm Reactor for Effluent Polishing. Appl Biochem Biotechnol 2013; 172:405-22. [DOI: 10.1007/s12010-013-0478-6] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2013] [Accepted: 08/23/2013] [Indexed: 11/30/2022]
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10
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Edmundson SJ, Wilkie AC. Landfill leachate--a water and nutrient resource for algae-based biofuels. ENVIRONMENTAL TECHNOLOGY 2013; 34:1849-1857. [PMID: 24350438 DOI: 10.1080/09593330.2013.826256] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
There is a pressing need for sustainable renewable fuels that do not negatively impact food and water resources. Algae have great potential for the production of renewable biofuels but require significant water and fertilizer resources for large-scale production. Municipal solid waste (MSW) landfill leachate (LL) was evaluated as a cultivation medium to reduce both water and elemental fertilizer demands of algae cultivation. Daily growth rate and cell yield of two isolated species of algae (Scenedesmus cf. rubescens and Chlorella cf. ellipsoidea) were cultivated in MSW LL and compared with Bold's Basal Medium (BBM). Results suggest that LL can be used as a nutrient resource and medium for the cultivation of algae biomass. S. cf. rubescens grew well in 100% LL, when pH was regulated, with a mean growth rate and cell yield 91.2% and 92.8% of those observed in BBM, respectively. S. cf. rubescens was more adaptable than C. cf. ellipsoidea to the LL tested. The LL used in this study supported a maximum volumetric productivity of 0.55 g/L/day of S. cf. rubescens biomass. The leachate had sufficient nitrogen to supply 17.8 g/L of algae biomass, but was limited by total phosphorus. Cultivation of algae on LL offsets both water and fertilizer consumption, reducing the environmental footprint and increasing the potential sustainability of algae-based biofuels.
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Affiliation(s)
- Scott J Edmundson
- Soil and Water Science Department, University of Florida-IFAS, Gainesville, FL 32611-0960, USA
| | - Ann C Wilkie
- Soil and Water Science Department, University of Florida-IFAS, Gainesville, FL 32611-0960, USA
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11
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Abdelaziz AEM, Leite GB, Hallenbeck PC. Addressing the challenges for sustainable production of algal biofuels: I. Algal strains and nutrient supply. ENVIRONMENTAL TECHNOLOGY 2013; 34:1783-805. [PMID: 24350435 DOI: 10.1080/09593330.2013.827748] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Microalgae hold promise for the production of sustainable replacement of fossil fuels due to their high growth rates, ability to grow on non-arable land and their high content, under the proper conditions, of high energy compounds that can be relatively easily chemically converted to fuels using existing technology. However, projected large-scale algal production raises a number of sustainability concerns concerning land use, net energy return, water use and nutrient supply. The state-of-the-art of algal production of biofuels is presented with emphasis on some possible avenues to provide answers to the sustainability questions that have been raised. Here, issues concerning algal strains and supply of nutrients for large-scale production are discussed. Since sustainability concerns necessitate the use of wastewaters for supply of bulk nutrients, emphasis is placed on the composition and suitability of different wastewater streams. At the same time, algal cultivation has proven useful in waste treatment processes, and thus this aspect is also treated in some detail.
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Affiliation(s)
- Ahmed E M Abdelaziz
- Département de microbiologie et immunologie, Université de Montréal, CP 6128, Centre-ville, Montréal, Canada PQ H3C 3J7
| | - Gustavo B Leite
- Département de microbiologie et immunologie, Université de Montréal, CP 6128, Centre-ville, Montréal, Canada PQ H3C 3J7
| | - Patrick C Hallenbeck
- Département de microbiologie et immunologie, Université de Montréal, CP 6128, Centre-ville, Montréal, Canada PQ H3C 3J7
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12
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Cohen MJ, Kurz MJ, Heffernan JB, Martin JB, Douglass RL, Foster CR, Thomas RG. Diel phosphorus variation and the stoichiometry of ecosystem metabolism in a large spring-fed river. ECOL MONOGR 2013. [DOI: 10.1890/12-1497.1] [Citation(s) in RCA: 70] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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13
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Bi R, Arndt C, Sommer U. STOICHIOMETRIC RESPONSES OF PHYTOPLANKTON SPECIES TO THE INTERACTIVE EFFECT OF NUTRIENT SUPPLY RATIOS AND GROWTH RATES(1). JOURNAL OF PHYCOLOGY 2012; 48:539-549. [PMID: 27011069 DOI: 10.1111/j.1529-8817.2012.01163.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Three species of phytoplankton, Rhodomonas sp., Phaeodactylum tricornutum Bohlin, and Isochrysis galbana Parke, were cultivated in semicontinuous culture to analyze the response of carbon (C):nitrogen (N):phosphorus (P) stoichiometry to the interactive effect of five N:P supply ratios and four growth rates (dilution rates). The relationship between cellular N and P quotas and growth rates fits well to both the Droop and Ågren's functions for all species. We observed excess uptake of both N and P in the three species. N:P biomass ratios showed a significant positive relationship with N:P supply ratios across the entire range of growth rates, and N:P biomass ratios converged to an intermediate value independent of N:P supply ratios at higher growth rates. The effect of growth rates on N:P biomass ratios was positive at lower N:P supply ratios, but negative at higher N:P supply ratios for both Rhodomonas sp. and I. galbana, while for P. tricornutum this effect was negative at all N:P supply ratios. A significant interactive effect of N:P supply ratios and growth rates on N:P biomass ratios was found in both Rhodomonas sp. and P. tricornutum, but not in I. galbana. Our results suggest that Ågren's functions may explain the underlying biochemical principle for the Droop model. The parameters in the Droop and Ågren's functions can be useful indications of algal succession in the phytoplankton community in changing oceans.
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Affiliation(s)
- Rong Bi
- Helmholtz Centre for Ocean Research Kiel (GEOMAR), Düsternbrooker Weg 20, 24105 Kiel, Germany
| | - Carmen Arndt
- Helmholtz Centre for Ocean Research Kiel (GEOMAR), Düsternbrooker Weg 20, 24105 Kiel, Germany
| | - Ulrich Sommer
- Helmholtz Centre for Ocean Research Kiel (GEOMAR), Düsternbrooker Weg 20, 24105 Kiel, Germany
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Scenario Analysis of Nutrient Removal from Municipal Wastewater by Microalgal Biofilms. WATER 2012. [DOI: 10.3390/w4020460] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Boelee NC, Temmink H, Janssen M, Buisman CJN, Wijffels RH. Nitrogen and phosphorus removal from municipal wastewater effluent using microalgal biofilms. WATER RESEARCH 2011; 45:5925-33. [PMID: 21940029 DOI: 10.1016/j.watres.2011.08.044] [Citation(s) in RCA: 147] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/22/2011] [Revised: 08/24/2011] [Accepted: 08/25/2011] [Indexed: 05/12/2023]
Abstract
Microalgal biofilms have so far received little attention as post-treatment for municipal wastewater treatment plants, with the result that the removal capacity of microalgal biofilms in post-treatment systems is unknown. This study investigates the capacity of microalgal biofilms as a post-treatment step for the effluent of municipal wastewater treatment plants. Microalgal biofilms were grown in flow cells with different nutrient loads under continuous lighting of 230 μmol/m(2)/s (PAR photons, 400-700 nm). It was found that the maximum uptake capacity of the microalgal biofilm was reached at loading rates of 1.0 g/m(2)/day nitrogen and 0.13 g/m(2)/day phosphorus. These maximum uptake capacities were the highest loads at which the target effluent values of 2.2 mg/L nitrogen and 0.15 mg/L phosphorus were still achieved. Microalgal biomass analysis revealed an increasing nitrogen and phosphorus content with increasing loading rates until the maximum uptake capacities. The internal nitrogen to phosphorus ratio decreased from 23:1 to 11:1 when increasing the loading rate. This combination of findings demonstrates that microalgal biofilms can be used for removing both nitrogen and phosphorus from municipal wastewater effluent.
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Affiliation(s)
- N C Boelee
- Wetsus, Centre of Excellence for Sustainable Water Technology, P.O. Box 1113, 8900 CC Leeuwarden, The Netherlands.
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Bouwman AF, Pawłowski M, Liu C, Beusen AHW, Shumway SE, Glibert PM, Overbeek CC. Global Hindcasts and Future Projections of Coastal Nitrogen and Phosphorus Loads Due to Shellfish and Seaweed Aquaculture. ACTA ACUST UNITED AC 2011. [DOI: 10.1080/10641262.2011.603849] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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17
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Wang X, Qin B, Gao G, Wang Y, Tang X, Otten T. Phytoplankton community from Lake Taihu, China, has dissimilar responses to inorganic and organic nutrients. J Environ Sci (China) 2010; 22:1491-1499. [PMID: 21235176 DOI: 10.1016/s1001-0742(09)60280-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
To evaluate the response of phytoplankton from Lake Taihu to different types of nutrients, the phytoplankton responses were measured after adding inorganic nitrogen (N) and phosphorus (P) or decomposed algal scum (Microcystis spp.) into the lake water. Both types of nutrients promoted an increase in phytoplankton biomass as determined by chlorophyll a and algal wet weight. The addition of decomposed algal scum resulted in a significantly greater phytoplankton response than the addition of inorganic N and P alone. The dissolved inorganic N and P in the inorganic nutrient treatment were found not limit phytoplankton growth. The higher algal biomass obtained in the treatment with decomposed algal scum indicated the importance of other organic nutrients besides N and P such as trace elements, as well as the importance of the form of N since the levels of ammonia nitrogen (NH4(+)-N) from the decomposed algal treatment were actually higher than that of the inorganic N and P addition. Microcystis spp. (Cyanobacteria), Scenedesmus spp. (Chlorophyta) and Synechocystis spp. (Cyanobacteria) were the dominant taxa in the control, inorganic N and P treatment, and the decomposed algal scum treatment, respectively. Microcystis never bloomed in response to both types of nutrient additions indicating that the bloom propagation is not solely related to nutrient additions, but may be related to the absence of selective grazing from zooplankton.
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Affiliation(s)
- Xiaodong Wang
- State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China.
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Singh SS, Tiwari SP, Abraham J, Rai S, Rai AK. Magnetobiological Effects on a Cyanobacterium, Anabaena Doliolum. ACTA ACUST UNITED AC 2009. [DOI: 10.3109/15368379409030720] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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19
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Leflaive J, Ten-Hage L. Allelopathic interactions in benthic biofilms: effects of abiotic conditions on production of and sensitivity to allelochemicals. ACTA ACUST UNITED AC 2009. [DOI: 10.1899/08-039.1] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Joséphine Leflaive
- Université de Toulouse, UPS, INP, EcoLab (Laboratoire d’Ecologie Fonctionnelle), 118 route de Narbonne, F-31062 Toulouse, France
| | - Loïc Ten-Hage
- Université de Toulouse, UPS, INP, EcoLab (Laboratoire d’Ecologie Fonctionnelle), 118 route de Narbonne, F-31062 Toulouse, France
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22
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Lavoie A, de la Noüe J. Harvesting ofScenedesmus obliquusin wastewaters: Auto- or bioflocculation? Biotechnol Bioeng 2004; 30:852-9. [DOI: 10.1002/bit.260300707] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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23
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Shimizu T, Inoue T, Shiraishi H. A senescence-associated S-like RNase in the multicellular green alga Volvox carteri. Gene 2001; 274:227-35. [PMID: 11675015 DOI: 10.1016/s0378-1119(01)00601-1] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Asexual individuals of the green alga Volvox carteri consist of only two cell types: somatic and reproductive cells. The somatic cells are terminally differentiated, post-mitotic cells which undergo gradual senescence leading to cell death in every generation. To elucidate the self-degrading process of macromolecules associated with senescence, we attempted to clone an RNase whose mRNA accumulation is increased during senescence. The corresponding cDNA clone VRN1, encoding an S-like RNase of V. carteri, is the first T(2)/S-like RNase to be cloned from green algae. Semi-quantitative RT-PCR analysis revealed that a relative amount of VRN1 mRNA is more than three-fold higher in the senescent somatic cells than in young somatic cells when the mRNA of ribosomal protein S18 is used as an internal standard. VRN1 mRNA is not induced by phosphate starvation, indicating that its accumulation during senescence is not due to a self-induced defect in utilizing phosphates. Similar regulation has been reported for RNS3, which encodes the S-like RNase that is induced in senescent leaves of Arabidopsis thaliana. These observations imply that VRN1 may promote RNA degradation during senescence of somatic cells in V. carteri, and that its regulation has similarity with that of certain senescence-associated RNases in higher plants.
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MESH Headings
- Amino Acid Sequence
- Arabidopsis Proteins
- Base Sequence
- Blotting, Western
- Chlorophyta/enzymology
- Chlorophyta/genetics
- Chlorophyta/growth & development
- Cloning, Molecular
- DNA, Complementary/chemistry
- DNA, Complementary/genetics
- Gene Expression Regulation, Developmental
- Gene Expression Regulation, Enzymologic
- Molecular Sequence Data
- Plant Proteins
- RNA/genetics
- RNA/metabolism
- RNA, Messenger/genetics
- RNA, Messenger/metabolism
- Reverse Transcriptase Polymerase Chain Reaction
- Ribonucleases/genetics
- Saccharomyces cerevisiae/genetics
- Sequence Alignment
- Sequence Analysis, DNA
- Sequence Homology, Amino Acid
- Time Factors
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Affiliation(s)
- T Shimizu
- Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan
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24
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Metabolic response of the halotolerant green algaDunaliella bardawil to nitrogen: Phosphorus ratios in batch culture. Folia Microbiol (Praha) 1997. [DOI: 10.1007/bf02816950] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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25
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Singh SP, Rai S, Rai AK, Tiwari SP, Singh SS, Abraham J. Athermal physiological effects of microwaves on a cynobacterium Nostoc muscorum: evidence for EM-memory bits in water. Med Biol Eng Comput 1994; 32:175-80. [PMID: 8022214 DOI: 10.1007/bf02518915] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Athermal physiological effects of continuous wave and modulated microwaves were studied on a cynobacterium Nostoc muscorum. The study shows that different microwave frequencies in continuous wave and modulated modes produced significantly different physiological effects on the algae. Water-mediated bioeffects further present additional proof that water has the capability to remember the imposed electromagnetic field characteristics for an extended period of time.
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Affiliation(s)
- S P Singh
- Department of Electronics Engineering, Banaras Hindu University, Varanasi, India
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26
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Bastien C, C??té R. Variations temporelles de l'ultrastructure deScenedesmus quadricauda exposée au cuivre lors d'une expérience à long terme. ACTA ACUST UNITED AC 1989. [DOI: 10.1002/iroh.19890740207] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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27
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Antonios M. A mathematical model of two-trophic-level aquatic systems with two complementary nutrients. Math Biosci 1987. [DOI: 10.1016/0025-5564(87)90094-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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28
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Sukenik A, Bennett J, Falkowski P. Light-saturated photosynthesis — Limitation by electron transport or carbon fixation? BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 1987. [DOI: 10.1016/0005-2728(87)90216-7] [Citation(s) in RCA: 125] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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29
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Casadevall E, Dif D, Largeau C, Gudin C, Chaumont D, Desanti O. Studies on batch and continuous cultures ofBotryococcus braunii: Hydrocarbon production in relation to physiological state, cell ultrastructure, and phosphate nutrition. Biotechnol Bioeng 1985; 27:286-95. [DOI: 10.1002/bit.260270312] [Citation(s) in RCA: 139] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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30
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Relationship between chlorophyll a content and protein content of invertebrate symbioses with algae or chloroplasts. ACTA ACUST UNITED AC 1985. [DOI: 10.1007/bf02002637] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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31
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Thomas W, Seibert D, Alden M, Neori A, Eldridge P. Yields, photosynthetic efficiencies and proximate composition of dense marine microalgal cultures. I. Introduction and Phaeodactylum tricornutum experiments. ACTA ACUST UNITED AC 1984. [DOI: 10.1016/0144-4565(84)90022-2] [Citation(s) in RCA: 31] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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32
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Cembella AD, Antia NJ, Harrison PJ. The utilization of inorganic and organic phosphorus compounds as nutrients by eukaryotic microalgae: a multidisciplinary perspective. Part 2. Crit Rev Microbiol 1984; 11:13-81. [PMID: 6373151 DOI: 10.3109/10408418409105902] [Citation(s) in RCA: 73] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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33
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Cembella AD, Antia NJ, Harrison PJ. The utilization of inorganic and organic phosphorous compounds as nutrients by eukaryotic microalgae: a multidisciplinary perspective: part 1. Crit Rev Microbiol 1982; 10:317-91. [PMID: 6321101 DOI: 10.3109/10408418209113567] [Citation(s) in RCA: 303] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
This comprehensive literature review of the phosphorus nutrition and metabolism of eukaryotic microalgae deals sequentially with (1) extracellular P-compounds available for algal utilization and growth; (2) orthophosphate uptake mechanisms, kinetics, and influence from environmental variables; (3) phosphatase-mediated utilization of organic phosphates involving multiple enzymes, induction and cellular location of repressible and irrepressible phosphatases, and their role in growth physiological processes; (4) intracellular phosphate metabolism covering diversity of phosphometabolites. ATP-linked energy regulation, polyphosphate pools and storage roles, phospholipids and phospholipases; (5) steady-state and transient-state models relating phosphate utilization to growth; (6) ecological aspects covering manifestations of phosphorus limitation, interspecific competition for phosphonutrients among microorganisms, and current views on phosphorus cycling and turnover in aquatic ecosystems. Although concentrating on the microalgae, the review often points out sounder conclusions drawn from bacteria and fungi, and includes specific macroalgae in considering certain subtopics where such algae were better investigated and provided a good basis for comparison with the microalgae.
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35
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Konopka A, Schnur M. Effect of light intensity on macromolecular synthesis in cyanobacteria. MICROBIAL ECOLOGY 1980; 6:291-301. [PMID: 24227225 DOI: 10.1007/bf02010492] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
The light-dependent incorporation of NaH(14)CO3 into low molecular weight compounds, polysaccharide, or protein was determined in cultures of the cyanobacteriumMerismopedia tenuissima incubated at a series of light intensities. There was an inverse relationship between incorporation into polysaccharide and protein. At light intensities of 90 μE/m(2)/sec or above, relative incorporation of radioisotope into polysaccharide was greatest and relative incorporation into protein was lowest. Optimal relative protein accumulation occurred in samples incubated at 20 μE/m(2)/sec. A broader optimum of light intensity for maximal protein accumulation was found if ammonia rather than nitrate was the nitrogen source. Physiological adaptation of cultures to growth at a particular light intensity did not alter the pattern of macromolecular incorporation when those cultures were tested over the series of light intensities. The response of cultures ofOscillatoria rubescens to light intensity was similar to that ofM. tenuissima, although incorporation into low molecular weight compounds was significantly greater.The effect of light intensity on macromolecular synthesis in a natural population ofOscillatoria rubescens was also determined. A pattern similar to that observed in batch cultures ofO. rubescens was occasionally found, but in other experiments there was no increase in relative protein incorporation when light intensity was decreased.
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Affiliation(s)
- A Konopka
- Department of Biological Sciences, Purdue University, 47907, W. Lafayette, Indiana
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39
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O'Brien TL. The symbiotic association between intracellular zoochlorellae (chlorophyceae) and the coelenterateAnthopleura xanthogrammica. ACTA ACUST UNITED AC 1980. [DOI: 10.1002/jez.1402110311] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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41
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Berman T, Skyring GW. Phosphorus cyeling in aquatic microorganisms studied by phased uptake of33P and32P. Curr Microbiol 1979. [DOI: 10.1007/bf02601734] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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43
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Chan HK, Campbell NE. Phytoplankton uptake and excretion of assimilated nitrate in a small Canadian shield lake. Appl Environ Microbiol 1978; 35:1052-60. [PMID: 677872 PMCID: PMC242984 DOI: 10.1128/aem.35.6.1052-1060.1978] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Nitrate uptake in the epilemnetic waters of a small eutrophic Canadian Shield lake was studied by using a 15N method during summer stratification. Concurrent with inhibition of primary production, 3-(3,4-dichlorophenyl)-1,1-dimethylurea inhibited NO3- assimilation. Nitrate up to 1 mg of N/liter did not affect the rate of primary production during 3 h of incubation. The NO3- fertilizer added to the lake weekly was consumed through algal assimilation in about 3 days. Excretion of the photoassimilated NO3- as dissolved organic nitrogen represented a significant portion of the nutrient incorporated by the cells. Only 40% of the NO3- -15N which disappeared could be accounted for in the particulate fraction. Although the rest was presumably excreted, only 15% of the 15N label was accounted for as cationic dissolved organic nitrogen by isotope assays. These excreted organic forms were predominantly serine and glycine in the dissolved free amino acid fraction. Bacteria as well as algae might be expected to contribute to and modify the extracellular nitrogen pool.
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45
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Schneider K, Frischknecht K. Orthophosphate influx and efflux rates of Chlorella fusca measured in a continuous turbidostat culture with 32P under various conditions. Arch Microbiol 1977; 115:339-46. [PMID: 603340 DOI: 10.1007/bf00446461] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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46
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Hipkin CR, Syrett PJ. Some effects of nitrogen-starvation on nitrogen and carbohydrate metabolism inAnkistrodesmus braunii. PLANTA 1977; 133:209-214. [PMID: 24425251 DOI: 10.1007/bf00380678] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/10/1976] [Accepted: 09/03/1976] [Indexed: 06/03/2023]
Abstract
Enzymic activities have been measured in cell-free extracts from nitrogen-starved cultures ofAnkistrodesmus braunii. During ten hours of nitrogenstarvation the activities of the enzymes nitrite reductase (E.C.1.6.6.4), glutamic dehydrogenase (E.C.1.4.1.4), glutamine synthetase (E.C.6.3.1.2) and urea amidolyase (E.C.3.5.1.5) were derepressed while the activities of the enzymes malate dehydrogenase (E.C.1.1.1.37) and hexokinase (E.C.2.7.1.1) remained more or less unchanged. In contrast, the photosynthetic capacity of the nitrogen-starved cultures declined rapidly and accompanying this decline were losses in the activities of ribulose diphosphate carboxylase (E.C.4.1.1.39) and triose phosphate-NADP-dehydrogenase (E.C.1.2.1.13).
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Affiliation(s)
- C R Hipkin
- Department of Botany and Microbiology, University College of Swansea, Singleton Park, SA2 8PP, Swansea, UK
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47
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Thomas RJ, Hipkin CR, Syrett PJ. The interaction of nitrogen assimilation with photosynthesis in nitrogen deficient cells of Chlorella. PLANTA 1976; 133:9-13. [PMID: 24425172 DOI: 10.1007/bf00385999] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/1976] [Accepted: 06/18/1976] [Indexed: 06/03/2023]
Abstract
Nitrogen-limited chemostat cultures of Chlorella fusca var. vacuolata, when given nitrogen in the inorganic forms of nitrate, nitrite and ammonium divert photo-generated electrons, from CO2 fixation to nitrogen assimilation. Addition of nitrate or nitrite, but not ammonium, stimulates rate of oxygen evolution. All but the most severely nitrogen-deficient culture have increased dark respiration rates after addition of inorganic nitrogen. The nitrite reduction step of nitrogen assimilation is the most light-dependent reaction.
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Affiliation(s)
- R J Thomas
- Department of Botany and Microbiology, University College of Swansea, Singleton Park, SA2 8PP, Swansea, U.K
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