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Das S, Gevaert F, Ouddane B, Duong G, Souissi S. Single toxicity of arsenic and combined trace metal exposure to a microalga of ecological and commercial interest: Diacronema lutheri. CHEMOSPHERE 2022; 291:132949. [PMID: 34798102 DOI: 10.1016/j.chemosphere.2021.132949] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/01/2021] [Revised: 11/14/2021] [Accepted: 11/15/2021] [Indexed: 06/13/2023]
Abstract
Eco-toxicological assays with species of economic interest such as Diacronema lutheri are essential for industries that produce aquaculture feed, natural food additives and also in drug developing industries. Our study involved the exposure of a single and combined toxicity of arsenic (As V) to D. lutheri for the entire algal growth phase and highlighted that a combined exposure of As V with other essential (Copper, Cu; Nickel, Ni) and non-essential (Cadmium, Cd; Lead, Pb) trace metals reduced significantly the cell number, chlorophyll a content, and also significantly increased the de-epoxidation ratio (DR) as a stress response when compared to the single toxicity of As V. Arsenic, as one of the ubiquitous trace metal and an active industrial effluent is reported to have an increased bio-concentration factor when in mixture with other trace metals in this study. In the combined exposure, the concentration of total As bio-accumulated by D. lutheri was higher than in the single exposure. Hence, polluted areas with the prevalence of multiple contaminants along with the highly toxic trace metals like As can impose a greater risk to the exposed organisms that may get further bio-magnified in the food chain. Our study highlights the consequences and the response of D. lutheri in terms of contamination from single and multiple trace metals in order to obtain a safer biomass production for the growing need of natural derivatives.
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Affiliation(s)
- Shagnika Das
- Univ. Lille, CNRS, Univ. Littoral Côte D'Opale, IRD, UMR 8187 - LOG - Laboratoire D'Océanologie et de Géosciences, Station Marine de Wimereux, F-59000, Lille, France; Univ. Lille, CNRS, UMR 8516 - LASIRE - Equipe Physico-chimie de L'Environnement, Bâtiment C8, F-59000, Lille, France
| | - François Gevaert
- Univ. Lille, CNRS, Univ. Littoral Côte D'Opale, IRD, UMR 8187 - LOG - Laboratoire D'Océanologie et de Géosciences, Station Marine de Wimereux, F-59000, Lille, France
| | - Baghdad Ouddane
- Univ. Lille, CNRS, UMR 8516 - LASIRE - Equipe Physico-chimie de L'Environnement, Bâtiment C8, F-59000, Lille, France
| | - Gwendoline Duong
- Univ. Lille, CNRS, Univ. Littoral Côte D'Opale, IRD, UMR 8187 - LOG - Laboratoire D'Océanologie et de Géosciences, Station Marine de Wimereux, F-59000, Lille, France
| | - Sami Souissi
- Univ. Lille, CNRS, Univ. Littoral Côte D'Opale, IRD, UMR 8187 - LOG - Laboratoire D'Océanologie et de Géosciences, Station Marine de Wimereux, F-59000, Lille, France.
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Toranzo R, Ferraro G, Beligni MV, Perez GL, Castiglioni D, Pasquevich D, Bagnato C. Natural and acquired mechanisms of tolerance to chromium in a Scenedesmus dimorphus strain. ALGAL RES 2020. [DOI: 10.1016/j.algal.2020.102100] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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Zsiros O, Nagy G, Patai R, Solymosi K, Gasser U, Polgár TF, Garab G, Kovács L, Hörcsik ZT. Similarities and Differences in the Effects of Toxic Concentrations of Cadmium and Chromium on the Structure and Functions of Thylakoid Membranes in Chlorella variabilis. FRONTIERS IN PLANT SCIENCE 2020; 11:1006. [PMID: 32733513 PMCID: PMC7358611 DOI: 10.3389/fpls.2020.01006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/23/2020] [Accepted: 06/19/2020] [Indexed: 05/26/2023]
Abstract
Trace metal contaminations in natural waters, wetlands, and wastewaters pose serious threats to aquatic ecosystems-mainly via targeting microalgae. In this work, we investigated the effects of toxic amounts of chromium and cadmium ions on the structure and function of the photosynthetic machinery of Chlorella variabilis cells. To halt the propagation of cells, we used high concentrations of Cd and Cr, 50-50 mg L-1, in the forms of CdCl2 x 2.5 H2O and K2Cr2O7, respectively. Both treatments led to similar, about 50% gradual diminishment of the chlorophyll contents of the cells in 48 h, which was, however, accompanied by a small (~10%) but statistically significant enrichment (Cd) and loss (Cr) of ß-carotene. Both Cd and Cr inhibited the activity of photosystem II (PSII)-but with more severe inhibitions with Cr. On the contrary, the PsbA (D1) protein of PSII and the PsbO protein of the oxygen-evolving complex were retained more in Cr-treated cells than in the presence of Cd. These data and the higher susceptibility of P700 redox transients in Cr-treated cells suggest that, unlike with Cd, PSII is not the main target in the photochemical apparatus. These differences at the level of photochemistry also brought about dissimilarities at higher levels of the structural complexity of the photosynthetic apparatus. Circular dichroism (CD) spectroscopy measurements revealed moderate perturbations in the macro-organization of the protein complexes-with more pronounced decline in Cd-treated cells than in the cells with Cr. Also, as reflected by transmission electron microscopy and small-angle neutron scattering, the thylakoid membranes suffered shrinking and were largely fragmented in Cd-treated cells, whereas no changes could be discerned with Cr. The preservation of integrity of membranes in Cr-treated cells was most probably aided by high proportion of the de-epoxidized xanthophylls, which were absent with Cd. It can thus be concluded that beside strong similarities of the toxic effects of Cr and Cd, the response of the photosynthetic machinery of C. variabilis to these two trace metal ions substantially differ from each other-strongly suggesting different inhibitory and protective mechanisms following the primary toxic events.
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Affiliation(s)
- Ottó Zsiros
- Institute of Plant Biology, Biological Research Centre, Szeged, Hungary
| | - Gergely Nagy
- Laboratory for Neutron Scattering and Imaging, Paul Scherrer Institute, Villigen PSI, Villigen, Switzerland
- Institute for Solid State Physics and Optics, Wigner Research Centre for Physics, Budapest, Hungary
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, TN, United States
| | - Roland Patai
- Institute of Biophysics, Biological Research Centre, Szeged, Hungary
| | - Katalin Solymosi
- Department of Plant Anatomy, ELTE Eötvös Loránd University, Budapest, Hungary
| | - Urs Gasser
- Laboratory for Neutron Scattering and Imaging, Paul Scherrer Institute, Villigen PSI, Villigen, Switzerland
| | - Tamás F. Polgár
- Institute of Biophysics, Biological Research Centre, Szeged, Hungary
| | - Győző Garab
- Institute of Plant Biology, Biological Research Centre, Szeged, Hungary
- Department of Physics, Faculty of Science, University of Ostrava, Ostrava, Czechia
| | - László Kovács
- Institute of Plant Biology, Biological Research Centre, Szeged, Hungary
| | - Zsolt Tibor Hörcsik
- Department of Biology Nyíregyháza, Institute of Environmental Sciences, University of Nyíregyháza, Nyíregyháza, Hungary
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Costa CHD, Perreault F, Oukarroum A, Melegari SP, Popovic R, Matias WG. Effect of chromium oxide (III) nanoparticles on the production of reactive oxygen species and photosystem II activity in the green alga Chlamydomonas reinhardtii. THE SCIENCE OF THE TOTAL ENVIRONMENT 2016; 565:951-960. [PMID: 26803219 DOI: 10.1016/j.scitotenv.2016.01.028] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/18/2015] [Revised: 01/04/2016] [Accepted: 01/06/2016] [Indexed: 06/05/2023]
Abstract
With the growth of nanotechnology and widespread use of nanomaterials, there is an increasing risk of environmental contamination by nanomaterials. However, the potential implications of such environmental contamination are hard to evaluate since the toxicity of nanomaterials if often not well characterized. The objective of this study was to evaluate the toxicity of a chromium-based nanoparticle, Cr2O3-NP, used in a wide diversity of industrial processes and commercial products, on the unicellular green alga Chlamydomonas reinhardtii. The deleterious impacts of Cr2O3-NP were characterized using cell density measurements, production of reactive oxygen species (ROS), esterase enzymes activity, and photosystem II electron transport as indicators of toxicity. Cr2O3-NP exposure inhibited culture growth and significantly lowered cellular Chlorophyll a content. From cell density measurements, EC50 values of 2.05±0.20 and 1.35±0.06gL(-1) Cr2O3-NP were obtained after 24 and 72h of exposure, respectively. In addition, ROS levels were increased to 160.24±2.47% and 59.91±0.15% of the control value after 24 and 72h of exposition to 10gL(-1) Cr2O3-NP. At 24h of exposure, the esterase activity increased to 160.24% of control value, revealing a modification of the short-term metabolic response of algae to Cr2O3-NP exposure. In conclusion, the metabolism of C. reinhardtii was the most sensitive to Cr2O3-NP after 24h of treatment.
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Affiliation(s)
- Cristina Henning da Costa
- Department of Sanitary and Environmental Engineering, Federal University of Santa Catarina, Campus Universitário, CEP: 88040-970, Florianópolis, SC, Brazil
| | - François Perreault
- School of Sustainable Engineering and the Built Environment, Arizona State University, Tempe, AZ 85287-3005, United States
| | - Abdallah Oukarroum
- Department of Chemistry, University of Quebec in Montréal, 2101, Jeanne Mance Street, Station Centre-Ville, Montréal, QC H2X 2J6, Canada
| | - Sílvia Pedroso Melegari
- Department of Sanitary and Environmental Engineering, Federal University of Santa Catarina, Campus Universitário, CEP: 88040-970, Florianópolis, SC, Brazil; Center of Marine Studies, Federal University of Parana, Beira-mar Avenue, 83255-976, Pontal do Parana, PR, Brazil
| | - Radovan Popovic
- Department of Chemistry, University of Quebec in Montréal, 2101, Jeanne Mance Street, Station Centre-Ville, Montréal, QC H2X 2J6, Canada
| | - William Gerson Matias
- Department of Sanitary and Environmental Engineering, Federal University of Santa Catarina, Campus Universitário, CEP: 88040-970, Florianópolis, SC, Brazil.
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Reale L, Ferranti F, Mantilacci S, Corboli M, Aversa S, Landucci F, Baldisserotto C, Ferroni L, Pancaldi S, Venanzoni R. Cyto-histological and morpho-physiological responses of common duckweed (Lemna minor L.) to chromium. CHEMOSPHERE 2016; 145:98-105. [PMID: 26688244 DOI: 10.1016/j.chemosphere.2015.11.047] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2015] [Revised: 11/06/2015] [Accepted: 11/16/2015] [Indexed: 06/05/2023]
Abstract
Along with cadmium, lead, mercury and other heavy metals, chromium is an important environmental pollutant, mainly concentrated in areas of intense anthropogenic pressure. The effect of potassium dichromate on Lemna minor populations was tested using the growth inhibition test. Cyto-histological and physiological analyses were also conducted to aid in understanding the strategies used by plants during exposure to chromium. Treatment with potassium dichromate caused a reduction in growth rate and frond size in all treated plants and especially at the highest concentrations. At these concentrations the photosynthetic pathway was also altered as shown by the decrease of maximum quantum yield of photosystem II and the chlorophyll b content and by the chloroplast ultrastructural modifications. Starch storage was also investigated by microscopic observations. It was the highest at the high concentrations of the pollutant. The data suggested a correlation between starch storage and reduced growth; there was greater inhibition of plant growth than inhibition of photosynthesis, resulting in a surplus of carbohydrates that may be stored as starch. The investigation helps to understand the mechanism related to heavy metal tolerance of Lemna minor and supplies information about the behavior of this species widely used as a biomarker.
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Affiliation(s)
- L Reale
- Department of Agricultural, Food and Environmental Sciences, University of Perugia, Borgo XX Giugno 74, 06121 Perugia, Italy.
| | - F Ferranti
- Department of Agricultural, Food and Environmental Sciences, University of Perugia, Borgo XX Giugno 74, 06121 Perugia, Italy.
| | - S Mantilacci
- Biotecnologie B.T. Srl, Frazione Pantalla di Todi, 06059 Perugia, Italy.
| | - M Corboli
- Biotecnologie B.T. Srl, Frazione Pantalla di Todi, 06059 Perugia, Italy.
| | - S Aversa
- Biotecnologie B.T. Srl, Frazione Pantalla di Todi, 06059 Perugia, Italy.
| | - F Landucci
- Department of Botany and Zoology, Masaryk University, Kotlářská 2, CVZ-61137 Brno, Czech Republic.
| | - C Baldisserotto
- Department of Life Sciences and Biotechnology, University of Ferrara, C.so Ercole I d'Este, 32, 44121 Ferrara, Italy.
| | - L Ferroni
- Department of Life Sciences and Biotechnology, University of Ferrara, C.so Ercole I d'Este, 32, 44121 Ferrara, Italy.
| | - S Pancaldi
- Department of Life Sciences and Biotechnology, University of Ferrara, C.so Ercole I d'Este, 32, 44121 Ferrara, Italy.
| | - R Venanzoni
- Department of Agricultural, Food and Environmental Sciences, University of Perugia, Borgo XX Giugno 74, 06121 Perugia, Italy.
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Sighicelli M, Guarneri M. Assessing the poplar photochemical response to high zinc concentrations by image processing and statistical approach. PHOTOSYNTHESIS RESEARCH 2014; 122:315-22. [PMID: 25086626 DOI: 10.1007/s11120-014-0028-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/16/2013] [Accepted: 07/16/2014] [Indexed: 05/12/2023]
Abstract
Exposure of plants to high-heavy metals concentration inhibits multiple metabolic processes in plants and leads to an oxidative stress commonly referred as heavy metal ion toxicity. Chlorophyll a fluorescence has enhanced understanding of heavy metal ion action on the photosynthetic system. A rapid and non-invasive technique involving imaging of chlorophyll fluorescence is a useful tool for early detection of plant responses to heavy metal ion toxicity. In this work chlorophyll fluorescence emission and photochemical parameters in plants of Populus x euramericana clone I-214 were investigated by the portable Imaging PAM fluorometer at different days after soil treatment with zinc. Custom software for analysis of the photochemical parameters images has been developed in order to gain a better assessing of the plant performance in response of metal stress. The imaging analysis allowed visualizing heterogeneity in plant response to high zinc concentrations. The heterogeneity of images suggests spatial differences in photochemical activity and changes in the antenna down-regulation.
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Affiliation(s)
- Maria Sighicelli
- Technical Unit Sustainable Development and Agro-Industrial Innovation of Italian National Agency for New Technologies, Energy and Sustainable Economic Development (ENEA), 00123, Casaccia, Rome, Italy,
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Didur O, Dewez D, Popovic R. Alteration of chromium effect on photosystem II activity in Chlamydomonas reinhardtii cultures under different synchronized state of the cell cycle. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2013; 20:1870-1875. [PMID: 23238598 DOI: 10.1007/s11356-012-1389-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2012] [Accepted: 11/30/2012] [Indexed: 06/01/2023]
Abstract
The inhibitory effect of chromium (Cr) on photosystem II (PSII) activity was investigated in the green alga Chlamydomonas reinhardtii during different phases of the cell cycle. Algae were cultivated in continuous light or a light/dark cycle (16:8 h) to obtain a synchronously dividing cell culture. The cell division phases were determined with the DNA-specific fluorescent probe SYBR green using flow cytometry. The effect of Cr on PSII activity was investigated after a 24-h treatment with algal cultures having different proportions of newly divided cells (G(0)/G(1)), dividing cells at the DNA replication phase (S), and dividing cells at the mitosis phase (G(2)/M). Using chlorophyll a fluorescence parameters based on PSII electron transport capacity in dark- (Φ(M)II) and light-adapted (Φ'(M)II) equilibrium state, we found that the effect of Cr differs depending on the stage of the cell cycle. When algal cultures had a high proportion of cells actively dividing (M phase), the toxic effect of Cr on PSII activity appeared to be much higher and PSII quantum yield was decreased by 80 % compared to algal cultures mainly in the G(0)/G(1) phase. Therefore, the inhibitory effect of Cr on photosynthesis appears to be different according to the cell cycle state of the algal population.
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Affiliation(s)
- Olivier Didur
- Department of Chemistry, University of Quebec in Montreal, C.P. 8888, Succ. Centre-Ville, Montreal, Quebec, H3C 3P8, Canada
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8
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Wang S, Chen F, Mu S, Zhang D, Pan X, Lee DJ. Simultaneous analysis of photosystem responses of Microcystis aeruginoga under chromium stress. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2013; 88:163-168. [PMID: 23228465 DOI: 10.1016/j.ecoenv.2012.11.009] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/19/2012] [Revised: 11/09/2012] [Accepted: 11/09/2012] [Indexed: 06/01/2023]
Abstract
Chromium (Cr) is a toxic metal that poses a great threat to aquatic ecosystems. Information is limited on coinstantaneous responses of photosystems I (PSI) and II (PSII) to Cr(VI) stress due to lack of instruments that can simultaneously measure PSI and PSII activities. In the present study, responses of quantum yields of energy conversion and electron transport rates of PSI and PSII in Microcystis aeruginosa cells to Cr(VI) stress were simultaneously analyzed by a DUAL-PAM-100 system. Quantum yield of cyclic electron flow (CEF) under Cr(VI) stress and its physiological role in alleviating toxicity of Cr(VI) were also analyzed. At 5 mg L(-1) Cr(VI), quantum yield and electron transport rate of PSII decreased significantly, and light-induced non-photochemical fluorescence quenching lost. Cr(VI) also inhibited efficiency of PSII to use energy under high light more than of PSI. PSII showed lower maximal electron transport rate and light adaptability than PSI. Electron transport rate of PSI was higher and decreased less than that of PSII, implying less sensitivity of PSI to high light and Cr(VI). Energy dissipation through non-light-induced non-photochemical fluorescence quenching increased with increasing Cr(VI) concentration. CEF was stimulated under Cr(VI) treatment and made a significant contribution to quantum yield and electron transport of PSI, which was essential for protection of PSI from stresses of Cr(VI) and high light.
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Affiliation(s)
- Shuzhi Wang
- State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China
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Peña-Vázquez E, Pérez-Conde C, Costas E, Moreno-Bondi MC. Development of a microalgal PAM test method for Cu(II) in waters: comparison of using spectrofluorometry. ECOTOXICOLOGY (LONDON, ENGLAND) 2010; 19:1059-1065. [PMID: 20354900 DOI: 10.1007/s10646-010-0487-y] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 03/14/2010] [Indexed: 05/29/2023]
Abstract
Test methods are needed to monitor Cu concentrations in reservoirs and water supplies. Dictyosphaerium chlorelloides (Chlorophyta) cells were immobilized in a silicate sol-gel and the toxic effects of Cu(II) were examined using different techniques: fluorescence measurements (using a spectrofluorometer with an optic fiber coupled to a flow cell or a 96-well-plate reader) or by Pulse Amplitude Modulation (PAM) parameters using a portable instrument and the pulse saturation method. Fm' and qN were the most sensitive indicator parameters when performing Cu analysis in water. D. chlorelloides PAM biosensor presented a detection limit of 0.6 mg l(-1) for Cu(II), within the limits to establish if Cu concentrations exceeded regulatory levels. Moreover, a 1.9 mg Cu l(-1) (30 microM) resistant strain of the D. chlorelloides microalgae was produced in order to obtain more selectivity on the metal determination.
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Affiliation(s)
- E Peña-Vázquez
- Department of Analytical Chemistry, Nutrition and Bromatology, Faculty of Chemistry, University of Santiago de Compostela, 15782 Santiago de Compostela, Spain
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Wang LJ, Loescher W, Duan W, Li WD, Yang SH, Li SH. Heat acclimation induced acquired heat tolerance and cross adaptation in different grape cultivars: relationships to photosynthetic energy partitioning. FUNCTIONAL PLANT BIOLOGY : FPB 2009; 36:516-526. [PMID: 32688666 DOI: 10.1071/fp09008] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/09/2009] [Accepted: 04/16/2009] [Indexed: 05/08/2023]
Abstract
Several mechanisms on acquired heat tolerance and cross adaptation have been proposed; however, relationships to photosynthetic energy partitioning remain unknown. The effects of heat pretreatment on cold and heat tolerance in grapevine leaves of two cultivars ('Jingxiu', cold sensitive; 'Beta', cold tolerant) were evident in changes in the antioxidant system, lipid peroxidation, net photosynthesis rate and also in chlorophyll fluorescence according : Y(II) + Y(NPQ) + Y(NO) = 1, where Y(II) is the effective PSII quantum yield; Y(NPQ) is regulated energy dissipation as a protective mechanism; and Y(NO) is non-regulated energy dissipation as a damaging mechanism. Heat pretreatment enhanced heat tolerance in the two cultivars, which was associated with less energy partitioned in non-regulated energy dissipation, less lipid peroxidation and higher antioxidant enzyme (catalase, ascorbate peroxidase and guaiacol peroxidase) activities compared with control plants under heat stress. Heat pretreatment also induced cold tolerance in 'Jingxiu' and 'Beta' leaves. This cross adaptation seemed to be attributable in part to less non-regulated energy dissipation in pretreated 'Jingxiu' and 'Beta' than the controls under cold stress. The evidence that lipid peroxidation was less and antioxidant enzyme activities were higher in pretreated plants under cold stress further corroborated the results from energy partitioning.
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Affiliation(s)
- Li-Jun Wang
- Institute of Botany, The Chinese Academy of Sciences, Beijing 100093, P. R. China
| | - Wayne Loescher
- College of Agriculture and Natural Resources, Michigan State University, East Lansing 48824, USA
| | - Wei Duan
- Institute of Botany, The Chinese Academy of Sciences, Beijing 100093, P. R. China
| | - Wei-Dong Li
- School of Chinese Pharmacy, Beijing University of Chinese Medicine, Beijing 100029, P. R. China
| | - Shu-Hua Yang
- Institute of Botany, The Chinese Academy of Sciences, Beijing 100093, P. R. China
| | - Shao-Hua Li
- Wuhan Botanical Garden, The Chinese Academy of Sciences, Wuhan 430074, P. R. China
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Perreault F, Ait Ali N, Saison C, Popovic R, Juneau P. Dichromate effect on energy dissipation of photosystem II and photosystem I in Chlamydomonas reinhardtii. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2009; 96:24-9. [PMID: 19427227 DOI: 10.1016/j.jphotobiol.2009.03.011] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2009] [Revised: 03/24/2009] [Accepted: 03/30/2009] [Indexed: 11/27/2022]
Abstract
In this study, we investigated the energy dissipation processes via photosystem II and photosystem I activity in green alga Chlamydomonas reinhardtii exposed to dichromate inhibitory effect. Quantum yield of photosystem II and also photosystem I were highly decreased by dichromate effect. Such inhibition by dichromate induced strong quenching effect on rapid OJIP fluorescence transients, indicating deterioration of photosystem II electron transport via plastoquinone pool toward photosystem I. The decrease of energy dissipation dependent on electron transport of photosystem II and photosystem I by dichromate effect was associated with strong increase of non-photochemical energy dissipation processes. By showing strong effect of dichromate on acceptor side of photosystem I, we indicated that dichromate inhibitory effect was not associated only with PSII electron transport. Here, we found that energy dissipation via photosystem I was limited by its electron acceptor side. By the analysis of P700 oxido-reduction state with methylviolagen as an exogenous PSI electron transport mediator, we showed that PSI electron transport discrepancy induced by dichromate effect was also caused by inhibitory effect located beyond photosystem I. Therefore, these results demonstrated that dichromate has different sites of inhibition which are associated with photosystem II, photosystem I and electron transport sink beyond photosystems.
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Affiliation(s)
- François Perreault
- Department of Chemistry, University of Quebec in Montreal, C.P. 8888, Succ. Centre-Ville, Montreal, Quebec, Canada
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Pan X, Chen X, Zhang D, Wang J, Deng C, Mu G, Zhu H. EFFECT OF CHROMIUM(VI) ON PHOTOSYSTEM II ACTIVITY AND HETEROGENEITY OF SYNECHOCYSTIS SP. (CYANOPHYTA): STUDIED WITH IN VIVO CHLOROPHYLL FLUORESCENCE TESTS(1). JOURNAL OF PHYCOLOGY 2009; 45:386-394. [PMID: 27033817 DOI: 10.1111/j.1529-8817.2009.00647.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The inhibitory effect of Cr(VI) on the PSII of Synechocystis sp. was studied. Cr(VI) reduced O2 evolution and inhibited the water-splitting system in PSII. S-states test and flash induction test showed that Cr(VI) exposure increased the proportion of inactivated PSII (PSIIX ) and PSIIβ reaction centers, which increased the fluxes of dissipated energy. JIP test and QA (-) reoxidation test demonstrated that Cr(VI) treatment induces inhibition of electron transport from QA (-) to QB /QB (-) and accumulation of P680 (+) . More QA (-) had to be oxidized through S2 (QA QB )(-) charge recombination and oxidation by PQ9 molecules in PSII under Cr(VI) stress. These changes finally decreased the index of photosynthesis performance.
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Affiliation(s)
- Xiangliang Pan
- Key Laboratory of Oasis Ecology and Desert Environment, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, ChinaKey Laboratory of Oasis Ecology and Desert Environment, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China Key Laboratory of Oasis Ecology and Desert Environment, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, ChinaInstitute of Nuclear Energy Technology, Tsinghua University, Beijing, 100083, ChinaNortheast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun, 130012, ChinaKey Laboratory of Oasis Ecology and Desert Environment, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China
| | - Xi Chen
- Key Laboratory of Oasis Ecology and Desert Environment, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, ChinaKey Laboratory of Oasis Ecology and Desert Environment, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China Key Laboratory of Oasis Ecology and Desert Environment, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, ChinaInstitute of Nuclear Energy Technology, Tsinghua University, Beijing, 100083, ChinaNortheast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun, 130012, ChinaKey Laboratory of Oasis Ecology and Desert Environment, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China
| | - Daoyong Zhang
- Key Laboratory of Oasis Ecology and Desert Environment, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, ChinaKey Laboratory of Oasis Ecology and Desert Environment, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China Key Laboratory of Oasis Ecology and Desert Environment, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, ChinaInstitute of Nuclear Energy Technology, Tsinghua University, Beijing, 100083, ChinaNortheast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun, 130012, ChinaKey Laboratory of Oasis Ecology and Desert Environment, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China
| | - Jianlong Wang
- Key Laboratory of Oasis Ecology and Desert Environment, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, ChinaKey Laboratory of Oasis Ecology and Desert Environment, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China Key Laboratory of Oasis Ecology and Desert Environment, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, ChinaInstitute of Nuclear Energy Technology, Tsinghua University, Beijing, 100083, ChinaNortheast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun, 130012, ChinaKey Laboratory of Oasis Ecology and Desert Environment, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China
| | - Chunnuan Deng
- Key Laboratory of Oasis Ecology and Desert Environment, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, ChinaKey Laboratory of Oasis Ecology and Desert Environment, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China Key Laboratory of Oasis Ecology and Desert Environment, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, ChinaInstitute of Nuclear Energy Technology, Tsinghua University, Beijing, 100083, ChinaNortheast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun, 130012, ChinaKey Laboratory of Oasis Ecology and Desert Environment, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China
| | - Guijin Mu
- Key Laboratory of Oasis Ecology and Desert Environment, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, ChinaKey Laboratory of Oasis Ecology and Desert Environment, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China Key Laboratory of Oasis Ecology and Desert Environment, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, ChinaInstitute of Nuclear Energy Technology, Tsinghua University, Beijing, 100083, ChinaNortheast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun, 130012, ChinaKey Laboratory of Oasis Ecology and Desert Environment, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China
| | - Huaisong Zhu
- Key Laboratory of Oasis Ecology and Desert Environment, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, ChinaKey Laboratory of Oasis Ecology and Desert Environment, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China Key Laboratory of Oasis Ecology and Desert Environment, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, ChinaInstitute of Nuclear Energy Technology, Tsinghua University, Beijing, 100083, ChinaNortheast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun, 130012, ChinaKey Laboratory of Oasis Ecology and Desert Environment, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China
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Viruvuru V, Fragata M. Photochemical cooperativity in photosystem II. Characterization of oxygen evolution discontinuities in the light-response curves. Phys Chem Chem Phys 2008; 10:6607-14. [PMID: 18989471 DOI: 10.1039/b809294j] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In two previous papers (Fragata et al., J. Phys. Chem. B, 2005, 109, 14707-14714; Fragata et al., J. Phys. Chem. B, 2007, 111, 3315-3320), it was shown that the variation of oxygen evolution with the light intensity (I) in photosystem II (PSII) in steady state conditions can be formulated according to the Langmuir adsorption isotherm for heterogeneous catalysis. This yielded the expression OEth = OEth(max) I/(L1/2 + I), where OEth is the theoretical oxygen evolution, OEth(max) the maximum oxygen evolution, and L1/2 the irradiance giving OEth(max)/2. In this approximation, the photons interaction with the chlorophylls in the PSII reaction center is assumed to be a heterogeneous reaction in which the light is represented as a stream of particles instead of an electromagnetic wave. That is, the chlorophyll molecules are the adsorption surfaces (or heterogeneous catalysts), and the incident (or exciting) photons are the substrate, or the reagent. Recently, the examination of new experimental data obtained with 2,6-dichloro-p-benzoquinone (DCBQ) and p-benzoquinone (pBQ) as exogenous electron acceptors, disclosed the presence of oxygen evolution discontinuities (or transitions) in the light-response curves. The new data were fitted with a mathematical summation of hyperbola of order n(i) > 1, OEth = Sigma(i) [OEth(max)]iIn(i)/[(L1/2)i(n(i)) + I(n(i))], where the n(i)'s are the number of sites used by the incident photons in their interaction with the photosynthetic pigments in each population i of PSII centers open for photochemistry. The mathematical simulations yielded only three distinct n(i)'s, that is, 1.8, 4.8, 8.5 and 1.8, 4.2, 8.4 for isolated PSII particles incubated with DCBQ and pBQ, respectively. Implicitly, this means the simultaneous excitation of each PSII reaction center with more than one photon, that is, the excitation of more than one pigment molecule. It is suggested that these transitions have their origin in the cooperative interaction of the photons and the chlorophylls, and most likely also the pheophytins. This indicates that the discontinuities (or transitions) observed in the light-response curves of oxygen evolution are consistent with the hypothesis of photochemical cooperativity in photosystem II.
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Affiliation(s)
- V Viruvuru
- Département de Chimie-Biologie, Université du Québec à Trois-Rivières, Trois-Rivières, Québec, Canada G9A 5H7.
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