reaction center is the sensitive target of the mercury(II) ion in intact cells of photosynthetic bacteria
The sensitivity of intact cells of purple photosynthetic bacterium Rhodobacter sphaeroides wild type to low level (
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| Veröffentlicht in: | Photosynthesis research 2012-06, Vol.112 (2), p.129-140 |
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| container_title | Photosynthesis research |
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| creator | Asztalos, Emese Sipka, Gábor Kis, Mariann Trotta, Massimo Maróti, Péter |
| description | The sensitivity of intact cells of purple photosynthetic bacterium Rhodobacter sphaeroides wild type to low level ( |
| doi_str_mv | 10.1007/s11120-012-9749-2 |
| format | Article |
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All assays related to the function of the reaction center (RC) protein (induction of the bacteriochlorophyll fluorescence, delayed fluorescence and light-induced oxidation and reduction of the bacteriochlorophyll dimer and energization of the photosynthetic membrane) showed prompt and later effects of the mercury ions. The damage expressed by decrease of the magnitude and changes of rates of the electron transfer kinetics followed complex (spatial and temporal) pattern according to the different Hg2+ sensitivities of the electron transport (donor/acceptor) sites including the reduced bound and free cytochrome c 2 and the primary reduced quinone. In contrast to the RC, the light harvesting system and the bc1 complex demonstrated much higher resistance against the mercury pollution. The 850 and 875 nm components of the peripheral and core complexes were particularly insensitive to the mercury(II) ions. The concentration of the photoactive RCs and the connectivity of the photosynthetic units decreased upon mercury treatment. The degree of inhibition of the photosynthetic apparatus was always higher when the cells were kept in the light than in the dark indicating the importance of metabolism in active transport of the mercury ions from outside to the intracytoplasmic membrane. Any of the tests applied in this study can be used for detection of changes in photosynthetic bacteria at the early stages of the action of toxicants.</description><identifier>ISSN: 0166-8595</identifier><identifier>EISSN: 1573-5079</identifier><identifier>DOI: 10.1007/s11120-012-9749-2</identifier><identifier>PMID: 22644477</identifier><language>eng</language><publisher>Dordrecht: Springer-Verlag</publisher><subject>absorption ; active transport ; Bacteria ; Biochemistry ; Biomedical and Life Sciences ; Chlorophyll ; cytochrome c ; electron transfer ; Electron transport ; Fluorescence ; ions ; Life Sciences ; mercury ; Mercury - metabolism ; metabolism ; oxidation ; Photosynthesis ; photosynthetic bacteria ; Photosynthetic Reaction Center Complex Proteins - metabolism ; Physiological aspects ; Phytochemistry ; Plant Genetics and Genomics ; Plant Physiology ; Plant Sciences ; pollution ; Regular Paper ; Rhodobacter sphaeroides ; Rhodobacter sphaeroides - metabolism ; Spectrometry, Fluorescence ; Spectrum analysis</subject><ispartof>Photosynthesis research, 2012-06, Vol.112 (2), p.129-140</ispartof><rights>Springer Science+Business Media B.V. 2012</rights><rights>COPYRIGHT 2012 Springer</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c577t-cf682bbf371c2c9ed2345a19631c813626d895410239586f6404fe26abe465343</citedby><cites>FETCH-LOGICAL-c577t-cf682bbf371c2c9ed2345a19631c813626d895410239586f6404fe26abe465343</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://link.springer.com/content/pdf/10.1007/s11120-012-9749-2$$EPDF$$P50$$Gspringer$$H</linktopdf><linktohtml>$$Uhttps://link.springer.com/10.1007/s11120-012-9749-2$$EHTML$$P50$$Gspringer$$H</linktohtml><link.rule.ids>314,776,780,27901,27902,41464,42533,51294</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/22644477$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Asztalos, Emese</creatorcontrib><creatorcontrib>Sipka, Gábor</creatorcontrib><creatorcontrib>Kis, Mariann</creatorcontrib><creatorcontrib>Trotta, Massimo</creatorcontrib><creatorcontrib>Maróti, Péter</creatorcontrib><title>reaction center is the sensitive target of the mercury(II) ion in intact cells of photosynthetic bacteria</title><title>Photosynthesis research</title><addtitle>Photosynth Res</addtitle><addtitle>Photosynth Res</addtitle><description>The sensitivity of intact cells of purple photosynthetic bacterium Rhodobacter sphaeroides wild type to low level (<100 μM) of mercury (Hg2+) contamination was evaluated by absorption and fluorescence spectroscopies of the bacteriochlorophyll–protein complexes. All assays related to the function of the reaction center (RC) protein (induction of the bacteriochlorophyll fluorescence, delayed fluorescence and light-induced oxidation and reduction of the bacteriochlorophyll dimer and energization of the photosynthetic membrane) showed prompt and later effects of the mercury ions. The damage expressed by decrease of the magnitude and changes of rates of the electron transfer kinetics followed complex (spatial and temporal) pattern according to the different Hg2+ sensitivities of the electron transport (donor/acceptor) sites including the reduced bound and free cytochrome c 2 and the primary reduced quinone. In contrast to the RC, the light harvesting system and the bc1 complex demonstrated much higher resistance against the mercury pollution. The 850 and 875 nm components of the peripheral and core complexes were particularly insensitive to the mercury(II) ions. The concentration of the photoactive RCs and the connectivity of the photosynthetic units decreased upon mercury treatment. The degree of inhibition of the photosynthetic apparatus was always higher when the cells were kept in the light than in the dark indicating the importance of metabolism in active transport of the mercury ions from outside to the intracytoplasmic membrane. Any of the tests applied in this study can be used for detection of changes in photosynthetic bacteria at the early stages of the action of toxicants.</description><subject>absorption</subject><subject>active transport</subject><subject>Bacteria</subject><subject>Biochemistry</subject><subject>Biomedical and Life Sciences</subject><subject>Chlorophyll</subject><subject>cytochrome c</subject><subject>electron transfer</subject><subject>Electron transport</subject><subject>Fluorescence</subject><subject>ions</subject><subject>Life Sciences</subject><subject>mercury</subject><subject>Mercury - metabolism</subject><subject>metabolism</subject><subject>oxidation</subject><subject>Photosynthesis</subject><subject>photosynthetic bacteria</subject><subject>Photosynthetic Reaction Center Complex Proteins - metabolism</subject><subject>Physiological aspects</subject><subject>Phytochemistry</subject><subject>Plant Genetics and Genomics</subject><subject>Plant Physiology</subject><subject>Plant Sciences</subject><subject>pollution</subject><subject>Regular Paper</subject><subject>Rhodobacter sphaeroides</subject><subject>Rhodobacter sphaeroides - metabolism</subject><subject>Spectrometry, Fluorescence</subject><subject>Spectrum analysis</subject><issn>0166-8595</issn><issn>1573-5079</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2012</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><sourceid>BENPR</sourceid><recordid>eNqNkkuLFDEUhYMoTjv6A9xogZtxUWPeSS2HwUfDgAuddUilb3oydFXaJCX0vzexRhFBkAQC937ncC8nCL0k-JJgrN5lQgjFPSa0HxQfevoIbYhQrBdYDY_RBhMpey0GcYae5XyPMdaSsKfojFLJOVdqg0IC60qIc-dgLpC6kLtyB12GOYcSvkNXbNpD6aL_WZ8guSWdLrbbt11ThXZLtaj6wyE37HgXS8ynueIluG6sTUjBPkdPvD1kePHwnqPbD--_Xn_qbz5_3F5f3fROKFV656Wm4-iZIo66AXaUcWHJIBlxmjBJ5U4PghNM2SC09JJj7oFKOwKXgnF2ji5W32OK3xbIxUwht-HsDHHJhmCmJRb8v1Ay4EFypiv65i_0Pi5pros0SkuqFVGVulypvT2ACbOPJVlXzw6m4OIMPtT6VdsCK05oFZBV4FLMOYE3xxQmm07V1bSMzZqxqRmblrFpmlcPoyzjBLvfil-hVoCuQK6teQ_pz1n_7fp6FXkbjd2nkM3tF4oJb7-GMSrZD8CRuB0</recordid><startdate>20120601</startdate><enddate>20120601</enddate><creator>Asztalos, Emese</creator><creator>Sipka, Gábor</creator><creator>Kis, Mariann</creator><creator>Trotta, Massimo</creator><creator>Maróti, Péter</creator><general>Springer-Verlag</general><general>Springer Netherlands</general><general>Springer</general><general>Springer Nature B.V</general><scope>FBQ</scope><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>3V.</scope><scope>7QP</scope><scope>7X7</scope><scope>7XB</scope><scope>88A</scope><scope>88E</scope><scope>88I</scope><scope>8AO</scope><scope>8FE</scope><scope>8FH</scope><scope>8FI</scope><scope>8FJ</scope><scope>8FK</scope><scope>ABUWG</scope><scope>AFKRA</scope><scope>AZQEC</scope><scope>BBNVY</scope><scope>BENPR</scope><scope>BHPHI</scope><scope>CCPQU</scope><scope>DWQXO</scope><scope>FYUFA</scope><scope>GHDGH</scope><scope>GNUQQ</scope><scope>HCIFZ</scope><scope>K9.</scope><scope>LK8</scope><scope>M0S</scope><scope>M1P</scope><scope>M2P</scope><scope>M7N</scope><scope>M7P</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PRINS</scope><scope>Q9U</scope><scope>7X8</scope><scope>7QL</scope><scope>7T7</scope><scope>7U7</scope><scope>8FD</scope><scope>C1K</scope><scope>FR3</scope><scope>P64</scope></search><sort><creationdate>20120601</creationdate><title>reaction center is the sensitive target of the mercury(II) ion in intact cells of photosynthetic bacteria</title><author>Asztalos, Emese ; Sipka, Gábor ; Kis, Mariann ; Trotta, Massimo ; Maróti, Péter</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c577t-cf682bbf371c2c9ed2345a19631c813626d895410239586f6404fe26abe465343</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2012</creationdate><topic>absorption</topic><topic>active transport</topic><topic>Bacteria</topic><topic>Biochemistry</topic><topic>Biomedical and Life Sciences</topic><topic>Chlorophyll</topic><topic>cytochrome c</topic><topic>electron transfer</topic><topic>Electron transport</topic><topic>Fluorescence</topic><topic>ions</topic><topic>Life Sciences</topic><topic>mercury</topic><topic>Mercury - 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All assays related to the function of the reaction center (RC) protein (induction of the bacteriochlorophyll fluorescence, delayed fluorescence and light-induced oxidation and reduction of the bacteriochlorophyll dimer and energization of the photosynthetic membrane) showed prompt and later effects of the mercury ions. The damage expressed by decrease of the magnitude and changes of rates of the electron transfer kinetics followed complex (spatial and temporal) pattern according to the different Hg2+ sensitivities of the electron transport (donor/acceptor) sites including the reduced bound and free cytochrome c 2 and the primary reduced quinone. In contrast to the RC, the light harvesting system and the bc1 complex demonstrated much higher resistance against the mercury pollution. The 850 and 875 nm components of the peripheral and core complexes were particularly insensitive to the mercury(II) ions. The concentration of the photoactive RCs and the connectivity of the photosynthetic units decreased upon mercury treatment. The degree of inhibition of the photosynthetic apparatus was always higher when the cells were kept in the light than in the dark indicating the importance of metabolism in active transport of the mercury ions from outside to the intracytoplasmic membrane. Any of the tests applied in this study can be used for detection of changes in photosynthetic bacteria at the early stages of the action of toxicants.</abstract><cop>Dordrecht</cop><pub>Springer-Verlag</pub><pmid>22644477</pmid><doi>10.1007/s11120-012-9749-2</doi><tpages>12</tpages><oa>free_for_read</oa></addata></record> |
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| ispartof | Photosynthesis research, 2012-06, Vol.112 (2), p.129-140 |
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| subjects | absorption active transport Bacteria Biochemistry Biomedical and Life Sciences Chlorophyll cytochrome c electron transfer Electron transport Fluorescence ions Life Sciences mercury Mercury - metabolism metabolism oxidation Photosynthesis photosynthetic bacteria Photosynthetic Reaction Center Complex Proteins - metabolism Physiological aspects Phytochemistry Plant Genetics and Genomics Plant Physiology Plant Sciences pollution Regular Paper Rhodobacter sphaeroides Rhodobacter sphaeroides - metabolism Spectrometry, Fluorescence Spectrum analysis |
| title | reaction center is the sensitive target of the mercury(II) ion in intact cells of photosynthetic bacteria |
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