Publikation:

Kinetics and efficiency of excitation energy transfer from chlorophylls, their heavy metal substituted derivatives, and pheophytins to singlet oxygen

Lade...
Vorschaubild

Dateien

Zu diesem Dokument gibt es keine Dateien.

Datum

2002

Autor:innen

Dedic, Roman
Svoboda, Antonin
Hala, Jan

Herausgeber:innen

Kontakt

ISSN der Zeitschrift

Electronic ISSN

ISBN

Bibliografische Daten

Verlag

Schriftenreihe

Auflagebezeichnung

ArXiv-ID

Internationale Patentnummer

Angaben zur Forschungsförderung

Projekt

Open Access-Veröffentlichung
Core Facility der Universität Konstanz

Gesperrt bis

Titel in einer weiteren Sprache

Publikationstyp
Zeitschriftenartikel
Publikationsstatus
Published

Erschienen in

Biochimica et Biophysica Acta (BBA) - General Subjects. 2002, 1572(1), pp. 107-113. ISSN 0304-4165. Available under: doi: 10.1016/S0304-4165(02)00284-2

Zusammenfassung

Time-resolved measurements of the singlet oxygen infrared (1269 nm) luminescence were used to follow the kinetics and efficiency of excitation energy transfer (EET) between chlorophyll (Chl) derivatives and oxygen in acetone. The studied pigments were Mg-Chl a and b and their heavy metal (Cu2+ and Zn2+)-substituted analogues, as well as pheophytin (Pheo) a and b. The efficiency of EET from chlorophyll to oxygen was highly dependent on the central ion in the pigment. Cu-Chl a and Cu-Chl b had the lowest efficiencies of singlet oxygen production, while Pheo a had a higher one, and Zn-Chl a had a similar one compared to Mg-Chl a. Also the side chain (position C-7, i.e. Chl a vs. Chl b) influenced the efficiency of singlet oxygen formation. In the case of square-planar complexes like Cu-Chl and Pheo, EET was more efficient in the Chl a derivatives than in those of Chl b; the opposite effect was observed in the case of the five- or six-coordinated Mg-Chl and Zn-Chl. As for the lifetime of the Chl triplet state, the most striking difference to Mg-Chl again was found in the case of Cu-Chls,which had much shorter lifetimes. Furthermore, the central ion in Chl affected the physical quenching of singlet oxygen: its efficiency was decreasing from Mg-Chl through Zn-Chl over Cu-Chl to Pheo. The results are discussed in the context of the oxidative stress accompanying
heavy metal-induced stress in plants.

Zusammenfassung in einer weiteren Sprache

Fachgebiet (DDC)
570 Biowissenschaften, Biologie

Schlagwörter

Konferenz

Rezension
undefined / . - undefined, undefined

Forschungsvorhaben

Organisationseinheiten

Zeitschriftenheft

Zugehörige Datensätze in KOPS

Zitieren

ISO 690KÜPPER, Hendrik, Roman DEDIC, Antonin SVOBODA, Jan HALA, Peter M. H. KRONECK, 2002. Kinetics and efficiency of excitation energy transfer from chlorophylls, their heavy metal substituted derivatives, and pheophytins to singlet oxygen. In: Biochimica et Biophysica Acta (BBA) - General Subjects. 2002, 1572(1), pp. 107-113. ISSN 0304-4165. Available under: doi: 10.1016/S0304-4165(02)00284-2
BibTex
@article{Kupper2002Kinet-15529,
  year={2002},
  doi={10.1016/S0304-4165(02)00284-2},
  title={Kinetics and efficiency of excitation energy transfer from chlorophylls, their heavy metal substituted derivatives, and pheophytins to singlet oxygen},
  number={1},
  volume={1572},
  issn={0304-4165},
  journal={Biochimica et Biophysica Acta (BBA) - General Subjects},
  pages={107--113},
  author={Küpper, Hendrik and Dedic, Roman and Svoboda, Antonin and Hala, Jan and Kroneck, Peter M. H.}
}
RDF
<rdf:RDF
    xmlns:dcterms="http://purl.org/dc/terms/"
    xmlns:dc="http://purl.org/dc/elements/1.1/"
    xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
    xmlns:bibo="http://purl.org/ontology/bibo/"
    xmlns:dspace="http://digital-repositories.org/ontologies/dspace/0.1.0#"
    xmlns:foaf="http://xmlns.com/foaf/0.1/"
    xmlns:void="http://rdfs.org/ns/void#"
    xmlns:xsd="http://www.w3.org/2001/XMLSchema#" > 
  <rdf:Description rdf:about="https://kops.uni-konstanz.de/server/rdf/resource/123456789/15529">
    <dcterms:available rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2011-12-07T14:13:50Z</dcterms:available>
    <dc:rights>terms-of-use</dc:rights>
    <dcterms:abstract xml:lang="eng">Time-resolved measurements of the singlet oxygen infrared (1269 nm) luminescence were used to follow the kinetics and efficiency of excitation energy transfer (EET) between chlorophyll (Chl) derivatives and oxygen in acetone. The studied pigments were Mg-Chl a and b and their heavy metal (Cu2+ and Zn2+)-substituted analogues, as well as pheophytin (Pheo) a and b. The efficiency of EET from chlorophyll to oxygen was highly dependent on the central ion in the pigment. Cu-Chl a and Cu-Chl b had the lowest efficiencies of singlet oxygen production, while Pheo a had a higher one, and Zn-Chl a had a similar one compared to Mg-Chl a. Also the side chain (position C-7, i.e. Chl a vs. Chl b) influenced the efficiency of singlet oxygen formation. In the case of square-planar complexes like Cu-Chl and Pheo, EET was more efficient in the Chl a derivatives than in those of Chl b; the opposite effect was observed in the case of the five- or six-coordinated Mg-Chl and Zn-Chl. As for the lifetime of the Chl triplet state, the most striking difference to Mg-Chl again was found in the case of Cu-Chls,which had much shorter lifetimes. Furthermore, the central ion in Chl affected the physical quenching of singlet oxygen: its efficiency was decreasing from Mg-Chl through Zn-Chl over Cu-Chl to Pheo. The results are discussed in the context of the oxidative stress accompanying&lt;br /&gt;heavy metal-induced stress in plants.</dcterms:abstract>
    <void:sparqlEndpoint rdf:resource="http://localhost/fuseki/dspace/sparql"/>
    <dc:creator>Svoboda, Antonin</dc:creator>
    <dcterms:issued>2002</dcterms:issued>
    <dc:contributor>Dedic, Roman</dc:contributor>
    <dcterms:isPartOf rdf:resource="https://kops.uni-konstanz.de/server/rdf/resource/123456789/28"/>
    <dc:creator>Hala, Jan</dc:creator>
    <dc:contributor>Hala, Jan</dc:contributor>
    <dc:creator>Dedic, Roman</dc:creator>
    <dcterms:rights rdf:resource="https://rightsstatements.org/page/InC/1.0/"/>
    <dc:contributor>Kroneck, Peter M. H.</dc:contributor>
    <dcterms:title>Kinetics and efficiency of excitation energy transfer from chlorophylls, their heavy metal substituted derivatives, and pheophytins to singlet oxygen</dcterms:title>
    <foaf:homepage rdf:resource="http://localhost:8080/"/>
    <dc:contributor>Svoboda, Antonin</dc:contributor>
    <dc:language>eng</dc:language>
    <dc:creator>Kroneck, Peter M. H.</dc:creator>
    <dc:contributor>Küpper, Hendrik</dc:contributor>
    <bibo:uri rdf:resource="http://kops.uni-konstanz.de/handle/123456789/15529"/>
    <dc:date rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2011-12-07T14:13:50Z</dc:date>
    <dcterms:bibliographicCitation>Publ. in: Biochimica et Biophysica Acta : General Subjects ; 1572 (2002), 1. - S. 107-113</dcterms:bibliographicCitation>
    <dc:creator>Küpper, Hendrik</dc:creator>
    <dspace:isPartOfCollection rdf:resource="https://kops.uni-konstanz.de/server/rdf/resource/123456789/28"/>
  </rdf:Description>
</rdf:RDF>

Interner Vermerk

xmlui.Submission.submit.DescribeStep.inputForms.label.kops_note_fromSubmitter

Kontakt
URL der Originalveröffentl.

Prüfdatum der URL

Prüfungsdatum der Dissertation

Finanzierungsart

Kommentar zur Publikation

Allianzlizenz
Corresponding Authors der Uni Konstanz vorhanden
Internationale Co-Autor:innen
Universitätsbibliographie
Ja
Begutachtet
Diese Publikation teilen