All

What are you looking for?

All
Projects
Results
Organizations

Quick search

  • Projects supported by TA ČR
  • Excellent projects
  • Projects with the highest public support
  • Current projects

Smart search

  • That is how I find a specific +word
  • That is how I leave the -word out of the results
  • “That is how I can find the whole phrase”

Redox transients of P680 associated with the incremental chlorophyll-a fluorescence yield rises elicited by a series of saturating flashes in diuron-treated Photosystem II core complex of Thermosynechococcus vulcanus

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61988987%3A17310%2F19%3AA2001YBO" target="_blank" >RIV/61988987:17310/19:A2001YBO - isvavai.cz</a>

  • Result on the web

    <a href="https://onlinelibrary.wiley.com/doi/10.1111/ppl.12945" target="_blank" >https://onlinelibrary.wiley.com/doi/10.1111/ppl.12945</a>

  • DOI - Digital Object Identifier

    <a href="http://dx.doi.org/10.1111/ppl.12945" target="_blank" >10.1111/ppl.12945</a>

Alternative languages

  • Result language

    angličtina

  • Original language name

    Redox transients of P680 associated with the incremental chlorophyll-a fluorescence yield rises elicited by a series of saturating flashes in diuron-treated Photosystem II core complex of Thermosynechococcus vulcanus

  • Original language description

    Recent chlorophyll-a fluorescence yield measurements, using single-turnover saturating flashes (STSFs), have revealed the involvement of a rate-limiting step in the reactions following the charge separation induced by the first flash. As also shown here, in diuron-inhibited PSII core complexes isolated from Thermosynechococcus vulcanus the fluorescence maximum could only be reached by a train of STSFs. In order to elucidate the origin of the fluorescence yield increments in STSF series, we performed transient absorption measurements at 819nm, reflecting the photooxidation and re-reduction kinetics of the primary electron donor P680. Upon single flash excitation of the dark-adapted sample, the decay kinetics could be described with lifetimes of 17ns (approximate to 50%) and 167ns (approximate to 30%), and a longer-lived component (approximate to 20%). This kinetics are attributed to re-reduction of P680(center dot+) by the donor side of PSII. In contrast, upon second-flash (with t between 5s and 100ms) or repetitive excitation, the 819nm absorption changes decayed with lifetimes of about 2ns (approximate to 60%) and 10ns (approximate to 30%), attributed to recombination of the primary radical pair P680(center dot+)Pheo(center dot-), and a small longer-lived component (approximate to 10%). These data confirm that only the first STSF is capable of generating stable charge separation-leading to the reduction of Q(A); and thus, the fluorescence yield increments elicited by the consecutive flashes must have a different physical origin. Our double-flash experiments indicate that the rate-limiting steps, detected by chlorophyll-a fluorescence, are not correlated with the turnover of P680.

  • Czech name

  • Czech description

Classification

  • Type

    J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database

  • CEP classification

  • OECD FORD branch

    10610 - Biophysics

Result continuities

  • Project

  • Continuities

    I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Others

  • Publication year

    2019

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Data specific for result type

  • Name of the periodical

    Physiologia Plantarum

  • ISSN

    0031-9317

  • e-ISSN

    1399-3054

  • Volume of the periodical

    166

  • Issue of the periodical within the volume

    1

  • Country of publishing house

    US - UNITED STATES

  • Number of pages

    11

  • Pages from-to

    22-32

  • UT code for WoS article

    000466108300004

  • EID of the result in the Scopus database

    2-s2.0-85064712279