Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

Primary charge separation in Photosystem II.

J P Dekker1, R Van Grondelle

  • 1Faculty of Sciences, Division of Physics and Astronomy, Vrije Universiteit, De Boelelaan 1081, 1081 HV, Amsterdam, The Netherlands, dekker@nat.vu.nl.

Photosynthesis Research
|October 18, 2005
PubMed
Summary

This minireview proposes a novel multimer model for Photosystem II (PS II) primary reactions. It suggests excitation delocalization across chlorins, challenging the special pair concept in green plant photosynthesis.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

In vivo evolution of an emerging zoonotic bacterial pathogen in an immunocompromised human host.

Nature communications·2021
Same author

Excitation dynamics in Photosystem I trapped in TiO<sub>2</sub> mesopores.

Photosynthesis research·2020
Same author

Healthcare personnel intestinal colonization with multidrug-resistant organisms.

Clinical microbiology and infection : the official publication of the European Society of Clinical Microbiology and Infectious Diseases·2017
Same author

Horizontal Transfer of Carbapenemase-Encoding Plasmids and Comparison with Hospital Epidemiology Data.

Antimicrobial agents and chemotherapy·2016
Same author

Persistence of Pseudomonas aeruginosa in a pulmonary nodule with late relapse.

Transplant infectious disease : an official journal of the Transplantation Society·2014
Same author

Oxidation of cytochrome c 2 by photosynthetic reaction centers of Rhodospirillum rubrum and Rhodopseudomonas sphaeroides in vivo. Effect of viscosity on the rate of reaction.

Photosynthesis research·2014

Area of Science:

  • Photosynthesis research
  • Plant biochemistry
  • Spectroscopy

Background:

  • Photosystem II (PS II) is crucial for green plant photosynthesis.
  • Understanding the primary reactions within the PS II reaction center (RC) is key to elucidating energy transfer and charge separation mechanisms.

Purpose of the Study:

  • To discuss issues concerning the primary photosynthetic reactions in green plant Photosystem II.
  • To propose a new 'multimer' model for the PS II reaction center complex.
  • To explain the origin of specific absorption bands and energy transfer dynamics.

Main Methods:

  • Theoretical modeling of energy transfer and charge separation processes.
  • Analysis of spectroscopic data, including absorption bands at 683 and 679 nm.

Related Experiment Videos

  • Discussion of ultrafast energy transfer and charge separation dynamics.

    • Main Results:

    • A 'multimer' model is proposed, suggesting excitation delocalization over multiple chlorins, without a distinct 'special pair'.
    • Ultrafast energy transfer (<500 fs) within the multimer and slower transfer (20 ps) from peripheral chlorophylls are described.
    • Ultrafast charge separation (<500 fs) with low yield initiates from an 'accessory' chlorophyll, followed by cation transfer or charge separation from a 'special pair' chlorophyll (8 ps).
    • Radical pair relaxation occurs via protein conformational changes (50 ps).

    Conclusions:

    • The proposed multimer model offers a new perspective on PS II primary reactions, emphasizing excitation delocalization.
    • Charge separation is a complex process, not simply trap- or diffusion-limited.
    • Energy transfer to the PS II RC can be rate-limiting in larger complexes.