Carotenoid cation formation and the regulation of photosynthetic light harvesting
Holt, N. E. ; Zigmantas, Donatas LU
; Valkunas, L.
; Li, X. P.
; Niyogi, K. K.
and Fleming, G. R.
(2005)
In Science
307(5708).
p.433-436
- Abstract
- Photosynthetic light harvesting in excess light is regulated by a process known as feedback deexcitation. Femtosecond transient absorption measurements on thylakoid membranes show selective formation of a carotenoid radical cation upon excitation of chlorophyll under conditions of maximum, steady-state feedback deexcitation. Studies on transgenic Arabidopsis thaliana plants confirmed that this carotenoid radical cation formation is correlated with feedback deexcitation and requires the presence of zeaxanthin, the specific carotenoid synthesized during high light exposure. These results indicate that energy transfer from chlorophyll molecules to a chlorophyll-zeaxanthin heterodimer, which then undergoes charge separation, is the mechanism... (More)
- Photosynthetic light harvesting in excess light is regulated by a process known as feedback deexcitation. Femtosecond transient absorption measurements on thylakoid membranes show selective formation of a carotenoid radical cation upon excitation of chlorophyll under conditions of maximum, steady-state feedback deexcitation. Studies on transgenic Arabidopsis thaliana plants confirmed that this carotenoid radical cation formation is correlated with feedback deexcitation and requires the presence of zeaxanthin, the specific carotenoid synthesized during high light exposure. These results indicate that energy transfer from chlorophyll molecules to a chlorophyll-zeaxanthin heterodimer, which then undergoes charge separation, is the mechanism for excess energy dissipation during feedback deexcitation. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/1432940
- author
- Holt, N. E.
; Zigmantas, Donatas
LU
; Valkunas, L.
; Li, X. P.
; Niyogi, K. K.
and Fleming, G. R.
- publishing date
- 2005
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- photoprotection, complexes, state, arabidopsis mutants, photosystem-ii, xanthophyll cycle, purple bacteria, psbs protein, plants, energy
- in
- Science
- volume
- 307
- issue
- 5708
- pages
- 433 - 436
- publisher
- American Association for the Advancement of Science (AAAS)
- external identifiers
-
- scopus:12344313072
- pmid:15662017
- ISSN
- 1095-9203
- DOI
- 10.1126/science.1105833
- language
- English
- LU publication?
- no
- additional info
- The information about affiliations in this record was updated in December 2015. The record was previously connected to the following departments: Chemical Physics (S) (011001060)
- id
- fa85962b-86e6-4e2f-9bfa-be0c1c96459b (old id 1432940)
- date added to LUP
- 2016-04-04 09:25:35
- date last changed
- 2022-04-08 02:53:26
@article{fa85962b-86e6-4e2f-9bfa-be0c1c96459b,
abstract = {{Photosynthetic light harvesting in excess light is regulated by a process known as feedback deexcitation. Femtosecond transient absorption measurements on thylakoid membranes show selective formation of a carotenoid radical cation upon excitation of chlorophyll under conditions of maximum, steady-state feedback deexcitation. Studies on transgenic Arabidopsis thaliana plants confirmed that this carotenoid radical cation formation is correlated with feedback deexcitation and requires the presence of zeaxanthin, the specific carotenoid synthesized during high light exposure. These results indicate that energy transfer from chlorophyll molecules to a chlorophyll-zeaxanthin heterodimer, which then undergoes charge separation, is the mechanism for excess energy dissipation during feedback deexcitation.}},
author = {{Holt, N. E. and Zigmantas, Donatas and Valkunas, L. and Li, X. P. and Niyogi, K. K. and Fleming, G. R.}},
issn = {{1095-9203}},
keywords = {{photoprotection; complexes; state; arabidopsis mutants; photosystem-ii; xanthophyll cycle; purple bacteria; psbs protein; plants; energy}},
language = {{eng}},
number = {{5708}},
pages = {{433--436}},
publisher = {{American Association for the Advancement of Science (AAAS)}},
series = {{Science}},
title = {{Carotenoid cation formation and the regulation of photosynthetic light harvesting}},
url = {{http://dx.doi.org/10.1126/science.1105833}},
doi = {{10.1126/science.1105833}},
volume = {{307}},
year = {{2005}},
}