Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 1991 Feb;27(2):121-33.
doi: 10.1007/BF00033251.

Resolution of components of non-photochemical chlorophyll fluorescence quenching in barley leaves

R G Walters  1 , P Horton
Affiliations

Resolution of components of non-photochemical chlorophyll fluorescence quenching in barley leaves

R G Walters et al. Photosynth Res. 1991 Feb.

Abstract

Non-photochemical chlorophyll fluorescence quenching (qN) in barley leaves has been analysed by monitoring its relaxation in the dark, by applying saturating pulses of light. At least three kinetically distinct phases to qN recovery are observed, which have previously been identified (Quick and Stitt 1989) as being due to high-energy state quenching ('fast'), excitation energy redistribution due to a state transition ('medium') and photoinhibition ('slow'). However, measurements of chlorophyll fluorescence at 77 K from leaf extracts show that state transitions only occur in low light conditions, whereas the 'medium' component of qN is very large in high light. The source of that part of the 'medium' component not accounted for by a state transition is discussed.

PubMed Disclaimer

References

    1. Plant Physiol. 1990 Feb;92(2):293-301 - PubMed
    1. Biochemistry. 1989 Aug 22;28(17):6960-9 - PubMed
    1. Biochim Biophys Acta. 1981 Mar 12;635(1):53-62 - PubMed
    1. Photosynth Res. 1989 Nov;22(2):137-46 - PubMed
    1. J Biol Chem. 1990 Feb 5;265(4):1972-9 - PubMed