Photochemical and non-photochemical quenching coefficients of the chlorophyll fluorescence: comparison of variation and limits

Title:

Photochemical and non-photochemical quenching coefficients of the chlorophyll fluorescence: comparison of variation and limits

Creator:

Buschmann, C.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:396afd84-0dbe-49a1-89d6-8572390e3e2f
uuid:396afd84-0dbe-49a1-89d6-8572390e3e2f
issn:0300-3604
doi:10.1023/A:1007003921135

Subject:

pulse-amplitude-modulation

Type:

model:article and TEXT

Format:

bez média and svazek

Description:

There are several types of quenching coefficients currently in use which describe the decrease of the chlorophyll fluorescence: the photochemical quenching coefficients qP and q(P)rel and the non-photochemical quenching coefficients qN, q(N)rel, and NPQ. These five coefficients were calculated for a broad variety of cases of the fluorescence signals in a normal, realistic range and for determining the limits in a range with extremely low and high fluorescence values. The calculations showed that the quenching coefficients currently in use are not only numbers between 0 and 1 as one would expect when taking them as a relative measure of the quenching process. Most quenching coefficients must be regarded and interpreted carefully separated from each other. Each photochemical quenching coefficient and each non-photochemical quenching coefficient describe the same fluorescence signal in a different way. Only the relative quenching coefficients q(P)rel and q(N)rel match together and can be used to demonstrate a shift of the energy de-excitation from the photochemical to the non-photochemical route.

Language:

Multiple languages

Rights:

http://creativecommons.org/licenses/by-nc-sa/4.0/
policy:public

Coverage:

217-224

Source:

Photosynthetica | 1999 Volume:37 | Number:2

Harvested from:

CDK

Metadata only:

false