Analysis of chlorophyll fluorescence decays of isolated thylakoids in various stages of greening

Title:

Analysis of chlorophyll fluorescence decays of isolated thylakoids in various stages of greening

Creator:

Kowalczyk, A., Waloszek, A., and Frąckowiak, D.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:de3c7194-9c5a-40e1-85b4-255131342ae6
uuid:de3c7194-9c5a-40e1-85b4-255131342ae6
issn:0300-3604
doi:10.1023/A:1006960201513

Subject:

chloroplast, Cucumis sativus, 3-(3,4-dichlorophenyl)-1,1-dimethyl urea, etiochloroplast, fractal model, and photooxidation

Type:

model:article and TEXT

Format:

bez média and svazek

Description:

The decay of chlorophyll (Chl) fluorescence of etiochloroplasts isolated in various stage of greening of cucumber cotyledons was analysed in order to get structural information on a photosynthetic apparatus. Two model decays, multiexponential and stretched exponential, were applied in the analysis. The quality of fit in these two models was different in various stages of chloroplast greening. The two-exponent model did not provide a good fit at early greening stages. To improve the fit it was necessary to introduce an additional third component which became very low at later stages. However, chloroplasts in the early stage of greening could also be described by a stretched exponential with parameters indicating rather planar (two-dimensional) arrangement of donor and acceptor molecules. The chloroplasts treated by DCMU and/or photooxidized by strong irradiance exhibit a similar character of fractal decay as untreated samples but in the multiexponential model the exact values of lifetimes and amplitudes of components vary. This suggests that the structure of investigated system does not dramatically change as a result of these two types of treatment. and A. Kowalczyk, A. Waloszek, D. Frąckowiak.

Language:

Multiple languages

Rights:

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

Coverage:

369-379

Source:

Photosynthetica | 1998 Volume:35 | Number:3

Harvested from:

CDK

Metadata only:

false