Comparison of the primary events of photoinhibition in Cyanobacteriay green algae and thylakoids of higher plants

Title:

Comparison of the primary events of photoinhibition in Cyanobacteriay green algae and thylakoids of higher plants

Creator:

Etienne, A.-L. and Kirilovsky, D.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:0f2b5b56-c9cb-4310-b6c9-fb7667accb35
uuid:0f2b5b56-c9cb-4310-b6c9-fb7667accb35
urnnbn:urn:nbn:cz:aba007-000fal

Type:

model:internalpart and TEXT

Description:

In whole cells of the wild type of Synechocystis 6714 exposed to high irradiance (Hl) the electron transfer to Qb was inhibited before the transfer to Qa In the mutant AzV with two point mutations in the Qg pocket (Ala 251 Val and Phe 211 Ser) the inhibition of electron transport to Qb had about the same rate as in the wild type but the transport to Qa was inhibited faster in the mutant. In the mutant also the repair of photosystem 2 (PS 2) reaction centres was slower after a moderate photoinhibitory damage. In contrast degradation of the Dl protein in the course of photoinhibition in vitro was slower with thylakoids from the mutant than with those of the wild type. In CMamydomonas cells photoinhibited at low temperature (5 °C) and in spinách thylakoids under anaerobic conditions a fast inhibition of electron transfer developed in PS 2 simultaneously with a State characteiized by a high level of F^. This high fluorescent statě disappeared and electron transport activity was restored in the dark without protein synďiesis when photoinhibited samples were soon transferred to higher temperature (25 °C) or to aerobic conditions, respectively. On the other hand, the irreversible photoinhibitory damage characteiized by the dechne of was slowed down by lowering of the temperature in all the objects tested.

Language:

Multiple languages

Rights:

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

Coverage:

81-87 and 99-105

Source:

Photosynthetica | 1992 Volume:27 | Number:1-2

Harvested from:

CDK

Metadata only:

false