Glycinebetaine stabilizes photosystem 1 and photosystem 2 electron transport in spinach thylakoid membranes against heat inactivation

Title:

Glycinebetaine stabilizes photosystem 1 and photosystem 2 electron transport in spinach thylakoid membranes against heat inactivation

Creator:

Allakhverdieva, Y. M., Mamedov, M. D., Ferimazova, N., Papageorgiou, G. C., and Gasanov, R. A.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:d8a47dc6-86dd-4f10-ba86-2e191bc6c951
uuid:d8a47dc6-86dd-4f10-ba86-2e191bc6c951
issn:0300-3604
doi:10.1023/A:1007159827344

Subject:

oxygen exchange, Spinacia oleracea, and temperature stress

Type:

model:article and TEXT

Format:

bez média and svazek

Description:

Glycinebetaine, a compatible osmolyte of halotolerant plants and bacteria, partially protected photosystem (PS) 1 and PS2 electron transport reactions against thermal inactivation but with different efficiencies. In its presence, the temperature for half-maximal inactivation (t1/2) was generally shifted downward by 3-12 °C. Glycinebetaine stabilized photoinduced oxygen evolving reactions of PS2 by protecting the tetranuclear Mn cluster and the extrinsic proteins of this complex. A weaker, although noticeable, stabilizing effect was observed in photoinduced PS2 electron transport reactions that did not originate in the oxygen-evolving complex (OEC). This weaker protection by glycinebetaine was probably exerted on the PS2 reaction centre. Glycinebetaine protected also photoinduced electron transport across PS1 against thermal inactivation. The protective effect was exerted on plastocyanin, the mobile protein in the lumen that carries electrons from the integral cytochrome b6f complex to the PS1 complex. and Y. M. Allakhverdieva ... [et al.].

Language:

Multiple languages

Rights:

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

Coverage:

423-432

Source:

Photosynthetica | 1999 Volume:37 | Number:3

Harvested from:

CDK

Metadata only:

false