Limiting steps and the contribution of alternative electron flow pathways in the recovery of the photosynthetic functions after freezing-induced desiccation of Haberlea rhodopensis

Title:

Limiting steps and the contribution of alternative electron flow pathways in the recovery of the photosynthetic functions after freezing-induced desiccation of Haberlea rhodopensis

Creator:

Georgieva, K., Popova, A. V. , Mihailova, G., Ivanov, A. G., and Velitchkova, M.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:b72b663c-ad23-427f-b46d-afacdbb613d9
uuid:b72b663c-ad23-427f-b46d-afacdbb613d9
doi:10.32615/ps.2022.008

Subject:

alternative electron flow, chlorophyll fluorescence, cyclic electron flows, freezing-induced desiccation, and rehydration

Type:

model:article and TEXT

Format:

počítač and online zdroj

Description:

Haberlea rhodopensis Friv. is unique with its ability to survive desiccation to an air-dry state during periods of extreme drought and freezing temperatures. To understand its survival strategies, it is important to examine the protective mechanisms not only during desiccation but also during rehydration. We investigated the involvement of alternative cyclic electron pathways during the recovery of photosynthetic functions after freezing-induced desiccation. Using electron transport inhibitors, the role of PGR5-dependent and NDH-dependent PSI-cyclic electron flows and plastid terminal oxidase were assessed during rehydration of desiccated leaves. Recovery of PSII and PSI, the capacity of PSI-driven cyclic electron flow, the redox state of plastoquinone pool, and the intersystem electron pool were analyzed. Data showed that the effect of alternative flows is more pronounced in the first hours of rehydration. In addition, the NDH-dependent cyclic pathway played a more determining role in the recovery of PSI than in the recovery of PSII.

Language:

Multiple languages

Rights:

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

Coverage:

136-146

Source:

Photosynthetica | 2022 Volume:60 | Number:Special issue

Harvested from:

CDK

Metadata only:

false