PSII photochemistry responses to drought stress in autochthonous and modern sweet cherry cultivars

Title:

PSII photochemistry responses to drought stress in autochthonous and modern sweet cherry cultivars

Creator:

Mihaljević, I., Viljevac Vuletić, M., Tomaš, V., Horvat, D., Zdunić, Z., and Vuković, D.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:a886cc0a-9a88-461b-89a3-a08151e398c8
uuid:a886cc0a-9a88-461b-89a3-a08151e398c8
doi:10.32615/ps.2021.045

Subject:

chlorophyll a fluorescence, chlorophyll content, malondialdehyde, photosynthesis, sweet cherry, and water content

Type:

model:article and TEXT

Format:

počítač and online zdroj

Description:

In this study, the JIP test was used to assess the drought tolerance of two sweet cherry cultivars (Prunus avium L.) (modern and autochthonous). Plants were exposed to progressive drought by withholding water and their fast (< 1 s) chlorophyll fluorescence kinetics was evaluated. JIP test analysis showed that drought stress caused a greater decrease in performance indices (PIABS and PItotal) in a modern cultivar, as compared to an autochthonous one. Our results suggest that limited reoxidation of primary quinone electron acceptor (QA), higher amount of secondary quinone electron acceptor (QB-) nonreducing reaction centres, or inhibition of the electron transport between QA and QB, decreased more seriously the photosynthetic performance of the modern cultivar. Further, higher positive L- and K-bands observed for the modern cultivar also suggest lower energetic connectivity between PSII units and increased inhibition of oxygen-evolving complex over autochthonous cultivar. Our results suggest that the autochthonous cultivar Crveni hrušt had better photosynthetic performance under drought conditions, compared to the modern cultivar New Star.

Language:

Multiple languages

Rights:

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

Coverage:

517-528

Source:

Photosynthetica | 2021 Volume:59 | Number:4

Harvested from:

CDK

Metadata only:

false