The love-hate relationship between chlorophyll a and water in PSII affects fluorescence products

Title:

The love-hate relationship between chlorophyll a and water in PSII affects fluorescence products

Creator:

Guadagno, C. R., Beverly, D. P., and Ewers, B. E.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:30506892-ea44-40d5-87b5-d8be83f406c6
uuid:30506892-ea44-40d5-87b5-d8be83f406c6
issn:0300-3604
doi:10.32615/ps.2021.023

Subject:

úmrtnost, chlorofyl, fluorescence, mortality, chlorophyll, chlorophyll a fluorescence, drought, leaf water content, molecular wate, photosystem II, 2, and 581

Type:

model:article and TEXT

Format:

počítač and online zdroj

Description:

Chlorophyll a (Chl a) has an asymmetrical molecular organization, which dictates its orientation and the location of the pigment in the mature photosynthetic apparatus. Although Chl a fluorescence (ChlF) is widely accepted as a proxy for plant photosynthetic performance under countless stress conditions and across species, a mechanistic understanding of this causality is missing. Since water plays a much greater role than solvent for the photosynthetic machinery, elucidating its influence on Chl a may explain the reliable reflection of plant stress response in the ChlF signal. We examine the effect of hydration from well-watered to lethal drought on ChlF imagery results across morphologically diverse species to begin testing the impact of molecular scale hydration of Chl a on ChlF. Our results support a conceptual model where water is an integral part of the photosystems' structure and directly influences Chl a behavior leading to changes in the energy partitioning and ultimately in ChlF., C. R. Guadagno, D. P. Beverly, B. E. Ewers., and Obsahuje bibliografické odkazy

Language:

Multiple languages

Rights:

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

Coverage:

409-421

Source:

Photosynthetica | 2021 Volume:59 | Number:Special issue

Harvested from:

CDK

Metadata only:

false