Exposed red leaves display adaptive adjustments in chlorophyll and photosystem ratios compatible with the shade imposed by anthocyanin accumulation

Title:

Exposed red leaves display adaptive adjustments in chlorophyll and photosystem ratios compatible with the shade imposed by anthocyanin accumulation

Creator:

Zeliou, K., Kyzeridou, A., and Petropoulou, Y.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:982f09cf-f824-42d9-b758-9efb66ce687d
uuid:982f09cf-f824-42d9-b758-9efb66ce687d
doi:10.32615/ps.2021.062

Subject:

fluorescence emission spectra, foliar anthocyanins, photosystem ratio, and shade-acclimation syndrome

Type:

model:article and TEXT

Format:

počítač and online zdroj

Description:

Foliar anthocyanins shape a peculiar shade in a red leaf's interior leading to uneven energy distribution between the two photosystems. Accordingly, a readjustment of PSII/PSI stoichiometry could restore excitation balance. To test this hypothesis, 77 K fluorescence emission spectra of thylakoids from green and red leaves of seven species with different pigment profiles were compared. The ratio of F686/F736 served as an indication of the PSII/PSI functional ratio. To avoid possible species-dependent differences in the measured parameters, plants showing intra-individual, intra-species, or intra-leaf variation in the expression of the anthocyanic character were used. Red leaves or red leaf areas displayed higher PSII/PSI ratio, irrespectively of species and anthocyanin accumulation pattern. PSII/PSI ratio declined in parallel with anthocyanin decrease. In five species, red leaves displayed also a lower Chl a/b ratio. We conclude that red leaves growing in full sunlight develop adaptive adjustments in their chlorophyll and photosystem ratios, compatible with the shade-acclimation syndrome.

Language:

Multiple languages

Rights:

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

Coverage:

70-78

Source:

Photosynthetica | 2022 Volume:60 | Number:Special issue

Harvested from:

CDK

Metadata only:

false