Interaction of anions and cations in regulating energy distribution between the two photosystems

Title:

Interaction of anions and cations in regulating energy distribution between the two photosystems

Creator:

Jajoo, Anjana and Bharti, Sudhakar

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:e5f6ba89-166e-4dc8-a7c7-578a4202acdb
uuid:e5f6ba89-166e-4dc8-a7c7-578a4202acdb
issn:0300-3604
doi:10.1023/A:1007159105734

Subject:

chlorophyll fluorescence induction, MgCl2, NaCl, Na2HPO4, Na2PO4, Na2SO4, spinach, Spinacia oleracea, state change, and thylakoids

Type:

model:article and TEXT

Format:

bez média and svazek

Description:

Cations such as Mg2+ regulate spillover of absorbed excitation energy mainly in favour of photosystem (PS) 2. Effect of low concentration (<10 mM) of the monovalent cation Na+ on chlorophyll (Chl) a fluorescence was completely overridden by divalent cation Mg2+ (5 mM). Based on Chl a fluorescence yield and 77 K emission measurements, we revealed the role and effectiveness of anions (Cl-, SO42-, PO43-) in lowering the Mg2+-induced PS2 fluorescence. The higher the valency of the anion, the lesser was the expression of Mg2+ effect. Anions may thus overcome Mg2+ effects up to certain extent in a valency dependent manner, thereby diverting more energy to PS1 even in the presence of MgCl2. They may do so by reversing Mg2+-induced changes. and Anjana Jajoo, Sudhakar Bharti.

Language:

Multiple languages

Rights:

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

Coverage:

529-535

Source:

Photosynthetica | 1999 Volume:37 | Number:4

Harvested from:

CDK

Metadata only:

false