Study of delayed fluorescence of chlorophyll d from photosytem II in Acaryochloris marina that uses chlorophyll d

Abstract

Acaryochloris marina (A. marina) is a cyanobacterium, which uses Chl d as a main pigment. Although Chl d absorbs light at 710 nm in contrast to Chl a that absorbs at 680 nm, A. marina can drive the same oxygen-evolving photosynthesis by the 10% lower quantum energy.
We assumed the redox potential of the components at the reducing and oxidizing sides of PS II by measuring the delayed fluorescence emitted by PS II Chl d. We also performed analysis by using PAM, and measured 77K low temperature fluorescence spectrum to study the energy transfer process.