Typical PSII to PSI ratio which allows fast growth rates

Range ~0.5 unitless
Organism Cyanobacteria Synechococcus PCC7002
Reference Bernstein et al., Effect of mono- and dichromatic light quality on growth rates and photosynthetic performance of Synechococcus sp. PCC 7002. Front Microbiol. 2014 Sep 195:488. doi: 10.3389/fmicb.2014.00488. p.2 left column 2nd paragraphPubMed ID25285095
Primary Source Zhao, J.D., Shen, G.Z., and Bryant, D.A. (2001). Photosystem stoichiometry and state transitions in a mutant of the cyanobacterium Synechococcus sp. PCC 7002 lacking phycocyanin. Biochim. Biophys. Acta 1505, 248–257.doi: 10.1016/S0005-2728(01)00175-XPubMed ID11334789
Comments "Under optimal conditions, Synechococcus 7002 displays growth rates which rank among the fastest reported for any cyanobacterium. While the underpinnings of a high growth rate are not fully understood, this phenotype may partly arise from a naturally high PSII to PSI ratio (typically ~0.5) (primary source), relatively high chlorophyll (Chl) content per cell, and low phycocyanin (PC) to allophycocyanin (APC) ratio (2:1) of the phycobilisome (BNID 111250)."
Entered by Uri M
ID 111246