| Comments |
"The number of PSUs in AAP bacteria can be calculated
from the amount of BChl a per cell. BChl a content varies
from 0.4×10^-19mol/cell to nearly 8×10^-19mol/cell
among cultivated AAP bacteria, nearly the same range
observed for natural AAP bacterial communities (Table 3).
These pigment levels are > 10-fold lower than in anaerobic
anoxygenic phototrophic bacteria and in cyanobacteria
(Kolber et al., 2001 Koblížek et al., 2005 Yurkov, 2006).
The number of BChl molecules per PSU appears to be
rather similar among various AAP bacteria (about 34), with
most (28) associated with the light harvesting antenna
complex while the others (four Bchl a and two bacteriopheophytin
a) reside in the reaction centre (Yurkov and
Beatty, 1998 Koblížek et al., 2010). Assuming 34 BChl per
PSU, [researchers] estimate that the number of PSU per cell varies
from < 1000 to over 10 000 for cultivated AAP bacteria
(Table 3). The average of estimates for natural AAP bacterial
communities is about 1700 PSU per cell (Table 3)." See notes beneath table |