Genomics of the Pleïotropic Glutathione System in Cyanobacteria - Advances in Botanical Research - page 161

Table 5.1 Genomic and metabolic characteristics of cyanobacteria used in this
chapter—cont'd

Species Isolation site Order N 2 H M Features Size %GC

Prochlorococcus
marinus MIT
9215

Equatorial
Pacific HL

P − − 1.73 31

Prochlorococcus
marinus MIT
9301

Mediterranean
sea (5 m)

P − − 1.64 31

Prochlorococcus
marinus MIT
9303

Mediterranean
sea

P − − 2.68 50

Prochlorococcus
marinus MIT
9312

Gulf Stream
surface
water

P − − HL adapted 1.71 31

Prochlorococcus
marinus MIT
9313

Gulf Stream
(135 m)

P − − LL adapted 2.41 51

Prochlorococcus
marinus MIT
9515

North Atlantic
Ocean
(10 m)

P − − LL adapted 1.95 31

Prochlorococ-
cus marinus
NATL1A

North Atlantic
Ocean
(10 m)

P − − LL adapted 1.86 35

Prochlorococ-
cus marinus
NATL2A

North Atlantic
Ocean
(10 m)

P − − LL adapted 1.84 35

Prochlorococ-
cus marinus
SS120°

Sargasso sea
(120 m)

P − − LL adapted 1.75 36

Prochlorococ-
cus marinus
MED4°

Open ocean P − − HL adapted 1.65 31

Order. C: Chroococcales; N: Nostococcales; O: Oscillatoriales; P: Prochlorales .
N 2 : N 2 fixation.
H 2 : Presence of an NiFe hydrogenase.
M: Able to grow in mixotrophic conditions.
Features. Ak: Akinete; Ho: Hormogony; Het: Heterocyst; Mot: Motility; LL: Low light; HL: High light.
CBC: Calvin Benson cycle; PSII: Photosystem II; PM: Plasma membrane.
S: Genome size.

Chromosomal copy numbers have been investigated in a few cyanobac-
teria. Marine strains appeared to be monoploid or diploid, in harbouring
respectively one or two copies of their chromosome per cell. By contrast,
nonmarine strains were found to be polyploid in propagating more than