Abstract

The non-saponifiable neutral lipid composition of nineteen bacterial strains isolated from Antarctic sea ice were analysed. Nine of these strains produced a novel highly unsaturated straight chain hydrocarbon as the major non-saponifiable neutral lipid component. The compound was identified as hentriacontanonene (n-C31.9) by mass spectrometry and the formation of n-C31:0 following hydrogenation. The occurrence of n-C31:9 also correlated with the production of polyunsaturated fatty acids (PUFA) by the bacterial strains. n-C31:9 may therefore represent a novel biomarker for the location of PUFA-producing bacteria from environmental samples.

REFERENCES

[1]
Cripps
G.C.
(
1990
)
Hydrocarbons in the seawater and pelagic organisms of the Southern Ocean
Polar Biol.
 ,
10
,
393
402
.
[2]
Venkatesan
M.I.
Kaplan
L.R.
(
1987
)
The lipid geochemistry of Antarctic marine sediment-Bransfield Strait
Mar. Chem.
 ,
21
,
347
375
.
[3]
Volkman
J.K.
Alien
D.E.
Stevenson
P.L.
Burton
H.R.
(
1986
)
Bacterial and algal hydrocarbons in sediment from a saline Antarctic lake, Ace Lake
Org. Geochem.
 ,
10
,
671
681
.
[4]
Nichols
P.D.
Palmisano
A.C.
Rayner
M.S.
Smith
G.A.
White
D.C.
(
1989
)
Changes in the lipid composition of Antarctic sea-ice diatom communities during a spring bloom-an indication of community physiological status
Antarct. Sci.
 ,
1
,
133
140
.
[5]
Nichols
P.D.
Volkman
J.K.
Palmisano
A.C.
Smith
G.A.
White
D.C.
(
1988
)
Occurrence of an isoprenoid C25 diunsaturated alkene and high neutral lipid content in Antarctic sea-ice diatom communities
J. Phycol.
 ,
24
,
90
96
.
[6]
Virtue
P.V.
Nichols
P.D.
Nicol
S.
(
1994
) In
Proc. 6th SCAR Biol. Symp
.
Dietary related mechanisms of survival in Euphausia superba: biochemical changes during long term starvation and bacteria as a possible source of nutrition
, (manuscript submitted).
[7]
Volkman
J.K.
Eglinton
G.
Corner
D.S.
Forsberg
T.E.V.
(
1980
)
Long-chain alkenes and alkenones in the marine coccolithophorid Emiliania huxleyi
Phytochem.
 ,
19
,
2619
2622
.
[8]
Cripps
G.C.
(
1992
)
The extent of hydrocarbon contamination in the marine environment from a research station the Antarctic
Mar. Poll. Bull
 ,
25
,
9
12
.
[9]
Goldfine
H.
(
1982
)
Lipids of prokaryotes: Structure and distribution
Curr. Topics Mem. Trans.
 ,
17
,
2
36
.
[10]
Harwood
J.L.
Russell
N.J.
(
1984
)
Lipids in Plants and Microbes
, pp.
162
George Alien & Unwin
,
London.
[11]
Finnert
W.R.
(
1988
)
Microbial Lipid Metabolism
In
Microbial Lipids
 
Ratledge
C.
Wilkinson
S.G.
, Eds) Vol.
2
, pp
525
566
Hardcourt Brace Jovanovich
,
London.
[12]
Zobel
C.E.
(
1946
)
Marine Microbiology
 
Waltham Publishing Co
,
Massachusetts.
[13]
Smibert
R.M.
Krieg
N.R.
(
1981
)
General Characteristics
In
Manual of Methods for General Bacteriology
 
Gerhardt
P.
Murray
R.G.E.
Costilow
R.N.
Nester
E.W.
Wood
W.A.
Krieg
N.R.
Briggs Phillips
G.
, Eds) pp
409
444
Am. Soc. Microbiol
,
Washington DC.
[14]
Bligh
E.G.
Dyer
W.J.
(
1959
)
A rapid method for total lipid extraction and purification
Can. J. Biochem. Physiol.
 ,
37
,
911
917
.
[15]
White
D.C.
Davis
W.M.
Nickels
J.S.
King
J.D.
Bobbie
R.J.
(
1979
)
Detection of the sedimentary microbial biomass by extractible lipid phosphate
Oecologica
 ,
40
,
51
62
.
[16]
Nichols
D.S.
McMeekin
T.A.
Nichols
P.D.
(
1994
)
Manipulation of polyunsaturated, branched-chain and transfatty acid production in Shewanella putrefaciens strain ACAM 342
Microbiology
 ,
140
,
577
584
.
[17]
Lee
R.F.
Nevenzel
J.C.
Paffenhöfer
G.-A.
Benson
A.A.
Patton
S.
Kavanagh
T.E.
(
1970
)
A unique hexaene hydrocarbon from a diatom (Skeletonema costatum)
Biochim. Biophys. Acta
 ,
202
,
386
388
.
[18]
Holzer
G.
Orö
J.
(
1979
)
Gas chromatographic-mass spectrometric analysis of neutral lipids from methanogenic and thermoacidophilic bacteria
J. Chromatog.
 ,
186
,
795
809
.
[19]
Lee
R.F.
Loeblich
A.R.
(
1971
)
Distribution of 21:6 hydrocarbon and 22:6 fatty acid in algae
Phytochem.
 ,
10
,
593
602
.
[20]
Volkman
J.K.
Johns
R.B.
Gillian
F.T.
Perry
G.J.
Bavor
H.J.
Jr.
(
1980
)
Microbial lipids of an intertidal sediment-I. Fatty acids and hydrocarbons
Geochim. Cosmochim. Acta
 ,
44
,
1133
1143
.
[21]
Nichols
D.S.
Nichols
P.D.
McMeekin
T.A.
(
1993
)
Polyunsaturated fatty acids from Antarctic bacteria
Antarct. Sci.
 ,
5
,
149
160
.