10 me microcables

8/12/2019 10 ME Microcables

1/20

Pfeiffer et al. (2012) Nature doi:10.1038/nature11586

!"#$%&'($! #$ %&$' (&)( *+,)-./($0% 1)2(.3+) 2)/ (3)/%4$3( .,.2(3$/%$5.3 2./(+-.(.3 6+%()/2.%7

)$&*+,- +($/('$0! 8+23$.,.2(3$6.%9 8$,.20,)3 (.2&/+:0.%9 ;($-+2

;


2/20

Bacterial Nanowires

A+,,+ ,+D. %(302(03.% *$3 .,.2(3$/ (3)/%4$3(7

E)5. 1../ $1%.35.6 +/ -)/= -.(), 3.602+/B 1)2(.3+)7 F./.3),,= %=/(&.(+G.6 +/ 2$/6+(+$/% $* )22.4($3 ,+-+()(+$/7

@H)-4,.%! #$%&'()$* +,,-. /0$1'2$33' %2$45$2+4+ >),%$ +/

2=)/$1)2(.3+) )/6 *.3-./(+/B 1)2(.3+)?


3/20

Gorby et al., (2006) PNAS 103(30): 1135811363

Shewanella oneidensis under oxygen limitingconditions (electron acceptor)


4/20

Gorby et al., (2006) PNAS 103(30): 1135811363

Shewanella oneidensis

O2limitation No O2limitation


5/20

Gorby et al., (2006) PNAS 103(30): 1135811363

Shewanella oneidensis in the presenceof ferrihydrite (reduced to magnetite)


6/20

Gorby et al., (2006) PNAS 103(30): 1135811363

Synechocystis PCC 6803

Methanothermobacterthermoautotrophicus

Pelotomaculumthermopropionicum


7/20

7&+3'% 8+/%$ )'%/+-%+49 :78);


8/20


9/20



10/20

10

Study Area


Marine sediment in Aarhus bay (Denmark)

Laboratory experiments

Background: Incubated sediment samples in which no match was found

between electrochemical data and physicochemical gradients andzonation of

potential metabolisms.


11/20

H2S

Reduction of

oxygen at the

surface of the

sediment

Oxidation of H2S at

deep layers in a

completely anoxic

environment

Pic de pH(consum

Filaments density:

117 m cm3

Cell length: 3 m

Filament: 4x107

cel/cm3


12/20

8$,.20,)3 I6./(+*+2)(+$/ $* (&. $1%.35.6 *+,)-./(%

Deltaproteobacteria


13/20

O2

H2S

#&. %.6+-./( +% 20( +/($ ('$ 4+.2.%


14/20

O2

H2S

8+B3)(+$/ $* *+,)-./(% +/ (&. 5.3(+2), )H+% +% ,+-+(.6


15/20

Glass, non-conducting

microspheres

J&)( +* .,.2(3+2 2$/602(+5+(= +% 13$D./K


16/20


17/20

8+23$%2$4= $1%.35)(+$/% $* *+,)-./(%

=


18/20


19/20

L)2(.3+), 3'%/+2)1,.% $4./M04 /.' :0.%(+$/% ($ 1. )/%'.3.6!

E$' +% ./.3B= 2$/%.35.6 )/6 ),,$2)(.6 )-$/B 2.,,%K

J&)( +% (&.+3 6+5.3%+(= >B./.(+2 )/6 -.()1$,+2?K

J&)( +% (&. -$,.20,)3 1)%+% *$3 .,.2(3$/ (3)/%4$3(K

;3. (&.= '+6.%43.)6K


20/20


10 me microcables

Documents