Applied and Environmental Microbiology,
Journal Year:
2017,
Volume and Issue:
83(9)
Published: March 4, 2017
ABSTRACT
The
possibility
that
Methanothrix
(formerly
Methanosaeta
)
and
Geobacter
species
cooperate
via
direct
interspecies
electron
transfer
(DIET)
in
terrestrial
methanogenic
environments
was
investigated
rice
paddy
soils.
Genes
with
high
sequence
similarity
to
the
gene
for
PilA
pilin
monomer
of
electrically
conductive
pili
(e-pili)
sulfurreducens
accounted
over
half
sequences
metagenomic
libraries
42%
mRNA
transcripts
RNA
sequencing
(RNA-seq)
libraries.
This
abundance
e-pilin
genes
is
significant
because
e-pili
can
serve
as
conduits
DIET.
Most
were
affiliated
species,
but
most
closely
related
putative
from
genera
such
Desulfobacterium
,
Deferribacter
Geoalkalibacter
Desulfobacula
also
detected.
Approximately
17%
all
metatranscriptomic
bacterial
clustered
finding
spp.
actively
transcribing
growth-related
indicated
they
metabolically
active
coding
among
highly
transcribed
genes.
In
addition,
homologs
encoding
OmcS,
a
c
-type
cytochrome
associated
G.
required
DIET,
expressed
soils
enzymes
involved
reduction
carbon
dioxide
methane.
DIET
only
donor
known
support
CO
2
.
Thus,
these
results
are
consistent
model
which
providing
electrons
methane
production
through
electrical
connections
e-pili.
IMPORTANCE
some
important
microbial
contributors
global
production,
surprisingly
little
about
their
physiology
ecology.
source
it
demonstrates
contribution
makes
may
extend
beyond
conversion
acetate
Furthermore,
defined
coculture
studies
have
suggested
when
receive
energy
grow
faster
than
sole
source.
growth
metabolism
be
more
robust
generally
considered.
suggest
reason
repeatedly
found
microorganisms
syntrophically
cooperation
spp.,
possibly
other
methanogens,
Microbiology and Molecular Biology Reviews,
Journal Year:
2015,
Volume and Issue:
80(1), P. 91 - 138
Published: Dec. 24, 2015
Biotic
and
abiotic
surfaces
in
marine
waters
are
rapidly
colonized
by
microorganisms.
Surface
colonization
subsequent
biofilm
formation
development
provide
numerous
advantages
to
these
organisms
support
critical
ecological
biogeochemical
functions
the
changing
environment.
Microbial
surface
association
also
contributes
deleterious
effects
such
as
biofouling,
biocorrosion,
persistence
transmission
of
harmful
or
pathogenic
microorganisms
their
genetic
determinants.
The
processes
mechanisms
well
key
players
among
surface-associated
microbiota
have
been
studied
for
several
decades.
Accumulating
evidence
indicates
that
specific
cell-surface,
cell-cell,
interpopulation
interactions
shape
composition,
structure,
spatiotemporal
dynamics,
microbial
communities.
Several
mechanisms,
including
(i)
surface,
population,
community
sensing
signaling,
(ii)
intraspecies
interspecies
communication
interaction,
(iii)
regulatory
balance
between
cooperation
competition,
identified
lifestyle.
In
this
review,
recent
progress
study
is
synthesized
discussed.
Major
gaps
our
knowledge
remain.
We
pose
questions
targeted
investigation
surface-specific
community-level
features,
answers
which
would
advance
understanding
ecology
communities
at
levels
from
molecular
mechanistic
details
through
systems
biological
integration.
Annual Review of Microbiology,
Journal Year:
2017,
Volume and Issue:
71(1), P. 643 - 664
Published: July 12, 2017
Direct
interspecies
electron
transfer
(DIET)
has
biogeochemical
significance,
and
practical
applications
that
rely
on
DIET
or
DIET-based
aspects
of
microbial
physiology
are
growing.
Mechanisms
for
have
primarily
been
studied
in
defined
cocultures
which
Geobacter
species
one
the
partners.
Electrically
conductive
pili
(e-pili)
can
be
an
important
electrical
conduit
DIET.
However,
there
may
instances
contacts
made
between
transport
proteins
associated
with
outer
membranes
Alternatively,
partners
plug
into
carbon
materials,
such
as
granular
activated
carbon,
cloth,
biochar,
long-range
exchange
without
need
e-pili.
Magnetite
promotes
DIET,
possibly
by
acting
a
substitute
outer-surface
c-type
cytochromes.
is
primary
mode
some
anaerobic
digesters
converting
wastes
to
methane.
Promoting
materials
shows
promise
stabilizing
accelerating
methane
production
digesters,
permitting
higher
organic
loading
rates.
Various
lines
evidence
suggest
terrestrial
wetlands,
source
atmospheric
also
role
oxidation
coupled
sulfate
reduction,
control
releases.
The
finding
serve
electrons
photosynthesis
further
broadens
its
potential
environmental
significance.
Microorganisms
capable
good
catalysts
several
bioelectrochemical
technologies
e-pili
promising
renewable
electronic
materials.
study
early
stages,
additional
investigation
required
better
understand
diversity
microorganisms
importance
flow
environments,
biochemistry
Processes,
Journal Year:
2019,
Volume and Issue:
7(8), P. 504 - 504
Published: Aug. 2, 2019
The
anaerobic
digestion
technology
has
been
in
existence
for
centuries
and
its
underlying
theory
established
decades.
It
is
considered
a
useful
the
generation
of
renewable
energy,
provides
means
to
alleviate
problems
associated
with
low
access
energy.
However,
great
deal
current
research
targeted
towards
optimization
this
under
diverse
process
conditions.
This
review
presents
an
in-depth
analysis
chemistry
discusses
how
can
be
used
optimize
system
performance
through
identification
methods
that
accelerate
syntrophic
interactions
different
microorganisms
improved
methanogenic
reactions.
Recent
advances
addition
old
are
discussed
order
offer
general
but
comprehensive
synopsis
accumulated
knowledge
digestion,
as
well
overview
previous
future
directions
opportunities
AD
technology.
Achieving
sustainable
energy
requires
reforms
not
just
economic,
social
policy
aspects,
also
all
technical
which
represents
one
most
crucial
investments
systems.
AMB Express,
Journal Year:
2018,
Volume and Issue:
8(1)
Published: Jan. 4, 2018
Since
fossil
sources
for
fuel
and
platform
chemicals
will
become
limited
in
the
near
future,
it
is
important
to
develop
new
concepts
energy
supply
production
of
basic
reagents
chemical
industry.
One
alternative
crude
oil
natural
gas
could
be
biological
conversion
CO2
or
small
organic
molecules
methane
via
methanogenic
archaea.
This
process
has
been
known
from
biogas
plants,
but
recently,
insights
into
metabolism,
technical
optimizations
technology
combinations
were
gained,
which
would
allow
moving
beyond
mere
biomass.
In
steps
have
undertaken
increase
yield
purity
biogas,
such
as
addition
hydrogen
metal
granulate.
Furthermore,
integration
electrodes
led
development
microbial
electrosynthesis
(MES).
The
idea
behind
this
technique
use
electrical
power
generate
metabolism.
review
summarizes
biochemical
metabolic
background
methanogenesis
well
latest
applications
methanogens.
As
a
result,
shall
give
sufficient
overview
over
topic
both,
biologists
engineers
handling
bioelectrochemical
methanogenesis.
