Microorganisms,
Journal Year:
2024,
Volume and Issue:
12(12), P. 2582 - 2582
Published: Dec. 13, 2024
The
phosphorus
(P)
availability
in
soils
is
influenced
by
microbes,
particularly
those
containing
the
gene
responsible
for
phosphate
solubilization.
present
study
investigated
community
structure,
diversity,
and
co-occurrence
networks
of
phoD-harboring
bacteria
karst
non-karst
citrus
orchard
across
a
planting
duration
gradient,
natural
forests,
abandoned
land,
as
well
soil
total
P
(TP)
available
(AP)
contents
enzyme
activities.
AP
were
lower
regions
than
regions,
while
organic
carbon
(C;
SOC),
exchangeable
calcium,
microbial
biomass
nitrogen
(N)
contents;
alkaline
phosphatase
(ALP)
β-Glucuronidase
activities;
pH
had
opposite
trends.
In
addition,
SOC
ALP
acid
(ACP)
activities
decreased
with
an
increase
years,
whereas
AP,
TP,
ACP
increased.
diversity
indices
network
complexity
higher
marked
differences
between
different
years
regions.
was
significantly
positively
correlated
rare
genera
Pelagicola,
Methylobacter,
Streptomyces,
Micromonospora
Roseivivax,
Collimonas,
Methylobacterium,
Ralstonia,
Phyllobacterium
Structural
Equation
Modeling
showed
that
cultivation
altered
pH,
SOC,
N,
and,
turn,
bacterial
structure
which
led
to
changes
activity
availability.
Thus,
bacteria,
highly
regulated
soils.
Ecotoxicology and Environmental Safety,
Journal Year:
2023,
Volume and Issue:
262, P. 115190 - 115190
Published: June 28, 2023
Heavy
metal
pollution
poses
a
serious
hazard
to
the
soil
bacterial
community.
The
purpose
of
this
study
is
understand
characteristics
heavy
in
lead-zinc
mines
karst
areas
and
response
Pb,
Zn,
Cd,
As-induced
composite
microorganisms.
This
paper
selected
samples
from
mining
area
Xiangrong
Mining
Co.,
Ltd.,
Puding
County,
Guizhou
Province,
China.
contaminated
by
multiple
metals
such
as
Cd
As.
average
levels
As
Pb-Zn
were
14.5,
7.8,
5.5
4.4
times
higher
than
background
area,
respectively.
Bacterial
community
structures
functions
analyzed
using
16
S
rRNA
high-throughput
sequencing
technology
PICRUSt
method.
A
total
19
phyla,
34
classes
76
orders
detected
tested
soil.
At
phylum
level,
Proteobacteria
are
dominant
flora
tailings
reservoir
mine,
respectively
GWK1
(49.64%),
GWK2
(81.89%),
GWK3
(95.16%);
for
surrounding
farmland
soil,
Proteobacteria,
Actinobacteriota,
Acidobacteriota,
Chloroflexi
Firmicutes
most
abundant
five
groups.
RDA
analyses
revealed
that
has
significant
impact
on
diversity
distance
increased,
comprehensive
potential
risk
value
decreased,
increased.
Additionally,
various
types
have
different
effects
communities,
content
will
also
change
structure.
positively
related
therefore,
highly
resistant
metals.
analysis
suggested
significantly
affect
metabolic
function
Microorganisms
might
generate
resistance
enable
themselves
survive
increasing
transport
ions
excreting
ions.
These
results
can
be
used
basis
microbial
remediation
metal-contaminated
areas.
BMC Microbiology,
Journal Year:
2024,
Volume and Issue:
24(1)
Published: Nov. 5, 2024
The
assembly
of
the
rhizosphere
community,
even
diazotroph
is
mainly
shaped
by
soil
environmental
factors
(including
climate
and
physiochemical
characteristics)
plant
selection.
To
better
understand
driving
forces
on
active
overall
nitrogen-fixing
bacterial
community
compositions,
we
characterized
communities
tobacco
collected
from
three
sampling
sites
with
a
large
geographic
scale
(>
600
km).
results
indicate
that
diversity
composition
are
obviously
differed
according
to
sites.
Still,
no
significant
difference
found
between
in
rootzone
samples.
Climate
variables
including
mean
annual
precipitation
(MAP)
temperature
(MAT),
characteristics
available
nitrogen
(AN),
potassium
(AK)
pH
main
affect
structures
Furthermore,
MAP
MAT,
AN
phosphorus
(AP),
total
(TN)
organic
carbon
(OC),
AK
electrical
conductivity
(EC)
showed
similar
effects,
but
independent
effect
bacteria
communities.
However,
alpha
indices
higher
than
samples,
differences
observed
among
different
Proteobacteria
predominant
phylum
all
samples
for
bacteria.
Escherichia-Shigella,
Achromobacter,
Streptomyces
Sphingomonas
dominant
genera,
Bradyrhizobium,
Skermanella
Extensimonas
genera
rhizosphere.
high
abundance
Escherichia-Shigella
low
Ralstonia
root-knot
nematode
infection
wilt
disease
endemic
risk.
These
contribute
more
assemblage,
contributes
community.
Our
study
provides
novel
knowledge
assemble
across
geographical
scale.
Geoderma,
Journal Year:
2023,
Volume and Issue:
437, P. 116600 - 116600
Published: July 9, 2023
Soil
nitrogen
(N)
is
a
renewable
resource
of
N
fixed
by
free-living
fixation
(FLNF)
diazotrophs.
Thus,
understanding
the
microbial
driving
mechanism
FLNF
activity
can
aid
in
optimization
input.
However,
role
co-symbiosis
between
diazotrophs
and
arbuscular
mycorrhizal
fungi
(AMF)
at
different
soil
depths
has
been
largely
overlooked,
particularly
karst
ecosystems.
we
investigated
properties
characteristics
diazotroph
AMF
across
depths,
from
topsoil
to
soil-rock
mixing
layer,
based
on
profile.
such
as
organic
matter
ammonium
decreased
with
increasing
depth,
whereas
pH
showed
opposite
trend.
Similarly,
abundance
diversity
were
higher
8–73%
0–20
cm
than
20–40
layer.
Despite
high
topsoil,
was
30%
layer
cm.
The
co-occurrence
network
analysis
revealed
strengthening
cooperative
relationship
taxa
via
an
increase
number
unique
taxa.
A
structural
equation
model
indicated
that
depth
improves
due
mutualistic
cooperations
taxa,
Bradyrhizobium
unclassified
Racocetra.
This
study
provides
novel
insights
into
interspecific
interactions
AMF,
rather
their
diversity,
which
found
be
most
important
factors
Consequently,
roles
biotic
influencing
mutually
beneficial
regulating
should
considered
during
vegetation
recovery
fragile
region.
