Environmental Science & Technology,
Год журнала:
2024,
Номер
unknown
Опубликована: Ноя. 25, 2024
Antibiotic
resistance
poses
a
significant
threat
to
human
health.
While
most
studies
focus
on
bacteria,
interactions
between
antibiotics
and
other
crucial
microbial
groups
like
protists
remain
uncertain.
This
study
investigates
how
interact
with
examines
these
impact
the
fate
of
genes.
It
reveals
that
amoebae
exhibit
high
eight
high-risk
environmental
antibiotics,
accumulating
quantities
within
their
cells.
Wild
amoeboid
strains
from
distant
locations
carry
substantial
antibiotic
genes
(ARGs)
metal
(MRGs),
heterogeneity
single
species.
Amoeboid
symbionts
pathogens
predominantly
Paraburkholderia
have
reduced
genomes
fewer
compared
free-living
strains,
while
amoeba-endogenous
Stenotrophomonas
maltophilia
does
not
significantly
genome
size.
suggests
hosts
serve
as
temporary
medium
facilitating
its
transmission.
In
summary,
unveils
soil
represent
unexpected
hotspots
for
Future
research
should
assess
effects
often-overlooked
explore
role
in
spreading
ARGs
MRGs
ecosystems.
Incorporating
into
broader
is
recommended,
highlighting
significance
One
Health
perspective.
Environmental Science & Technology,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 14, 2025
Plants
can
recruit
microorganisms
to
enhance
soil
arsenic
(As)
removal
and
nitrogen
(N)
turnover,
but
how
microbial
As
methylation
in
the
rhizosphere
is
affected
by
N
biotransformation
not
well
understood.
Here,
we
used
acetylene
reduction
assay,
arsM
gene
amplicon,
metagenome
sequencing
evaluate
influence
of
on
Vetiveria
zizanioides,
a
potential
hyperaccumulator.
V.
zizanioides
was
grown
mining
soils
(MS)
artificial
As-contaminated
(AS)
over
two
generations
controlled
pot
experiment.
Results
showed
that
content
dimethylarsinic
acid
significantly
positively
correlated
with
rate
fixation
activity
nitrite
reductase.
The
As-methylating
species
(e.g.,
Flavisolibacter
Paraflavitalea)
were
enriched
root-associated
compartments
second
generation
MS
AS.
Notably,
higher
abundance
genes
involved
(nifD,
nifK)
dissimilatory
nitrate
ammonium
(narG/H,
nirB/D/K/S)
detected
than
first
generation.
metabolic
pathway
analysis
further
demonstrated
fixing-stimulative
DNRA-stimulative
could
provide
synthesis
S-adenosyl-l-methionine,
serving
as
methyl
donors
for
methylation.
This
study
highlights
important
conversion-stimulative
pathways
has
implications
enhancing
phytoremediation
soils.
