2,
6-di-tert-butyl-p-cresol
(BHT)
is
a
synthetic
phenolic
antioxidant
and
pose
potential
threat
to
aquatic
organisms.
However,
as
the
emerging
contaminant,
little
known
about
response
of
microalgae
BHT.
In
this
study,
BHT
significantly
inhibited
growth
photosynthetic
pigment
content
Phaeodactylum
tricornutum
with
increase
concentration.
The
exposure
also
led
an
in
malondialdehyde
algal
cells,
indicating
oxidative
stress
caused
by
Simultaneously,
responded
environment
enhancing
activities
three
enzymes,
superoxide
dismutase,
catalase
peroxidase
eliminate
excess
reactive
oxygen
species
cells
during
various
time.
Furthermore,
transcriptome
analysis
revealed
that
up-regulation
genes
related
photosynthesis,
TCA
cycle,
phosphorylation
indole-3-acetic
acid
(IAA)
stress.
addition,
our
high-throughput
Illumina
MiSeq
sequencing
results
demonstrated
significant
relative
abundance
BHT-tolerant
bacteria
affiliated
Halomonas,
which
was
helpful
reduce
on
P.
tricornutum.
Microbiological
assays
further
Halomonas
can
thrive
using
IAA
sole
energy
source
exhibit
chemotactic
IAA.
Therefore,
we
conclude
phycosphere
promotes
colonization
or
recruitment
thereby
adaptability
environmental
pressures.
Overall,
study
provides
comprehensive
understanding
physiological
biochemical
effects
microalgae,
highlight
functional
significance
establishing
interaction
between
algae-associated
adverse
environments.
Water Biology and Security,
Journal Year:
2024,
Volume and Issue:
3(2), P. 100249 - 100249
Published: March 6, 2024
Environmental
factors
and
anthropogenic
activity
are
key
that
shape
the
distribution
of
bacteria
antibiotic
resistance
genes
(ARGs)
in
natural
environments.
However,
few
studies
have
focused
on
occurrence
ARGs
remote
pristine
In
this
study,
two
typical
rivers
western
Qinghai
Lake
basin
was
investigated.
Results
showed
cold-resistant
Planomicrobium
sp.
predominant
genus
due
to
low
temperature,
followed
by
unclassified_f_Planococcaceae.
High
nitrogen
nutrients
increased
abundance
diversity
community
denitrification
dominant
means
bacterial
nitrate
reduction.
Tetracycline
including
tetA,
tetB,
tetC
were
basin,
ranging
from
2.30
×
103
1.91
108
copies/L,
while
abundances
intI1,
such
as
sul1
indicated
basin.
Finally,
strong
positive
correlation
between
intI1
highlights
potential
transmission
risk
through
cross-
or
co-selection
horizontal
gene
transfer.
Our
study
emphasized
adaptation
environment
facilitation
propagation
Toxics,
Journal Year:
2024,
Volume and Issue:
12(3), P. 217 - 217
Published: March 14, 2024
Ampicillin
(AMP)
and
cefazolin
(CZO)
are
commonly
used
β-lactam
antibiotics
which
extensively
globally
produced.
Additionally,
AMP
CZO
known
to
have
relatively
high
ecotoxicity.
Notably,
the
mix
of
creates
a
synergistic
effect
that
is
more
harmful
environment,
how
exposure
AMP-CZO
can
induce
synergism
in
algae
remains
virtually
unknown.
To
yield
comprehensive
mechanistic
insights
into
chemical
toxicity,
including
dose–response
relationships
variations
species
sensitivity,
integration
multiple
endpoints
with
de
novo
transcriptomics
analyses
were
this
study.
We
employed
Selenastrum
capricornutum
investigate
its
toxicological
responses
at
various
biological
levels,
aim
elucidating
underlying
mechanisms.
Our
assessment
revealed
significant
growth
inhibition
response
relevant
concentrations.
This
was
associated
increased
levels
reactive
oxygen
(ROS)
perturbations
nitrogen
metabolism,
carbohydrate
energy
metabolism.
Growth
presence
combination
linked
reduced
viability
elevated
ROS
production,
decreased
total
soluble
protein
content,
inhibited
photosynthesis,
disruptions
key
signaling
pathways
related
starch
sucrose
ribosome
function,
amino
acid
biosynthesis,
production
secondary
metabolites.
It
concluded
from
physiological
level
Chlorophyll
(Chla)
Superoxide
dismutase
(SOD)
activity
strengthened
S.
group.
According
results
transcriptomic
analysis,
simultaneous
down-regulation
LHCA4,
LHCA1,
LHCA5,
sodA
destroyed
functions
photosynthetic
system
antioxidant
system,
respectively.
Such
information
invaluable
for
environmental
risk
assessments.
The
provided
critical
knowledge
better
understanding
potential
ecological
impacts
these
on
non-target
organisms.
Environmental Science & Technology,
Journal Year:
2024,
Volume and Issue:
58(43), P. 19397 - 19407
Published: Oct. 17, 2024
The
transmission
of
ARGs
in
the
microalgae-associated
epiphytic
bacteria
remains
unclear
under
antibiotic
exposure,
apart
from
altering
microbial
community
structure.
In
this
study,
ACS Nano,
Journal Year:
2024,
Volume and Issue:
18(43), P. 29820 - 29831
Published: Oct. 19, 2024
Little
information
is
known
about
the
long-term
effects
of
nanoplastics
(NPs)
in
aquatic
environments,
especially
under
environmental-related
scenarios.
Herein,
three
differently
charged
NPs
(nPS,
nPS-NH2,
and
nPS-COOH)
were
exposed
at
an
environmentally
realistic
concentration
(10
μg/L)
for
100
days
to
explore
variation
primary
productivity
(i.e.,
algae)
ecosystems.
Our
results
demonstrated
that
algae
adapted
all
types
by
enhancing
algal
number
(by
10.34-16.52%),
chlorophyll
a
11.28-17.65%),
carbon-fixing
enzyme
activity
49.19-68.33%),
which
further
confirmed
exposure
from
natural
water
culturing
experiments.
Based
on
chloroplast
biovolume
individual
level,
only
nPS
caused
differentiation
into
two
heterogeneous
subpopulations
(54.92
vs
45.08%),
while
nPS-NH2
nPS-COOH
did
not
cause
population.
Moreover,
molecular
adaptation
mechanisms
unraveled
integrating
epigenomics
transcriptomics.
Mean
methylation
rates
nPS,
significantly
elevated.
In
addition,
direction
gene
expression
regulation
via
differentially
methylated
regions
associated
with
genes
when
was
distinct
those
nPS-NH2.
highlight
importance
assessing
ecotoxicity
provide
useful
understanding
effect
