Biology,
Год журнала:
2025,
Номер
14(1), С. 87 - 87
Опубликована: Янв. 17, 2025
Oxidative
stress,
a
critical
factor
affecting
the
health
and
productivity
of
aquatic
organisms,
arises
from
imbalance
between
reactive
oxygen
species
(ROS)
production
antioxidant
defenses.
In
aquaculture,
natural
antioxidants
have
gained
increasing
attention
as
sustainable
feed
additives
to
mitigate
oxidative
damage,
enhance
immune
responses,
improve
overall
growth
performance.
This
review
provides
comprehensive
synthesis
antioxidative
mechanisms
key
antioxidants,
including
carotenoids,
polysaccharides,
vitamins,
polyphenols,
flavonoids.
By
neutralizing
ROS
modulating
cellular
signaling
pathways
such
Nrf2/ARE,
these
compounds
offer
significant
protective
effects
against
damage
in
species.
The
manuscript
consolidates
recent
advancements
research,
highlighting
their
practical
applications
formulation
role
promoting
sustainability
aquaculture.
aims
provide
an
integrative
framework
for
understanding
antioxidants’
potential,
guiding
future
research
implementation
aquaculture
systems.
Frontiers in Microbiology,
Год журнала:
2023,
Номер
13
Опубликована: Янв. 6, 2023
Microorganisms
in
anaerobic
digestion
(AD)
are
easily
affected
by
ammonia,
especially
acetoclastic
methanogens.
Thus,
ammonia-suppressed
AD
systems,
acetate
degradation
is
reported
to
be
carried
out
mainly
the
cooperation
of
syntrophic
oxidizers
and
hydrogenotrophic
Previous
studies
have
revealed
ammonia
inhibition
on
microbial
flora
performance,
but
effect
mechanism
metabolism
remains
poorly
understood.
In
this
study,
we
constructed
a
mesophilic
chemostat
fed
with
as
sole
carbon
source,
gradually
increased
total
nitrogen
(TAN)
concentration
from
1
g
L-1
6
L-1,
employed
16S
rRNA
gene,
metagenomics,
metatranscriptomics
analysis
characterize
community
structure
metabolic
behavior.
The
results
showed
that
even
at
TAN
(pH
7.5),
methanogenesis
kept
normal,
biogas
production
was
approximately
92%
ratio
reached
99%,
suggesting
strong
tolerance
enriched.
gene
suggested
changed
along
concentration.
Methanothrix
predominated
methanogens
all
time,
which
dominant
species
replaced
M.
soehngenii
harundinacea
TAN.
Dominant
bacterial
also
Proteiniphilum
significant
positive
correlation
Meta-omics
absolute
microorganisms
were
Proteiniphilum,
both
highly
expressed
genes
for
anti-oxidative
stress.
second
methanogen
Methanosarcina
cleavage
CO2
reduction
pathways,
possibility
these
two
pathways
contributed
together.
some
other
Firmicutes
Synergistetes
likely
they
oxidization,
H2
generation,
electron
transfer.
These
well
played
critical
roles
under
conditions.
achievements
study
would
contribute
regulation
management
process.
Environmental Science and Ecotechnology,
Год журнала:
2024,
Номер
21, С. 100440 - 100440
Опубликована: Июнь 13, 2024
Anaerobic
digestion
(AD)
plays
a
significant
role
in
renewable
energy
recovery.
Upgrading
AD
from
thermophilic
(50–57
°C)
to
mesophilic
(30–38
conditions
enhance
process
stability
and
reduce
input
remains
challenging
due
the
high
sensitivity
of
microbiomes
temperature
fluctuations.
Here
we
compare
effects
two
decreasing-temperature
modes
55
35
°C
on
cell
viability,
microbial
dynamics,
interspecies
interactions.
A
sharp
transition
(ST)
is
one-step
by
20
d−1,
while
mild
(MT)
stepwise
1
d−1.
We
find
greater
decrease
methane
production
with
ST
(88.8%)
compared
MT
(38.9%)
during
period.
mode
overproduced
reactive
oxygen
species
1.6-fold,
increased
membrane
permeability
2.2-fold,
downregulated
metabolism
25.1%,
leading
apoptosis
anaerobes
1.9-fold
release
intracellular
substances
2.9-fold,
further
constraining
methanogenesis.
The
higher
(1.6
vs.
1.1
copies
per
gyrA)
metabolic
activity
acetate-dependent
methanogenesis
implied
more
efficient
steady
mesophilic,
MT-mediated
system.
Metagenomic
binning
network
analyses
indicated
that
induced
dysbiosis
keystone
greatly
enhanced
functional
redundancy,
causing
loss
syntrophic
interactions
redundant
pathways.
In
contrast,
interconnections
(average
degrees
44.9
22.1)
at
state
suggested
could
better
maintain
necessary
system
functionality
through
syntrophy
or
specialized
Adopting
transform
digesters
into
feasible
potentially
optimization
broader
application
practical
anaerobic
engineering.
