The
Southern
Ocean
and
the
Antarctic
Circumpolar
Current
create
environmental
conditions
that
serve
as
an
efficient
barrier
to
prevent
colonization
of
non-native
species
(NNS)
in
marine
ecosystems
Antarctica.
However,
warming
increasing
number
transport
opportunities
are
reducing
physiological
physical
barriers,
chances
NNS
arriving.
aim
this
study
was
determine
limits
survival
juvenile
mussels,
M.
chilensis,
under
current
those
projected
climate
change.
These
assessments
were
used
define
mussels
potential
for
establishment
region.
Experimental
exposed
four
treatments:
-1.5
°C
(Antarctic
winter),
2
summer),
4
projected)
8
(control)
80
days
a
combination
transcriptomics
approaches
investigate
mussel
response.
molecular
responses
congruent
with
results,
revealing
tolerance
winter
temperatures.
higher
regulated
differentially
expressed
gene
(DEGs)
reported
temperatures
(-1.5
ºC).
This
associated
activation
biological
processes
apoptosis
(up
regulated)
both
cell
division
cilium
assembly
(down
regulated).
reduced
feeding
rate
negative
scope
growth,
large
part
exposure
period
at
°C,
suggests
represents
chilensis
from
Magellanic
region
settling
Antarctic.
Although
not
robust
Antarctica
thermal
conditions,
future
scenarios
likely
weaken
these
barriers.
results
strongly
suggest
West
Peninsula
could
become
Mytilus
distributional
range,
especially
dispersal
aided
by
maritime
activity
across
Ocean.
Frontiers in Genetics,
Journal Year:
2023,
Volume and Issue:
14
Published: April 4, 2023
Introduction:
Heavy
metal
pollutants
can
have
long
lasting
negative
impacts
on
ecosystem
health
and
shape
the
evolution
of
species.
The
persistent
ubiquitous
nature
heavy
pollution
provides
an
opportunity
to
characterize
genetic
mechanisms
that
contribute
resistance
in
natural
populations.
Methods:
We
examined
variation
copper,
a
common
contaminant,
using
wild
collections
model
organism
Drosophila
melanogaster
.
Flies
were
collected
from
multiple
sites
varied
copper
contamination
risk.
characterized
phenotypic
within
among
populations
bulked
segregant
analysis
identify
regions
genome
resistance.
Results
Discussion:
Copper
with
clear
correspondence
between
level
historical
exposure
copper.
identified
288
SNPs
distributed
across
associated
Many
had
population-specific
effects,
but
some
consistent
effects
all
Significant
map
several
novel
candidate
genes
involved
refolding
disrupted
proteins,
energy
production,
mitochondrial
function.
also
one
SNP
near
CG11825
,
gene
homeostasis
compared
signatures
wild-derived
control
Synthetic
Population
Resource
(DSPR)
Genetic
Reference
Panel
(DGRP),
two
copper-naïve
laboratory
In
addition
which
was
as
previously
DSPR,
there
modest
overlap
copper-associated
Thirty-one
fell
DSPR
prior
study.
Collectively,
our
results
demonstrate
is
highly
polygenic,
loci
be
clearly
linked
toxicity
response.
mixture
parallel
points
complex
interplay
background
selection
regime
modifies
Cell Stress and Chaperones,
Journal Year:
2024,
Volume and Issue:
29(4), P. 552 - 566
Published: June 22, 2024
Heat
shock
proteins
(HSPs)
play
a
crucial
role
in
antioxidant
systems,
immune
responses,
and
enzyme
activation
during
stress
conditions.
Salinity
changes
can
cause
energy
expenditure
fish,
resulting
mortality,
especially
fingerlings.
The
purpose
of
this
study
was
to
examine
the
relationship
between
salinity
HSPs
stressed
fish
by
assessing
effects
various
HSP
inducers
(HSPis),
including
Pro-Tex®
(800
mM),
amygdalin
(80
novel
synthetic
compound
derived
from
pirano
piranazole
µM),
on
isolated
cells
Sterlet
Sturgeon
(Acipenser
ruthenus)
exposed
13
‰
(S13).
After
liver,
kidney,
gill
were
cultured,
HSPi
compounds
treated
vitro
presence
absence
salinity.
expression
patterns
HSP27,
HSP70,
HSP90
assessed
Western
blotting.
Biochemical
enzymes
(aspartate
aminotransferase,
alanine
alkaline
phosphatase,
lactate
dehydrogenase),
cortisol
levels,
parameters
(component
3,
immunoglobulin
M,
lysozyme)
measured
before
after
treatment
with
HSPis
+
S13.
According
these
findings,
positively
modulate
expression,
levels.
Furthermore,
they
increased
cell
survival
maintaining
levels
biochemical
activities
A.
ruthenus
under
saline
conditions
(P
<
0.0001).
In
conclusion,
increase
resistance
stress.
However,
results
also
indicated
that
reverse
adverse
effectiveness
approach
depends
further
research
into
ecological
factors
health
status
species,
vivo
combination
other
stresses.
Nature Communications,
Journal Year:
2024,
Volume and Issue:
15(1)
Published: Aug. 1, 2024
Abstract
Krill
are
vital
as
food
for
many
marine
animals
but
also
impacted
by
global
warming.
To
learn
how
they
and
other
zooplankton
may
adapt
to
a
warmer
world
we
studied
local
adaptation
in
the
widespread
Northern
krill
(
Meganyctiphanes
norvegica
).
We
assemble
characterize
its
large
genome
compare
genome-scale
variation
among
74
specimens
from
colder
Atlantic
Ocean
Mediterranean
Sea.
The
19
Gb
likely
evolved
through
proliferation
of
retrotransposons,
now
targeted
inactivation
extensive
DNA
methylation,
contains
duplicated
genes
associated
with
molting
vision.
Analysis
760
million
SNPs
indicates
homogenizing
gene-flow
populations.
Nevertheless,
detect
signatures
adaptive
divergence
across
hundreds
genes,
implicated
photoreception,
circadian
regulation,
reproduction
thermal
tolerance,
indicating
polygenic
light
temperature.
top
gene
candidate
ecological
was
nrf-6
,
lipid
transporter
variant
that
contribute
early
spring
reproduction.
Such
could
become
increasingly
important
fitness
stocks.
Our
study
underscores
uneven
distribution
variation,
necessitating
characterization
genetic
natural
populations
understand
their
potential,
predict
risks
support
ocean
conservation
face
climate
change.
Physiologia Plantarum,
Journal Year:
2022,
Volume and Issue:
174(6)
Published: Oct. 30, 2022
Photosynthetic
algae
are
the
main
primary
producers
in
polar
regions,
form
basis
of
food
webs,
and
responsible
for
a
significant
portion
global
carbon
fixation.
Many
cold-water
psychrophiles
that
thrive
cold
but
cannot
grow
at
moderate
temperatures
(≥20°C).
Polar
regions
risk
rapid
warming
caused
by
climate
change,
sensitivity
psychrophilic
to
rising
makes
them,
ecosystems
they
inhabit,
particularly
vulnerable.
Recent
research
on
Antarctic
psychrophile
Chlamydomonas
priscuii,
an
emerging
algal
model,
has
revealed
unique
adaptations
life
permanent
cold.
Additionally,
genome
sequencing
C.
priscuii
its
relative
sp.
ICE-L
given
rise
plethora
computational
tools
can
help
elucidate
genetic
psychrophily.
This
minireview
summarizes
new
advances
characterizing
heat
stress
responses
examines
their
extraordinary
temperature
increases.
Further
this
field
will
determine
impact
change
from
threatened
environments.
Stress Biology,
Journal Year:
2023,
Volume and Issue:
3(1)
Published: Sept. 6, 2023
Among
the
plant
molecular
mechanisms
capable
of
effectively
mitigating
effects
adverse
weather
conditions,
heat
shock
proteins
(HSPs),
a
group
chaperones
with
multiple
functions,
stand
out.
At
time
full
progress
on
omic
sciences,
they
look
very
promising
in
genetic
engineering
field,
especially
order
to
conceive
superior
genotypes,
potentially
tolerant
abiotic
stresses
(AbSts).
Recently,
some
works
concerning
certain
families
maize
HSPs
(ZmHSPs)
were
published.
However,
there
was
still
lack
study
that,
high
degree
criteria,
would
fully
conglomerate
them.
Using
distinct
but
complementary
strategies,
we
have
prospected
as
many
ZmHSPs
candidates
possible,
gathering
more
than
thousand
accessions.
After
detailed
data
mining,
accounted
for
182
validated
ones,
belonging
seven
families,
which
subcategorized
into
classes
potential
functional
parity.
In
them,
identified
dozens
motifs
similarity
from
different
kingdoms,
may
help
explain
their
poorly
understood
means
action.
Through
silico
and
vitro
approaches,
compared
expression
levels
after
controlled
exposure
several
AbSts'
sources,
applied
at
diverse
tissues,
varied
phenological
stages.
Based
gene
ontology
concepts,
analyzed
them
perspectives
term
enrichment.
We
also
searched,
model
plants
close
species,
orthologous
genes.
With
all
these
new
insights,
culminated
plentiful
supplementary
material,
rich
tables,
aim
constitute
fertile
consultation
source
those
researchers
attracted
by
interesting
stress
proteins.