bioRxiv (Cold Spring Harbor Laboratory),
Год журнала:
2024,
Номер
unknown
Опубликована: Фев. 18, 2024
Insect
performance
is
intrinsically
linked
to
environmental
temperature,
and
surviving
through
winter
represents
a
key
challenge
for
temperate,
alpine,
polar
species.
To
overwinter,
insects
have
adapted
wide
range
of
strategies
become
truly
cold
hardy.
However,
while
the
physiological
mechanisms
underlying
ability
avoid
or
tolerate
freezing
been
well-studied,
little
attention
has
given
maintaining
ion
homeostasis
at
frigid
temperatures
in
these
species,
despite
this
being
central
issue
susceptible
mild
chilling.
Here
we
investigate
how
prolonged
exposure
just
above
supercooling
point
affects
balance
freeze-avoiding
larvae
mountain
pine
beetle
(Dendroctonus
ponderosae)
autumn,
mid-winter,
spring,
relate
it
organismal
recovery
times
survival
outcomes.
We
found
that
hemolymph
was
gradually
disrupted
during
first
day
exposure,
characterized
by
hyperkalemia
hyponatremia,
after
which
plateau
reached
maintained
rest
seven
experiment.
The
degree
ionoregulatory
collapse
experienced
correlated
strongly
with
times,
followed
similar
asymptotical
progression.
Mortality
increased
slightly
most
severe
exposures,
where
K+
concentration
highest,
logistic
relationship
between
hyperkalemia.
Thus,
tolerance
D.
ponderosae
appears
limited
prevent
manner
less
tolerant
chill-susceptible
insects,
albeit
much
lower
temperatures.
Furthermore,
posit
prerequisite
evolution
insect
freeze
avoidance
convergent
ancestral
maintain
extreme
stress.
Veterinary Medicine and Science,
Год журнала:
2022,
Номер
9(1), С. 181 - 190
Опубликована: Дек. 8, 2022
Abstract
Objectives
The
response
of
mammals
to
cold
environment
is
a
complex
physiological
activity,
and
its
underlying
mechanism
must
be
analyzed
from
multiple
perspectives.
Skeletal
muscle
an
important
thermogenic
tissue
that
maintains
body
temperature
in
mammals.
We
dissected
the
molecular
pig
skeletal
by
performing
comparative
transcriptome
analysis
Enshi
black
pig.
Methods
Three
pigs
were
subjected
acute
stress
(3
days),
three
acclimation
(58
used
as
controls.
RNA‐seq
was
screen
differentially
expressed
genes
(DEGs)
muscle.
Results
Using
methods,
we
identified
1241
DEGs
within
group
1886
group.
Prolonged
exposure
induced
more
gene
expression
changes.
A
total
540
key
cold‐responsive
found,
their
trends
consistent
Gene
pattern
showed
there
significant
differences
between
low‐temperature
treatment
groups
control
group,
also
individuals
after
long‐term
treatment.
Analysis
revealed
134
pathways
significantly
enriched
adaptation
98
71
shared
two
groups.
mainly
related
lipid,
amino
acid,
carbohydrate
metabolism;
signal
transduction;
endocrine,
immune,
nervous
system;
cardiovascular
disease;
infectious
diseases
caused
bacteria
or
viruses;
neurodegenerative
disease.
Conclusions
In
conclusion,
this
study
provides
insights
into
porcine
under
environment.
data
may
assist
further
research
on
exposure.
Journal of Plankton Research,
Год журнала:
2023,
Номер
45(5), С. 751 - 762
Опубликована: Авг. 1, 2023
The
study
of
a
species'
thermal
tolerance
and
vital
rates
responses
provides
useful
metrics
to
characterize
its
vulnerability
ocean
warming.
Under
prolonged
stress,
plastic
adaptive
processes
can
adjust
the
physiology
organisms.
Yet
it
is
uncertain
whether
species
expand
their
upper
limits
cope
with
rapid
extreme
changes
in
environmental
temperature.
In
this
study,
we
reared
marine
copepod
Paracartia
grani
at
control
(19°C)
warmer
conditions
(25°C)
for
>18
generations
assessed
survival
fecundity
under
short-term
exposure
range
temperatures
(11-34°C).
After
multigenerational
warming,
acute
(24
h)
increased
by
1-1.3°C,
although
enhancement
decreased
0.3-0.8°C
after
longer
stress
(7
days).
Warm-reared
copepods
were
smaller
produced
significantly
fewer
offspring
optimum
No
shift
breadth
reproductive
response
was
observed.
warm-reared
up
21-fold
higher
than
control.
Our
results
show
that
chronic
warming
improved
P.
grani,
therefore,
enhancing
chances
persist
heat
events.
bioRxiv (Cold Spring Harbor Laboratory),
Год журнала:
2024,
Номер
unknown
Опубликована: Фев. 18, 2024
Insect
performance
is
intrinsically
linked
to
environmental
temperature,
and
surviving
through
winter
represents
a
key
challenge
for
temperate,
alpine,
polar
species.
To
overwinter,
insects
have
adapted
wide
range
of
strategies
become
truly
cold
hardy.
However,
while
the
physiological
mechanisms
underlying
ability
avoid
or
tolerate
freezing
been
well-studied,
little
attention
has
given
maintaining
ion
homeostasis
at
frigid
temperatures
in
these
species,
despite
this
being
central
issue
susceptible
mild
chilling.
Here
we
investigate
how
prolonged
exposure
just
above
supercooling
point
affects
balance
freeze-avoiding
larvae
mountain
pine
beetle
(Dendroctonus
ponderosae)
autumn,
mid-winter,
spring,
relate
it
organismal
recovery
times
survival
outcomes.
We
found
that
hemolymph
was
gradually
disrupted
during
first
day
exposure,
characterized
by
hyperkalemia
hyponatremia,
after
which
plateau
reached
maintained
rest
seven
experiment.
The
degree
ionoregulatory
collapse
experienced
correlated
strongly
with
times,
followed
similar
asymptotical
progression.
Mortality
increased
slightly
most
severe
exposures,
where
K+
concentration
highest,
logistic
relationship
between
hyperkalemia.
Thus,
tolerance
D.
ponderosae
appears
limited
prevent
manner
less
tolerant
chill-susceptible
insects,
albeit
much
lower
temperatures.
Furthermore,
posit
prerequisite
evolution
insect
freeze
avoidance
convergent
ancestral
maintain
extreme
stress.
