Thermal Decoupling May Promote Cooling and Mitigate Heat Stress in Alpine Plants
Опубликована: Янв. 1, 2025
Язык: Английский
Thermal tolerance is linked to anatomical but not morphological leaf traits in woody species of Andean tropical montane forests
Functional Ecology,
Год журнала:
2025,
Номер
unknown
Опубликована: Апрель 24, 2025
Abstract
The
world
is
experiencing
a
rise
in
global
temperatures
as
result
of
climate
change.
Higher
along
with
more
frequent
heat
waves
negatively
impact
physiological
levels
and
ultimately
lead
to
plant
death.
Although
woody
species
have
different
strategies
regulate
leaf
temperature,
the
relative
importance
structural
anatomical
traits
temperature
regulation
remains
unclear.
We
evaluated
variation
thermal
tolerance
(
T
50
crit
)
among
17
an
Andean
Tropical
Montane
Forest
Colombia.
explored
how
18
can
explain
tolerance.
Our
findings
revealed
high
variability
tolerance,
structural,
species.
Thick
layers
upper
cuticle,
epidermis,
hypodermis
increased
.
However,
increases
were
only
associated
thickness.
stomatal
index,
trait
related
conductance
transpiration,
,
while
water
transport
did
not
correlate
results
highlight
contrasting
influence
tissues
on
diverse
plants
employ
cope
temperatures.
These
hold
significant
implications
for
climate‐smart
restoration
forests.
Read
free
Plain
Language
Summary
this
article
Journal
blog.
Язык: Английский
Ecotypic Variation in Leaf Thermoregulation and Heat Tolerance but Not Thermal Safety Margins in Tropical Trees
Plant Cell & Environment,
Год журнала:
2024,
Номер
unknown
Опубликована: Сен. 24, 2024
ABSTRACT
To
avoid
reaching
lethal
temperatures
during
periods
of
heat
stress,
plants
may
acclimate
either
their
biochemical
thermal
tolerance
or
leaf
morphological
and
physiological
characteristics
to
reduce
temperature
(
T
).
While
from
warmer
environments
have
a
greater
capacity
regulate
,
the
extent
intraspecific
variation
contribution
provenance
is
relatively
unexplored.
We
tested
whether
upland
lowland
provenances
four
tropical
tree
species
grown
in
common
garden
differed
safety
margins
by
measuring
traits,
midday
leaf‐to‐air
differences
(∆
)
critical
defined
chlorophyll
fluorescence
crit
Provenance
was
species‐
trait‐specific.
Higher
∆
were
observed
for
Terminalia
microcarpa
Castanospermum
australe
with
no
effects
other
two
species.
Within‐species
covariation
led
convergence
across
provenances.
future
studies
should
expand
number
investigated,
our
findings
suggest
that
not
differ
substantially
vulnerability
as
determined
margins,
despite
operating
.
Язык: Английский
Leaf Transpirational Cooling and Thermal Tolerance Vary Along the Spectrum of Iso‐Anisohydric Stomatal Regulation in Sand‐Fixing Shrubs
Plant Cell & Environment,
Год журнала:
2024,
Номер
unknown
Опубликована: Ноя. 18, 2024
Transpirational
cooling
is
crucial
for
plant
thermal
regulation
to
avoid
overheating;
however,
during
prolonged
and/or
acute
heat
stress
it
often
necessitates
stomatal
closure
reduce
the
risk
of
hydraulic
failure
due
dehydration.
The
intricate
interplay
between
regulation,
water
transport
and
use
may
govern
performance
in
water-limited
simultaneously
heat-stressed
environments,
yet
this
remains
inadequately
understood.
Here,
a
common
garden,
we
evaluated
functional
associations
among
physiological
characteristics
related
leaf
thermoregulation,
tolerance,
xylem
transport,
eight
shrub
species
commonly
used
fixing
active
sand
dunes
northern
China.
Our
study
showed
that
traits
associated
with
adaptation
hydraulics
were
closely
regulation.
More
isohydric
higher
efficiency
possessed
stronger
transpirational
capacity;
whereas
more
anisohydric
demonstrated
greater
tolerance
overheating.
Moreover,
was
strongly
coordinated
drought
reflected
by
turgor
loss
point.
These
results
underscore
importance
shaping
adaptive
strategies
provide
valuable
insights
into
coupling
heat-related
processes
plants
adapted
sandy
land
environments
prone
combined
stresses.
Язык: Английский