Tree Physiology,
Год журнала:
2023,
Номер
43(8), С. 1383 - 1399
Опубликована: Апрель 26, 2023
Abstract
As
the
global
climate
warms,
a
key
question
is
how
increased
leaf
temperatures
will
affect
tree
physiology
and
coupling
between
air
in
forests.
To
explore
impact
of
increasing
on
plant
performance
open
air,
we
warmed
leaves
canopy
two
mature
evergreen
forests,
temperate
Eucalyptus
woodland
tropical
rainforest.
The
heaters
consistently
maintained
at
target
4
°C
above
ambient
temperatures.
Ambient
(Tleaf)
were
mostly
coupled
to
(Tair),
but
times,
could
be
8–10
warmer
than
temperatures,
especially
full
sun.
At
both
sites,
Tleaf
was
higher
(Tair
>
25
°C),
cooler
lower
Tair,
contrary
‘leaf
homeothermy
hypothesis’.
Warmed
showed
significantly
stomatal
conductance
(−0.05
mol
m−2
s−1
or
−43%
across
species)
net
photosynthesis
(−3.91
μmol
−39%),
with
similar
rates
respiration
common
temperature
(no
acclimation).
Increased
due
future
warming
reduce
carbon
assimilation
via
reduced
these
potentially
weakening
land
sink
New Phytologist,
Год журнала:
2024,
Номер
243(2), С. 648 - 661
Опубликована: Май 17, 2024
Summary
Elevated
air
temperature
(
T
)
and
vapour
pressure
deficit
(VPD
significantly
influence
plant
functioning,
yet
their
relative
impacts
are
difficult
to
disentangle.
We
examined
the
effects
of
elevated
(+6°C)
VPD
(+0.7
kPa)
on
growth
physiology
six
tropical
tree
species.
Saplings
were
grown
under
well‐watered
conditions
in
climate‐controlled
glasshouses
for
6
months
three
treatments:
(1)
low
,
(2)
high
(3)
.
To
assess
acclimation,
physiological
parameters
measured
at
a
set
temperature.
Warm‐grown
plants
had
reduced
stomatal
conductance
increased
instantaneous
water
use
efficiency
compared
Photosynthetic
biochemistry
thermal
tolerance
crit
unaffected
by
but
caused
J
max25
decrease
increase.
Sapling
biomass
accumulation
all
species
responded
positively
an
increase
limited
growth.
This
study
shows
that
limitation
even
moderate
increases
can
productivity
rates
independently
from
has
important
implications
modelling
climate
change
forests.
Plant Cell & Environment,
Год журнала:
2024,
Номер
47(10), С. 3953 - 3965
Опубликована: Июнь 7, 2024
Abstract
Accurate
estimation
of
photosynthesis
is
crucial
for
ecosystem
carbon
cycle
modelling.
Previous
studies
have
established
an
empirical
relationship
between
photosynthetic
capacity
(maximum
carboxylation
rate,
V
cmax
;
maximum
electron
transport
J
max
)
and
leaf
chlorophyll
(Chl)
content
to
infer
global
capacity.
However,
the
basis
Chl‐V
remains
unclear,
which
further
evidenced
by
temporal
variations
in
relationship.
Using
multiple
years
observations
four
deciduous
tree
species,
we
found
that
acclimate
photosynthetically
active
radiation
faster
(4–8
weeks)
than
Chl
(10–12
weeks).
This
mismatch
scales
causes
seasonality
‐Chl
To
account
mismatch,
used
a
fluorescence
parameter
(quantum
yield
Photosystem
II,
Φ(II))
tighten
Φ(II)
×
correlated
with
(
r
2
=
0.74
0.72
respectively)
better
only
0.7
0.6
respectively).
It
indicates
accounts
short‐term
adjustment
light,
was
not
captured
Chl.
Our
study
advances
our
understanding
ecophysiological
how
from
fluorescence,
guides
large‐scale
simulations
using
remote
sensing.
Journal of Materials Chemistry A,
Год журнала:
2023,
Номер
11(34), С. 18419 - 18425
Опубликована: Янв. 1, 2023
A
tadpole-type
amphiphilic
monomer
containing
cyanostilbene
and
oligo(ethylene
glycol)
chains
has
been
designed
synthesized,
which
can
be
used
to
construct
a
thermo-responsive
light-harvesting
system
in
water
with
tunable
white-light
emission.
Tree Physiology,
Год журнала:
2023,
Номер
43(8), С. 1383 - 1399
Опубликована: Апрель 26, 2023
Abstract
As
the
global
climate
warms,
a
key
question
is
how
increased
leaf
temperatures
will
affect
tree
physiology
and
coupling
between
air
in
forests.
To
explore
impact
of
increasing
on
plant
performance
open
air,
we
warmed
leaves
canopy
two
mature
evergreen
forests,
temperate
Eucalyptus
woodland
tropical
rainforest.
The
heaters
consistently
maintained
at
target
4
°C
above
ambient
temperatures.
Ambient
(Tleaf)
were
mostly
coupled
to
(Tair),
but
times,
could
be
8–10
warmer
than
temperatures,
especially
full
sun.
At
both
sites,
Tleaf
was
higher
(Tair
>
25
°C),
cooler
lower
Tair,
contrary
‘leaf
homeothermy
hypothesis’.
Warmed
showed
significantly
stomatal
conductance
(−0.05
mol
m−2
s−1
or
−43%
across
species)
net
photosynthesis
(−3.91
μmol
−39%),
with
similar
rates
respiration
common
temperature
(no
acclimation).
Increased
due
future
warming
reduce
carbon
assimilation
via
reduced
these
potentially
weakening
land
sink
