New Phytologist,
Год журнала:
2024,
Номер
244(2), С. 426 - 435
Опубликована: Авг. 19, 2024
Plant
response
to
water
stress
involves
multiple
timescales.
In
the
short
term,
stomatal
adjustments
optimize
some
fitness
function
commonly
related
carbon
uptake,
while
in
long
traits
including
xylem
resilience
are
adjusted.
These
optimizations
usually
considered
independently,
former
involving
aperture
and
latter
allocation.
However,
short-
long-term
interdependent,
as
'optimal'
term
depends
on
set
longer
term.
An
economics
framework
is
used
that
impact
short-term
behavior.
Two
analyzed
here
of
nonstomatal
limitations
(NSLs)
photosynthesis
at
low-water
potentials.
Results
show
optimality
requires
increase
with
climatic
aridity.
also
suggest
point
which
reach
50%
conductance
NSLs
capacity
constrained
approximately
a
2
:
1
linear
ratio;
however,
this
awaits
further
experimental
verification.
The
model
demonstrates
how
trait
coordination
arises
mathematically,
it
can
be
extended
many
other
cross
With
verification,
these
results
could
plant
modelling
when
information
limited.
Journal of Ecology,
Год журнала:
2022,
Номер
110(6), С. 1344 - 1355
Опубликована: Март 22, 2022
Leaf
morphological
traits
vary
systematically
along
climatic
gradients.
However,
recent
studies
in
plant
functional
ecology
have
mainly
analysed
quantitative
traits,
while
numerical
models
of
species
distributions
and
vegetation
function
focused
on
associated
with
resource
acquisition;
both
ignore
the
wider
significance
leaf
morphology.A
dataset
comprising
22
for
662
woody
from
92
sites,
representing
all
biomes
present
China,
was
subjected
to
multivariate
analysis
order
identify
leading
dimensions
trait
covariation
(correspondence
analysis),
quantify
phylogenetic
contributions
(canonical
correspondence
variation
partitioning)
characterise
co-occurring
syndromes
(
The Science of The Total Environment,
Год журнала:
2023,
Номер
868, С. 161711 - 161711
Опубликована: Янв. 20, 2023
The
frequency
of
extreme
drought
events
has
been
rising
worldwide,
but
due
to
its
unpredictability,
how
plants
will
respond
remains
poorly
understood.
Here,
we
aimed
characterize
the
hydraulics
and
photosynthesis
savanna
drought,
tested
whether
they
can
subsequently
recover
after
drought.
There
was
an
in
2019
Southwest
(SW)
China.
We
investigated
photosynthetic
gas
exchange,
leaf-,
stem-,
whole-shoot
hydraulic
conductance
18
plant
species
with
diverse
leaf
habits
(deciduous,
semi-deciduous
evergreen)
growth
forms
(tree
shrub)
from
a
dry-hot
valley
SW
China
for
three
rainy
seasons
2021.
also
compared
exchange
those
regular
year
(2014).
found
that
stomatal
maximum
rate
were
significantly
lower
during
than
wetter
years.
In
2019,
all
studied
maintained
at
their
minimum
level
observed,
which
could
be
related
high
vapor
pressure
deficits
(VPD,
>2
kPa).
However,
no
significant
difference
stem
shoot
detected
across
reductions
regulation
under
might
help
keep
function.
Stomatal
(2020
2021)
showed
comparable
or
even
higher
values
2014,
suggesting
recovery
exchange.
addition,
response
traits
convergent
forms.
Our
results
better
understand
physiological
mechanism
underlying
ecosystems
climate
change.
Frontiers in Plant Science,
Год журнала:
2024,
Номер
15
Опубликована: Янв. 29, 2024
Introduction
Canopy
species
need
to
shift
their
ecological
adaptation
improve
light
and
water
resources
utilization,
the
study
of
intraspecific
variations
in
plant
leaf
functional
traits
based
at
individual
scale
is
great
significance
for
evaluating
adaptability
climate
change.
Methods
In
this
study,
we
evaluate
how
giant
trees
relate
spatial
niche
specialization
along
a
vertical
gradient.
We
sampled
tropical
flagship
Parashorea
chinensis
around
60
meters
tall
divided
crowns
into
three
layers.
Fourteen
key
including
morphology,
photosynthetic,
hydraulic
chemical
physiology
were
measured
each
canopy
layer
investigate
variation
interrelationships
between
different
traits.
Additionally,
due
potential
impact
measurement
methods
(
in-situ
ex-situ
branch)
on
photosynthetic
physiological
parameters,
also
compared
effects
these
two
gas
exchange
measurements.
Results
discussion
In-situ
measurements
revealed
that
most
individual-to-individual
P.
varied
significantly
heights.
Leaf
such
as
midday
(MWP)
osmotic
(OP)
insignificantly
correlated
with
maximal
net
assimilation
rate
per
mass
A
).
addition,
discrepancies
found
parameters.
The
caused
decrease
by
53.63%,
27.86%,
38.05%
,
50.00%,
19.21%,
27.90%
saturation
point
These
findings
provided
insights
our
understanding
response
mechanisms
micro-habitat
Xishuangbanna
seasonal
rainforests
fine
adaption
resultant
decoupled
traits,
which
have
implications
strategies
under
environmental
changes.
Plant
functional
traits
represent
adaptive
strategies
to
the
environment,
linked
biophysical
and
biogeochemical
processes
ecosystem
functioning.
Compilations
of
trait
data
facilitate
research
in
multiple
fields
from
plant
ecology
through
land-surface
modelling.
Here
we
present
version
2
China
Trait
Database,
which
contains
information
on
morphometric,
physical,
chemical,
photosynthetic
hydraulic
1529
unique
species
140
sites
spanning
a
diversity
vegetation
types.
Version
has
five
improvements
compared
previous
version:
(1)
new
4-km
elevation
transect
edge
Tibetan
Plateau,
including
alpine
types
not
sampled
previously;
(2)
inclusion
related
processes,
specific
sapwood
conductance,
area
ratio
leaf,
wood
density
turgor
loss
point;
(3)
soil
properties
complement
existing
climate
(4)
assessments
flagging
reliability
individual
measurements;
(5)
standardized
templates
for
systematical
field
sampling
measurements.
Global Ecology and Biogeography,
Год журнала:
2023,
Номер
32(5), С. 668 - 682
Опубликована: Март 16, 2023
Abstract
Aim
Understanding
the
considerable
variability
and
drivers
of
global
leaf
photosynthetic
capacity
[indicated
by
maximum
carboxylation
rate
standardized
to
25°C
(
V
c,max25
)]
is
an
essential
step
for
accurate
modelling
terrestrial
plant
photosynthesis
carbon
uptake
under
climate
change.
Although
current
environmental
conditions
have
often
been
connected
with
empirical
theoretical
models
explain
through
acclimatization
adaptation,
long‐term
evolutionary
history
has
largely
neglected,
but
might
also
explicitly
play
a
role
in
shaping
variability.
Location
Global.
Time
period
Contemporary.
Major
taxa
studied
Terrestrial
plants.
Methods
We
compiled
geographically
comprehensive
dataset
C
3
plants
n
=
6917
observations
from
2157
species
425
sites
covering
all
major
biomes
world‐wide),
explored
biogeographical
phylogenetic
patterns
,
quantified
relative
importance
factors
driving
Results
found
that
differed
across
different
biomes,
higher
mean
values
relatively
drier
regions,
life‐forms,
non‐woody
woody
legumes
non‐leguminous
The
displayed
significant
signal
diverged
contrasting
manner
groups,
trend
along
axis
towards
more
modern
clades.
A
Bayesian
linear
mixed
model
revealed
(indicated
phylogeny
species)
explained
nearly
3‐fold
variation
than
present‐day
environment
(53
vs.
18%).
Main
conclusions
These
findings
contribute
assessment
variability,
highlighting
hence
photosynthesis.
Plant Cell & Environment,
Год журнала:
2024,
Номер
47(9), С. 3478 - 3493
Опубликована: Апрель 8, 2024
Stomatal
opening
in
plant
leaves
is
regulated
through
a
balance
of
carbon
and
water
exchange
under
different
environmental
conditions.
Accurate
estimation
stomatal
regulation
crucial
for
understanding
how
plants
respond
to
changing
conditions,
particularly
climate
change.
A
new
generation
optimality-based
modelling
schemes
determines
instantaneous
responses
from
trade-offs
between
gains
hydraulic
costs,
but
most
such
do
not
account
biochemical
acclimation
response
drought.
Here,
we
compare
the
performance
six
optimisation
models
with
without
accounting
photosynthetic
acclimation.
Using
experimental
data
37
species,
found
that
improves
prediction
assimilation
majority
tested
models.
Photosynthetic
contributed
significantly
reduction
photosynthesis
drought
conditions
all
Drought
effects
on
could
accurately
be
explained
by
impairment
functions
embedded
alone,
indicating
must
considered
improve
estimates
during
Journal of Experimental Botany,
Год журнала:
2023,
Номер
74(15), С. 4597 - 4612
Опубликована: Апрель 28, 2023
The
differential
stomatal
regulation
of
transpiration
among
plant
species
in
response
to
water
deficit
is
not
fully
understood,
although
several
hydraulic
traits
have
been
reported
influence
it.
This
knowledge
gap
partly
due
a
lack
direct
and
concomitant
experimental
data
on
transpiration,
conductance,
traits.
We
measured
sap
flux
density
(Js),
conductance
(gs),
different
five
crop
species.
Our
aim
was
contribute
establishing
the
causal
relationship
between
consumption
its
using
trait-based
approach.
results
showed
that
species-specific
Js
by
gs
overall
coordinated
with
functional
analysed.
Particularly
relevant
negative
significant
found
Huber
value
(Hv)
analogue
ratio
maximum
(Jsmax/gsmax)
which
can
be
understood
as
compensation
maintain
supply
leaves.
Hv
also
significantly
related
slope
vapour
pressure
explained
most
variability,
adding
up
evidence
recognizing
major
trait
relations.
Thus,
basis
for
tree
use
should
considered.
Journal of Advances in Modeling Earth Systems,
Год журнала:
2024,
Номер
16(3)
Опубликована: Фев. 29, 2024
Abstract
The
drought
resilience
of
forest
ecosystems
is
generally
believed
to
depend
on
the
dominant
tree
species'
hydraulic
traits.
These
traits
define
maximum
water
transport
capacity
and
degree
vulnerability
failure
a
species.
This
work
evaluates
effect
intraspecific
variability
simulated
use
in
Community
Land
Model
(CLM,
version
5.0).
We
selected
two
contrasting
broadleaved
species
performed
series
numerical
experiments
by
modifying
parameters
plant
curve
xylem
conductance
accounting
for
within
each
Our
prescribed
parameter
sets
represent
vulnerable
resistant
responses
deficit.
At
sites
with
an
ample
supply,
configuration
simulates
reduced
stress
increased
transpiration
compared
configuration.
Meanwhile,
model
results
are
counter‐intuitive
at
temporarily
dry
when
availability
limiting
factor.
demonstrate
emergent
role
as
modulator
strategy
model.
Using
default
value
conductance,
tends
overestimate
early
summer
drier
sites,
forcing
vegetation
experience
unrealistic
later
year.
findings
suggest
that
parameterization
important
yet
unresolved
problem
CLM
similar
land
surface
models.