Influence of seed mass and shape on light plasticity of germination of alpine plants on the Tibetan Plateau: The role of photoblastic taxa, dispersal ability, and life history
Global Ecology and Conservation,
Год журнала:
2024,
Номер
51, С. e02896 - e02896
Опубликована: Март 12, 2024
Responses
of
post-disposal
germination
to
light
play
a
crucial
role
in
shaping
niches
and
determining
the
success
seedling
establishment,
ultimately
impacting
species
distribution
community
composition.
Seed
traits
are
pivotal
factors
that
influence
species'
germination,
dispersal,
life
history
strategies.
However,
it
remains
unclear
whether
relationship
between
seed
plasticity
is
regulated
by
such
as
history,
photoblastic
taxa,
dispersal
ability.
We
measured
shape
mass
114
on
grasslands
Tibetan
Plateau.
Germination
experiments
were
conducted
under
two
conditions:
dark
light.
also
classified
based
taxa
(photostimulation
vs.
photoinhibition),
(annual
perennial),
ability
(weak
strong).
Phylogenetic
structural
equation
models
(SEM)
used
test
complex
traits,
ability,
plasticity.
found
neither
nor
differed
taxa.
Species
with
photostimulation
exhibited
greater
compared
photoinhibition
Non-spherical
seeds
(elongated
or
flat)
possessed
low
germination.
The
varied
different
Specifically,
species,
increased
was
associated
higher
whereas
an
opposite
evident.
Moreover,
indirectly
influenced
via
shape.
Our
results
imply
combinations
can
strategies
response
stimulation,
which
turn
may
differentiation
persistence
soil.
Furthermore,
affect
implies
reproductive
strategy
adapt
environment
be
multi-faceted
Язык: Английский
Large and non-spherical seeds are less likely to form a persistent soil seed bank
Proceedings of the Royal Society B Biological Sciences,
Год журнала:
2024,
Номер
291(2024)
Опубликована: Июнь 1, 2024
There
is
some
evidence
that
seed
traits
can
affect
the
long-term
persistence
of
seeds
in
soil.
However,
findings
on
this
topic
have
differed
between
systems.
Here,
we
brought
together
a
worldwide
database
data
for
1474
species
to
test
generality
mass–shape–persistence
relationships.
We
found
significant
trend
low
be
associated
with
larger
and
less
spherical
seeds.
relationship
varied
across
different
clades,
growth
forms
ecological
preferences.
Specifically,
relationships
were
more
pronounced
Poales
than
other
order
clades.
Herbaceous
tend
sites
soil
sand
content
precipitation
stronger
shape
higher
precipitation.
For
woody
plants,
morphology
was
high
Improving
ability
predict
bank
formation
process,
including
burial
persistence,
could
benefit
utilization
morphology–persistence
management
strategies
vegetation
restoration
controlling
invasion
diverse
types
environments.
Язык: Английский
Variation in Thickness of Embryo Covering Structures and Their Role in the Regulation of Seed Physiological Dormancy of Chenopodium hircinum (Amaranthaceae)
Paola Fernanda Agüero-Martínez,
Leonardo Cardozo,
C. Gómez
и другие.
Plants,
Год журнала:
2024,
Номер
13(19), С. 2832 - 2832
Опубликована: Окт. 9, 2024
Chenopodium
hircinum,
the
putative
wild
ancestor
of
quinoa,
is
a
source
traits
that
could
improve
tolerance
crop
quinoa
to
high
temperatures.
However,
seeds
C.
hircinum
have
physiological
dormancy
(PD),
which
an
obstacle
for
plant
propagation
and
use
in
breeding
programs.
We
studied
intraspecific
variability
morpho-anatomical
embryo
covering
structures
their
association
with
PD.
also
evaluated
effects
different
dormancy-breaking
treatments
on
PD
alleviation
germination.
Seeds
were
dispersed
remnant
perianth
persistent
pericarp
be
removed
by
scraping.
The
seed
coat
was
formed
palisade
cells
impregnated
tannins,
contained
thin
layer
peripheral
endosperm
surrounding
embryo.
In
our
investigation,
thickness
(P)
and/or
(SC)
varied
among
populations.
Populations
higher
P
SC
showed
lower
percentages
germination
water
absorption.
combined
treatment
(bleach
+
perforated
coverings
gibberellic
acid)
promoted
release
increased
non-deep
dormancy.
Based
previous
knowledge
about
results,
we
conclude
coverings,
especially
coat,
important
role
control,
imposing
mechanical
restraint
radicle
emergence.
Язык: Английский
Variation in Seed Morphological Traits Affects the Dispersal Strategies of Chromolaena odorata Following Invasion
Plants,
Год журнала:
2024,
Номер
13(13), С. 1747 - 1747
Опубликована: Июнь 24, 2024
Seed
germination
and
dispersal
have
an
important
impact
on
the
establishment
spread
of
invasive
plants.
Understanding
extent
intraspecific
seed
trait
variations
can
enhance
our
understanding
how
plants
respond
to
environmental
change
after
introduction
help
predict
dynamic
species
under
future
conditions.
However,
less
attention
has
been
given
variation
in
traits
within
as
opposed
among
species.
We
compared
production,
morphological
traits,
ability,
seedling
performance
Chromolaena
odorata
from
10
introduced
populations
Asia
12
native
America
a
common
garden.
The
results
showed
that
range
(introduced
vs.
native)
climate
affected
these
traits.
Compared
with
population,
had
higher
numbers
per
capitula,
lighter
seeds,
potential
ability
seeds
(lower
terminal
velocity)
but
lower
rates
lengths.
Climatic
clines
capitula
pappus
length
were
observed;
however,
differed
between
populations.
Trait
covariation
patterns
also
different
both
ranges.
In
populations,
there
was
trade-off
mass,
while
this
relationship
not
found
for
These
indicate
C.
alters
ecological
strategy
following
invasion,
which
facilitates
its
fast
contributes
successful
invasion
Язык: Английский
Phytosociological Investigations on the Afroalpine Vegetation of the Ruwenzori Mountains (Uganda)
Land,
Год журнала:
2024,
Номер
13(11), С. 1752 - 1752
Опубликована: Окт. 25, 2024
This
paper
presents
the
results
of
a
phytosociological
study
on
Afroalpine
vegetation
Ruwenzori
Mountains,
one
most
prominent
mountain
ranges
in
Africa.
marks
pioneering
comprehensive
investigation
into
plant
communities
this
region,
which
holds
significant
phytogeographic
importance.
Through
statistical
analyses,
eight
distinct
communities,
three
new
alliances,
two
orders,
and
class
were
identified
within
altitudinal
range
3500
to
4600
m
above
sea
level.
These
are
well-defined
from
both
floristic
ecological
perspectives.
Hierarchical
classification
was
conducted
using
quantitative
Sørensen
(Bray-Curtis)
distance
measure
beta
flexible
linkage
method.
Furthermore,
indicator
species
for
each
group
determined
by
calculating
fidelity
constancy
(occurrence
frequency)
classified
dataset.
To
assess
validity
results,
non-metric
multidimensional
scaling
(NMDS)
carried
out.
analyses
provide
first
arrangement
providing
solid
framework
valuable
insights
its
characteristics.
Язык: Английский