Plants,
Год журнала:
2022,
Номер
11(24), С. 3489 - 3489
Опубликована: Дек. 13, 2022
The
genus
Arenaria
(Caryophyllaceae)
comprises
approximately
300
species
worldwide;
however,
to
date,
just
six
of
these
taxa
have
been
investigated
in
terms
their
genome
size.
main
subject
the
present
study
is
A.
ciliata
complex,
with
special
focus
on
subsp.
bernensis,
an
endemic
plant
occurring
Swiss
Northern
Alps.
Altogether,
16
populations
and
77
individuals
complex
sampled
sizes
were
estimated
using
flow
cytometry,
including
s.str.,
multicaulis,
gothica.
bernensis
shows
highest
2c-value
6.91
pg
DNA,
while
gothica
showed
2c
=
3.69
pg,
s.str.
1.71
multicaulis
1.57
pg.
These
results
confirm
very
high
ploidy
level
(2n
20x
200)
compared
other
as
detected
by
our
chromosome
counting
previously
documented
earlier
work.
size
and,
thus,
also
level,
stable
across
whole
distribution
area
this
taxon.
delivers
additional
support
for
taxonomic
distinctiveness
alpine
which
strongly
aligns
differences
morphology,
phylogeny,
phenology,
ecology,
communities,
described
previously.
In
affirming
differences,
further
now
exists
re-consider
status
Upgrading
full
rank
would
significantly
improve
conservation
prospects
taxon,
as,
because
its
precise
ecological
adaptation
summit
habitats,
faces
acute
threats
from
accelerated
climate
warming.
Ecological Indicators,
Год журнала:
2023,
Номер
155, С. 111046 - 111046
Опубликована: Окт. 9, 2023
Climate
change
has
emerged
as
one
of
the
major
threats
to
biodiversity
and
Hindu
Kush
Himalaya
(HKH)
is
facing
challenges
due
a
higher
rate
elevation
dependent
warming
erratic
rainfall.
The
rich
bounty
ecosystem
services
provided
by
this
‘water
tower’
‘Third
Pole’
are
under
risk.
Though
there
scattered
sectoral
knowledge
available,
comprehensive
understanding
on
climate
its
impact
lacking
in
HKH.
To
fill
gap,
systematic
literature
review
using
search,
appraisal,
synthesis,
analysis
(SALSA)
was
undertaken
look
at
temporal
spatial
trends
research
focusing
impacts
services.
increasing
trend
evolution
from
multidisciplinarity
approach
with
focus
suggested
strong
influence
regional
priority
global
discourse.
There
clear
pattern
biophysical
environmental
focused
early
phase
1990s
societal
concerns
highlighting
vulnerability,
adaptation,
mitigation
measures
later
phases.
also
revealed
an
multidisciplinary,
networking
bringing
innovative
tools
linking
biodiversity.
However,
showed
greater
Tibetan
plateau
alpine
decreasing
interest
forest
ecosystems,
very
negligible
wetlands.
Studies
assessments
but
relatively
low
rate.
Better
representation
investments
based
vulnerable
underrepresented
countries
collaborative
emerging
areas
such
restoration
larger
scale
nature-based
solutions
could
contribute
resilience
Summary
Early
studies
of
the
textbook
mixed‐ploidy
system
Biscutella
laevigata
highlighted
diploids
restricted
to
never‐glaciated
lowlands
and
tetraploids
at
high
elevations
across
European
Alps,
promoting
hypothesis
that
whole‐genome
duplication
(WGD)
is
advantageous
under
environmental
changes.
Here
we
addressed
long‐held
hypotheses
on
role
hybridisation
origin
tetraploids,
their
single
vs
multiple
origins,
whether
a
shift
in
climatic
niche
accompanied
WGD.
Climatic
modelling
together
with
spatial
genetics
coalescent
based
ddRAD‐seq
genotyping
17
diploid
19
tetraploid
populations
was
used
revisit
evolution
this
species
complex
space
time.
Diploids
differentiated
into
four
genetic
lineages
corresponding
allopatric
glacial
refugia
onset
last
ice
age,
whereas
displaying
tetrasomic
inheritance
formed
uniform
group
originated
from
southern
before
maximum.
Derived
occurring
elevation,
autotetraploids
likely
inherited
adaptation
elevation
rather
than
having
evolved
it
through
or
after
They
further
presented
considerable
postglacial
expansion
Alps
underwent
admixture
diploids.
Although
underpinnings
successful
remain
elusive,
differentiation
B.
chiefly
driven
by
history
Alps.
Alpine Botany,
Год журнала:
2024,
Номер
134(1), С. 29 - 50
Опубликована: Март 1, 2024
Abstract
A
little
more
than
10%
of
the
vascular
plant
flora
native
to
European
Alps
is
endemic
this
area.
It
has
long
been
noticed
that
distribution
endemics
across
very
uneven.
While
most
are
found
along
southern
edge
Alps,
with
some
also
on
its
western,
eastern,
and
northeastern
edges,
northern
or
less
between
Lake
Geneva
in
west
Traun
east
harbours
almost
no
endemics.
The
often
related
location
glacial
refugia.
Accordingly,
virtual
absence
from
explained
unsuitability
climatic
conditions
for
survival
alpine
plants
there.
After
discussing
evidence
existence
refugia
species
north
I
will
examine
how
these
differed
Alps.
conclude
uneven
best
by
different
climate
through
time
south
These
differences
affected
spatial
structure
extent
refugia,
length
isolation
refugial
populations,
selective
Frontiers in Plant Science,
Год журнала:
2025,
Номер
16
Опубликована: Март 20, 2025
Introduction
In
the
European
Alps,
Pleistocene
climate
oscillations
resulted
in
geographical
range
expansions
and
restrictions
of
species.
Postglacial
recolonizations
often
result
secondary
contact
hybridization
vicariant
species,
thereby
creating
hybrid
zones
with
patterns
introgression.
Here,
we
compare
genetic
structure
two
between
willow
species
pairs
occurring
Alpine
System.
Supplemented
by
morphological
ecological
data,
try
to
understand
factors
shaping
their
influence
on
filling
patterns.
Methods
RAD
sequencing
morphometric
data
were
used
characterize
biogeographical
history,
diversity
zone
each
pair.
Vegetation
relevés
distribution
models
provided
context
support.
Key
results
Results
suggest
that
recolonization
Alps
happened
from
peripheral
glacial
refugia,
resulting
broad
Eastern
both
pairs.
Both
show
introgression,
but
differ
symmetry
intensity
gene
flow,
type
introgressed
loci,
range.
Habitat
preferences
do
not
indicate
barriers
recolonization.
Conclusions
Hybrid
only
affect
flow
also
appear
impact
Annals of Botany,
Год журнала:
2023,
Номер
131(4), С. 623 - 634
Опубликована: Янв. 21, 2023
Abstract
Background
and
Aims
Historical
changes
in
environmental
conditions
colonization–extinction
dynamics
have
a
direct
impact
on
the
genetic
structure
of
plant
populations.
However,
understanding
how
past
influenced
evolution
species
with
high
gene
flow
is
challenging
when
signals
for
isolation
adaptation
are
swamped
by
flow.
We
investigated
spatial
distribution
widespread
terrestrial
orchid
Epipactis
helleborine
to
identify
glacial
refugia,
characterize
postglacial
population
assess
its
adaptive
potential.
Methods
Ecological
niche
modelling
was
used
locate
possible
refugia
recolonization
opportunities
E.
helleborine.
A
large
single-nucleotide
polymorphism
(SNP)
dataset
obtained
through
genotyping
sequencing
define
diversity
sources
Outlier
analyses
were
elucidate
local
environment
contributed
divergence.
Key
Results
The
climatically
suitable
areas
restricted
during
Last
Glacial
Maximum
Mediterranean,
south-western
Europe
small
Alps
Carpathians.
Within-population
(mean
expected
heterozygosity,
0.373
±
0.006;
observed
0.571
0.012;
allelic
richness,
1.387
0.007).
Italy
central
likely
acted
as
important
recolonization.
Adaptive
SNPs
associated
temperature,
elevation
precipitation.
Conclusions
Forests
Mediterranean
Carpathians
Postglacial
migration
northwards
higher
elevations
resulted
dispersal
diversification
Italy,
geographical
divergent
Greek
Italian
Distinguishing
from
neutral
allowed
us
conclude
that
has
potential
climate
change
demonstrates
historical
can
be
identified
even
