Dual Controls of Shrub Encroachment in Semiarid Grasslands: Ectomycorrhizal Fungi and Soil Nitrogen Cycling
Land Degradation and Development,
Год журнала:
2025,
Номер
unknown
Опубликована: Март 19, 2025
ABSTRACT
Shrub
encroachment
significantly
impacts
biodiversity
and
ecosystem
functions
in
grassland
ecosystems.
Soil
microbial
communities
may
play
a
key
role
this
process.
Previous
studies
have
focused
on
plant
competition
soil
abiotic
factors,
but
the
specific
biological
mechanisms
by
which
microbiota
drive
shrub
remained
poorly
understood.
Through
integrated
vegetation
surveys
high‐throughput
sequencing
of
across
gradients
Inner
Mongolia,
we
assessed
composition
functional
genes
importance
value.
We
found
that
value
closely
correlated
with
limited
resources,
including
water
nitrogen
(N),
during
encroachment.
Ectomycorrhizal
(EcM)
fungi
were
recruited
semishrub
Artemisia
ordosica
,
increasing
its
competitiveness
under
conditions
resource
scarcity.
Changes
community
affected
N
cycling
reducing
abundance
involved
fixation,
nitrification,
nitrate
assimilation.
Concurrently,
shrubs
preferred
(NO
3
−
‐N)
over
herbaceous
plants
nutrient‐poor
environments.
The
was
facilitated
EcM
fungi,
enabling
them
to
thrive
N‐deficient
arid
environments
preferentially
utilize
NO
‐N.
Our
findings
establish
novel
microbial‐mediated
pathway
driving
encroachment,
fungal
symbionts
enable
host
alleviate
limitations
through
modified
nutrient
acquisition
strategies.
These
results
suggest
targeted
manipulation
associations
could
inform
restoration
strategies
shrub‐encroached
grasslands
highlight
need
for
management
approach
accounts
dynamics.
Язык: Английский
DNA metabarcode analyses reveal similarities and differences in plant microbiomes of industrial hemp and medicinal Cannabis in China
Frontiers in Microbiology,
Год журнала:
2025,
Номер
16
Опубликована: Апрель 15, 2025
Endophytic
bacteria
within
plant
tissues
play
crucial
roles
in
health,
stress
tolerance,
and
contribute
to
the
metabolite
diversity
of
host
plants.
Cannabis
sativa
L.
is
an
economically
significant
plant,
with
industrial
hemp
(IH)
medicinal
(MC)
being
two
main
cultivars.
However,
composition
functional
traits
their
endophytic
bacterial
communities
roots
leaves
are
not
well
understood.
In
this
study,
DNA
metabarcode
sequencing
were
employed
compare
between
IH
MC.
Significant
differences
observed
root
leaf
niches.
enriched
stress-tolerant
bacteria,
while
MC
showed
higher
levels
biofilm-forming
bacteria.
leaves,
even
more
pronounced,
particularly
abundance
Gram-negative
potential
pathogens,
PICRUSt2
predictions
revealed
nitrogen
metabolism
secondary
biosynthesis
pathways
different
cultivars
niches,
FAPROTAX
analysis
highlighted
variations
carbon,
nitrogen,
sulfur
cycling
functions.
These
findings
underscore
distinct
regulating
responses,
metabolic
processes
niches
cultivars,
providing
insights
for
improving
cultivation
practices
resilience.
Язык: Английский
Nutrient absorption and enzyme activity of Persian oak (Quercus brantii) seedlings under ectomycorrhizal fungi
BMC Plant Biology,
Год журнала:
2025,
Номер
25(1)
Опубликована: Май 31, 2025
This
study
aimed
to
investigate
the
influence
of
ectomycorrhizal
fungi
on
nutrient
uptake
and
activity
enzymes
alkaline
phosphatase
urease
under
pot
conditions.
In
experiment,
seedlings
Persian
oak
(Quercus
brantii)
were
inoculated
with
four
species
(Amanita
crocea,
Boletus
comptus,
Inocybe
rimosa,
Tricholoma
giganteum)
in
three
replicates.
After
seven
months
a
greenhouse
controlled
humidity,
various
parameters
examined,
including
leaf
dry
weight,
percentage
root
colonization,
concentration
(N,
P,
Ca,
Mg,
Zn,
Fe,
Cu),
enzyme
activity.
The
results
showed
that
all
types
contributed
an
increase
concentration,
N,
K,
Cu
compared
control
group.
treatments
also
differences
comptus
showing
highest
(87%).
particular,
rimosa
giganteum
significant
success
improving
phosphatase.
suggests
potential
these
fungi,
especially
giganteum,
can
be
utilized
for
establishment
support
regeneration
forests
affected
by
blight
disease.
Язык: Английский