Specific soil factors drive the differed stochastic assembly of rhizosphere and root endosphere fungal communities in pear trees across different habitats
Frontiers in Plant Science,
Journal Year:
2025,
Volume and Issue:
16
Published: April 1, 2025
Introduction
Pyrus
betulifolia
is
tolerant
to
diverse
environmental
conditions
and
commonly
planted
in
infertile
habitats
(such
as
beaches
ridges)
conserve
arable
land
for
cereal
crops.
Symbiotic
fungi
the
rhizosphere
root
endosphere
benefit
host
plants
by
enhancing
their
resilience
nutritional
deficiencies
under
stressful
conditions.
However,
mechanisms
underlying
assembly
of
these
symbiotic
fungal
communities
roots
P.
across
different
remain
poorly
understood.
Methods
30-year-old
were
selected
from
five
sites
northern
China
investigate
endosphere.
Soil
samples
collected
assess
heterogeneity
environment
surrounding
each
plant.
Procrustes
analysis,
variance
partitioning
ordination
regression
analysis
employed
explore
ecological
relationships
between
soil
factors
community
composition.
Results
The
exhibited
higher
richness,
greater
diversity
lower
structural
variability
compared
Additionally,
supported
a
network
with
abundance
stronger
connectivity
than
composition
varies
significantly
among
regions.
In
both
communities,
number
genera
specific
mountainous
regions
was
larger
those
plain
areas
saline-alkali
areas.
Null
model-based
analyses
indicated
that
mainly
governed
stochastic
processes.
Specifically,
non-saline-alkali
soils,
primarily
driven
dispersal
limitation,
whereas
dominated
drift.
influenced
Conclusion
root-associated
not
only
physicochemical
properties
but
also
compartment
niche
topography.
Moreover,
impact
intensity
alkaline
nitrogen
(AN)
phosphatase
(ALP),
while
more
strongly
affected
pH
sucrase
(SUC).
These
findings
could
provide
valuable
insights
design
beneficial
microbiomes
enhance
fruit
tree
performance.
Language: Английский
Morphological and Molecular Diversity of Phytoplankton in Beibu Gulf, Northern South China Sea
Ecology and Evolution,
Journal Year:
2025,
Volume and Issue:
15(4)
Published: April 1, 2025
ABSTRACT
The
Beibu
Gulf,
a
vital
region
for
marine
biodiversity
and
aquaculture,
is
increasingly
affected
by
nutrient‐driven
ecological
shifts
in
the
phytoplankton
community.
This
study
combined
morphology
eDNA
metabarcoding
(18S
rDNA
V4)
to
investigate
diversity
environmental
drivers
during
summer
winter
Gulf.
Metabarcoding
detected
3.5
times
more
species,
contributing
higher
species
richness
than
morphology.
identified
200
genera
from
eight
phyla,
while
only
49
six
phyla.
Both
methods
revealed
different
dominant
communities.
Bacillariophyta
Haptophyta
dominated
community
based
on
morphology,
winter,
respectively;
meanwhile,
Dinophyta
both
seasons
under
due
their
high
18S
copy
number.
Altogether,
83
HAB
and/or
toxic
were
identified,
among
which
10
dominant,
suggesting
risk
of
outbreaks
Phytoplankton
abundance
increased
south
north
west
east
seasons,
following
input
dissolved
inorganic
nitrogen
(DIN)
silicate.
Excess
ammonium
can
promote
dominance
Scrippsiella
trochoidea
Heterocapsa
circularisquama
,
positioning
them
as
emerging
excess
DIN
caused
extreme
phosphorus
limitation
favored
Phaeocystis
globosa
provided
comprehensive
description
influence
Language: Английский