Impact of Karst Rocky Desertification on N-Fixing Tree Species Root System and Bacteria
Forests,
Год журнала:
2025,
Номер
16(3), С. 425 - 425
Опубликована: Фев. 26, 2025
The
study
aimed
to
investigate
the
effect
of
soil
textural
or
mineral
fraction
substrates
(loam
and
gravel)
from
karst
desertification
areas
on
rhizospheric
root-associated
bacterial
community
structure
Dalbergia
odorifera
(an
N-fixing
tree),
using
high-throughput
sequencing
techniques,
based
treatment
methods
whole-root
two-chambered
split-root
systems.
Further,
this
determined
relative
importance
plant
substrate
properties
rhizospheric,
non-rhizospheric
endospheric
bacteria
composition.
type
exerts
a
significant
influence
both
communities,
whereas
endophytic
communities
within
root
system
are
predominantly
by
species
rather
than
type.
analysis
revealed
that
diversity
was
considerably
lower
communities.
Cluster
indicated
samples
formed
distinct
cluster,
while
in
grouped
into
one
branch,
those
gravel
another
branch.
In
comparison
treatments,
reduced
abundance
observed
rhizosphere
non-rhizosphere
nitrogen-fixing
plants
soil,
potentially
due
interplay
nutrient
availability
increased
porosity
treatments.
Proteobacteria,
which
involved
nitrogen
cycle,
exhibited
highest
abundance.
contrast,
Acidobacteria,
Firmicutes
other
phyla
cycling
demonstrated
higher
abundance,
with
their
presence
being
more
pronounced
extreme
environments,
such
as
compared
substrates.
These
results
suggest
can
respond
environments
increasing
findings
provide
theoretical
basis
for
use
D.
ecosystem
recovery
vegetation
restoration.
Язык: Английский
Pseudomonas Species Isolated From Lotus Nodules Are Genetically Diverse and Promote Plant Growth
Environmental Microbiology,
Год журнала:
2025,
Номер
27(3)
Опубликована: Фев. 27, 2025
ABSTRACT
Nodules
harbour
microbial
communities
composed
of
rhizobia
and
other
lower‐abundance
bacteria.
These
non‐rhizobial
bacteria
can
promote
plant
growth.
However,
their
genomic
diversity
how
this
relates
to
growth‐promoting
traits
remain
poorly
investigated.
Here,
we
isolated
14
Pseudomonas
strains
from
the
nodules
Lotus
plants,
sequenced
genomes,
analysed
phylogenetic
diversity,
assessed
ability
We
identified
five
distinct
species,
including
a
novel
species
named
monachiensis
sp.
nov.,
with
strain
PLb12A
T
,
as
type
strain.
Genome
analysis
these
nodule‐isolated
revealed
an
abundance
genes
associated
traits,
especially
auxin‐related
genes,
compared
closely
related
strains.
In
accordance,
most
enhanced
shoot
growth
burttii
while
only
some
promoted
root
or
early
onset
hair
proliferation.
none
significantly
affected
form
nodules.
Overall,
our
findings
highlight
genotypic
potential
underscore
possible
applications
in
mixed
inocula
rhizobia.
Язык: Английский