Plant and Cell Physiology,
Journal Year:
2022,
Volume and Issue:
63(9), P. 1273 - 1284
Published: July 21, 2022
Although
most
cultivated
soils
have
high
levels
of
total
phosphorus
(P),
the
bioavailable
inorganic
P
(Pi)
are
insufficient.
The
application
plant-growth-promoting
rhizobacteria
(PGPR)
is
an
eco-friendly
strategy
for
utilization;
however,
PGPR-mediated
plant
responses
that
enhance
Pi
acquisition
remain
unexplored.
Here,
we
investigated
effect
Azospirillum
brasilense
on
Arabidopsis
adaptation
to
deficiency.
Results
showed
A.
inoculation
alleviated
Pi-deficiency-induced
growth
inhibition
and
anthocyanin
accumulation
increased
content
in
plants.
A
comprehensive
analysis
root
morphology
revealed
hair
density
length
under
Pi-limited
conditions.
We
further
demonstrated
enhanced
acid
phosphatase
activity
upregulated
expression
several
transporter
genes,
such
as
PHOSPHATE1
(PHO1),
PHOSPHATE
TRANSPORTER
1:(PHT1:1)
PHT1;4.
However,
did
not
o
pht1;1,
pht1;4
pht1;1pht1;4
mutants.
Moreover,
could
increase
PHT1;1
hairless
mutant
rsl4rsl2,
because
occurrence
low-Pi-induced
PHT1;4
hairs.
These
results
indicate
can
promote
development
levels,
consequently
improving
absorption
capacity
conferring
tolerance
Life,
Journal Year:
2024,
Volume and Issue:
14(10), P. 1320 - 1320
Published: Oct. 17, 2024
Forest
cover
is
deteriorating
rapidly
due
to
anthropogenic
causes,
making
its
restoration
urgent.
Plant
growth-promoting
bacteria
(PGPB)
could
offer
a
viable
solution
ensure
successful
reforestation
efforts.
This
study
aimed
select
bacterial
strains
with
mechanisms
that
promote
plant
growth
and
enhance
seedling
development.
The
used
in
this
were
isolated
from
the
rhizosphere
endophyte
regions
of
Journal of Agricultural and Food Chemistry,
Journal Year:
2024,
Volume and Issue:
72(43), P. 23776 - 23789
Published: Oct. 17, 2024
Plant
growth-promoting
rhizobacteria
(PGPR)
can
promote
lateral
root
formation,
while
the
underlying
mechanisms
are
not
fully
understood.
Here,
we
found
that
Pseudomonas
chlororaphis
subsp.
aurantiaca
inoculation
enhanced
auxin
accumulation
in
primordia
(LRP).
Upon
reaching
LRPs,
activated
AUXIN
RESPONSE
FACTOR
7
and
19
(ARF7/19)
promoted
formation
Arabidopsis.
Moreover,
reactive
oxygen
species
(ROS)
is
required
for
auxin-dependent
emergence,
P.
upregulated
expression
of
RESPIRATORY
BURST
OXIDASE
D
F
(RBOHD/F),
leading
to
ROS
LRP.
Although
scavenging
or
rbohd/f
mutants
exhibited
decreased
roots
after
inoculation,
bacteria-triggered
signals
were
altered.
Conversely,
application
defective
signaling
disturbed
chlororaphis-derived
roots.
Collectively,
these
results
suggest
ARF7/19-dependent
activates
RBOHD/F
produce
ROS,
coordinately
facilitating
development
treatment.
Plant and Cell Physiology,
Journal Year:
2022,
Volume and Issue:
63(9), P. 1273 - 1284
Published: July 21, 2022
Although
most
cultivated
soils
have
high
levels
of
total
phosphorus
(P),
the
bioavailable
inorganic
P
(Pi)
are
insufficient.
The
application
plant-growth-promoting
rhizobacteria
(PGPR)
is
an
eco-friendly
strategy
for
utilization;
however,
PGPR-mediated
plant
responses
that
enhance
Pi
acquisition
remain
unexplored.
Here,
we
investigated
effect
Azospirillum
brasilense
on
Arabidopsis
adaptation
to
deficiency.
Results
showed
A.
inoculation
alleviated
Pi-deficiency-induced
growth
inhibition
and
anthocyanin
accumulation
increased
content
in
plants.
A
comprehensive
analysis
root
morphology
revealed
hair
density
length
under
Pi-limited
conditions.
We
further
demonstrated
enhanced
acid
phosphatase
activity
upregulated
expression
several
transporter
genes,
such
as
PHOSPHATE1
(PHO1),
PHOSPHATE
TRANSPORTER
1:(PHT1:1)
PHT1;4.
However,
did
not
o
pht1;1,
pht1;4
pht1;1pht1;4
mutants.
Moreover,
could
increase
PHT1;1
hairless
mutant
rsl4rsl2,
because
occurrence
low-Pi-induced
PHT1;4
hairs.
These
results
indicate
can
promote
development
levels,
consequently
improving
absorption
capacity
conferring
tolerance
