Frontiers in Microbiology,
Год журнала:
2025,
Номер
16
Опубликована: Май 14, 2025
Salinity
is
a
significant
abiotic
stress
that
affects
the
growth,
physiology,
and
yield
of
crop
plants
across
globe.
Sustainable
measures
to
mitigate
saline
soil
prevent
losses
require
immediate
attention.
The
present
study
aimed
determine
impacts
hydrogel,
biochar,
biofertilizer
on
alfalfa
growth
physiological
properties
under
salt
stress.
experiment
was
performed
in
randomized
block
design
with
three
replications
dried
bottom
Aral
Sea,
consisting
control
(T1),
hydrogel
alone
(T2),
biochar
(T3),
(T4).
Plant
parameters,
root
morphological
traits,
were
analyzed
after
60
days
sowing.
results
showed
improvement
shoot
length,
dry
weight,
weight
(T3)
(T4)
treated
compared
(T1)
(T2).
However,
application
exhibited
more
pronounced
effects
other
treatments.
Biochar
treatment
resulted
highest
chlorophyll
total
contents
Soil
amendments
promote
help
adverse
impact
Frontiers in Microbiology,
Год журнала:
2023,
Номер
14
Опубликована: Сен. 27, 2023
The
present
crisis
at
hand
revolves
around
the
need
to
enhance
plant
resilience
various
environmental
stresses,
including
abiotic
and
biotic
ensure
sustainable
agriculture
mitigate
impact
of
climate
change
on
crop
production.
One
such
promising
approach
is
utilization
growth-promoting
rhizobacteria
(PGPR)
mediate
these
stresses.
Plants
are
constantly
exposed
stress
factors,
as
drought,
salinity,
pathogens,
nutrient
deficiencies,
which
can
significantly
reduce
yield
quality.
PGPR
beneficial
microbes
that
reside
in
rhizosphere
plants
have
been
shown
positively
influence
growth
tolerance
through
mechanisms,
solubilization,
phytohormone
production,
induction
systemic
resistance.
review
comprehensively
examines
mechanisms
promotes
resilience,
acquisition,
hormonal
regulation,
defense
induction,
focusing
recent
research
findings.
advancements
made
field
PGPR-mediated
multi-omics
approaches
(
viz.
,
genomics,
transcriptomics,
proteomics,
metabolomics)
unravel
intricate
interactions
between
discussed
their
molecular
pathways
involved
tolerance.
Besides,
also
emphasizes
importance
continued
implementation
PGPR-based
strategies
address
pressing
challenges
facing
global
food
security
commercialization
bio-formulations
for
agricultural.
Agronomy,
Год журнала:
2022,
Номер
12(10), С. 2266 - 2266
Опубликована: Сен. 22, 2022
Worldwide
crop
productivity
hampers
severely
due
to
the
adverse
effects
of
salinity.
Global
warming
causes
a
rapid
escalation
salt-affected
area,
and
new
agricultural
land
is
affected
through
saltwater
intrusion.
The
ever-growing
human
population
impulses
utilize
saline
area
for
cultivation
ensure
food
security.
Salinity
resistance
crops
could
be
promising
substitute
but
with
minor
success
because
inappropriate
tactics
on
soil
management
resulted
in
unsatisfactory
yield.
Salt-tolerant
plant
growth-promoting
rhizobacteria
(ST-PGPR)
considered
an
alternate
way
towards
enhancing
growth
ecosystems.
It
reported
that
PGPR
enabled
produce
exopolysaccharides
which
lead
biofilm
formation
generate
osmoprotectants
antioxidant
enzymes
can
significantly
contribute
stimulating
ecosystem.
In
addition,
several
characteristics
such
as
acquisition
essential
nutrients
upsurge
hormone
production
enhance
simultaneously.
this
review,
we
will
explore
survival
mechanisms
ST-PGPR
their
influence
promotion
Frontiers in Plant Science,
Год журнала:
2023,
Номер
13
Опубликована: Фев. 9, 2023
Plant
growth-promoting
bacteria
(PGPB)
represent
an
eco-friendly
alternative
to
reduce
the
use
of
chemical
products
while
increasing
productivity
economically
important
crops.
The
emission
small
gaseous
signaling
molecules
from
PGPB
named
volatile
organic
compounds
(VOCs)
has
emerged
as
a
promising
biotechnological
tool
promote
biomass
accumulation
in
model
plants
(especially
Arabidopsis
thaliana)
and
few
crops,
such
tomato,
lettuce,
cucumber.
Rice
(Oryza
sativa)
is
most
essential
food
crop
for
more
than
half
world's
population.
However,
VOCs
improve
this
performance
not
yet
been
investigated.
Here,
we
evaluated
composition
effects
bacterial
on
growth
metabolism
rice.
First,
selected
isolates
(IAT
P4F9
E.1b)
that
increased
rice
dry
shoot
by
up
83%
co-cultivation
assays
performed
with
different
durations
time
(7
12
days).
Metabolic
profiles
co-cultivated
these
controls
(without
non-promoter
bacteria-1003-S-C1)
were
investigated
via1H
nuclear
magnetic
resonance.
analysis
identified
metabolites
(e.g.,
amino
acids,
sugars,
others)
differential
abundance
between
treatments
might
play
role
metabolic
pathways,
protein
synthesis,
signaling,
photosynthesis,
energy
metabolism,
nitrogen
assimilation,
involved
promotion.
Interestingly,
IAT
displayed
consistent
promotion
activity
also
able
increase
vivo.
Molecular
identification
sequencing
16S
rRNA
gene
E.1b
showed
higher
identity
Serratia
Achromobacter
species,
respectively.
Lastly,
volatilomes
two
other
(1003-S-C1
Escherichia
coli
DH5α)
through
headspace
solid-phase
microextraction
coupled
gas
chromatography-mass
spectrometry.
Compounds
belonging
classes,
benzenoids,
ketones,
alcohols,
sulfide,
alkanes,
pyrazines,
identified.
One
VOCs,
nonan-2-one,
was
validated
vitro
bioactive
compound
capable
promoting
growth.
Although
further
analyses
are
necessary
properly
elucidate
molecular
mechanisms,
our
results
suggest
potential
candidates
sources
bioproducts,
contributing
sustainable
agriculture.
Frontiers in Plant Science,
Год журнала:
2023,
Номер
14
Опубликована: Янв. 23, 2023
Climate
change
augments
the
risk
to
food
security
by
inducing
drought
stress
and
a
drastic
decline
in
global
rice
production.
Plant
growth-promoting
bacteria
(PGPB)
have
been
known
improve
plant
growth
under
stress.
Here
present
study,
we
isolated,
identified,
well-characterized
eight
drought-tolerant
from
rhizosphere
that
are
tolerant
20%
PEG-8000.
These
strains
exhibited
multiple
traits,
i.e.,
1-aminocyclopropane-1-carboxylic
acid
(ACC)
deaminase
activity,
exopolysaccharide
production,
phosphate
(P)-solubilizing
activity
(51–356
µg
ml
-1
),
indole-3
acetic
(IAA)
production
(14.3–46.2
of
organic
acids
(72–178
).
Inoculation
bacterial
consortium
(
Bacillus
subtilis
NM-2,
Brucella
haematophilum
NM-4,
cereus
NM-6)
significantly
improved
seedling
vigor
index
(1009.2-1100)
as
compared
non-inoculated
stressed
plants
(630-957).
Through
rhizoscanning,
efficiency
was
validated
root
parameters
such
length
(17%),
diameter,
surface
area
(18%)
all
tested
genotypes
with
respective
treatments.
Furthermore,
response
inoculation
on
three
positively
correlated
ameliorating
traits
accumulation
osmoprotectant,
proline
(85.8%–122%),
relative
water
content
(51%),
membrane
stability
(64%),
antioxidant
enzymes
reduce
oxidative
damage
reactive
oxygen
species.
A
decrease
temperature
chlorophyll
inoculated
were
found
using
infrared
thermal
imaging
soil
analyzer
development
(SPAD),
respectively.
The
key
supporting
role
toward
responses
robust
techniques
like
an
gas
analyzer.
principal
component
analysis
depicts
contribution
yield
integration
genotype
(NIBGE-DT02)
potential
strains,
NM-6,
can
serve
effective
bioinoculant
cope
scarcity
current
alarming
issues
related
fluctuating
climate.
Frontiers in Plant Science,
Год журнала:
2023,
Номер
14
Опубликована: Апрель 20, 2023
Halotolerant
plant
growth
promoting
rhizobacteria
(PGPR)
are
beneficial
microorganisms
utilized
to
mitigate
the
biotic
and
abiotic
stresses
in
plants.
The
areas
of
Sundarban
mangroves
West
Bengal,
India
have
been
reported
be
rich
halotolerant
microflora,
yet
major
area
remains
unexplored.
present
study,
therefore,
aims
map
down
region-specific
native
microbial
community
potent
salt
tolerance,
(PGP)
activity
antagonistic
against
fungal
pathogens.
Bacterial
samples
were
isolated
from
saline
soil
mangroves.
A
total
156
bacterial
20
screened
for
their
tolerance
potential.
These
isolates
characterised
using
morphological,
biochemical,
molecular
approaches.
Based
on
16s
rRNA
sequencing,
they
classified
into
4
different
genera,
including
Arthrobacter
sp.
(01
isolate),
Pseudomonas
plecoglossicida
Kocuria
rosea
Bacillus
(17
isolates).
which
possessed
traits
phosphate,
zinc
solubilization,
indole
acetic
acid
production,
siderophore,
ammonia
generation
selected.
Further,
effect
two
GN-5
JR-12
showed
most
prominent
PGP
activities
was
evaluated
pea
under
high
salinity
conditions.
improved
survival
by
germination
(36
43%)
root-shoot
weight
comparison
non-inoculated
control
In
a
subsequent
dual
culture
confrontation
experiment,
both
these
halo-tolerant
aggressive
root
rot
disease-causing
Macrophomina
phaseolina
(Tassi)
Goid
NAIMCC-F-02902.
identified
could
used
as
potential
bioagents
soils,
with
disease.
However,
further
studies
at
physiological
level
would
help
delineate
detail
mechanistic
understanding
broad-spectrum
defence
pathogen.
Frontiers in Plant Science,
Год журнала:
2024,
Номер
15
Опубликована: Июнь 13, 2024
Introduction
The
ongoing
global
expansion
of
salt-affected
land
is
a
significant
factor,
limiting
the
growth
and
yield
crops,
particularly
rice
(
Oryza
sativa
L).
This
experiment
explores
mitigation
salt-induced
damage
in
(cv
BRRI
dhan100)
following
application
plant
growth-promoting
rhizobacteria
(PGPR).
Methods
Rice
seedlings,
at
five-
six-weeks
post-transplanting,
were
subjected
to
salt
stress
treatments
using
50
100
mM
NaCl
seven-day
intervals.
Bacterial
cultures
consisting
endophytic
PGPR
Bacillus
subtilis
B.
aryabhattai
)
an
epiphytic
administered
three
critical
stages:
transplantation
42-day-old
vegetative
stage
five
weeks
post-transplantation,
panicle
initiation
seven
post-transplantation.
Results
Salt
induced
osmotic
stress,
ionic
imbalances,
oxidative
plants,
with
consequent
negative
effects
on
growth,
decrease
photosynthetic
efficiency,
changes
hormonal
regulation,
along
increased
methylglyoxal
(MG)
toxicity.
treatment
alleviated
salinity
by
improving
antioxidant
defenses,
restoring
equilibrium,
enhancing
water
balance,
increasing
nutrient
uptake,
attributes,
bolstering
hormone
synthesis,
MG
detoxification.
Discussion
These
findings
highlight
potential
bolster
physiological
biochemical
functionality
serving
as
effective
buffer
against
stress–induced
damage.
showed
greatest
benefits,
while
both
had
commendable
mitigating
plants.
Plant Stress,
Год журнала:
2024,
Номер
11, С. 100371 - 100371
Опубликована: Янв. 24, 2024
Bacterial
pathogens
have
been
of
considerable
interest
in
the
field
plant
pathology
as
they
are
known
to
cause
serious
constraints
crop
production
once
infected.
When
environmental
conditions
favor
disease
development,
well-known
bacterial
including
Pseudomonas
syringae,
Ralstonia
spp.,
and
Xanthomonas
spp.
exert
severe
harmful
impacts
across
a
variety
plants.
The
infect
tissues'
extracellular
spaces
release
virulence
factors
directly
into
cytosol
or
apoplast
host
plant.
In
this
context,
developing
long-lasting
effective
methods
for
controlling
infections
becomes
essential
maintaining
sustainable
agricultural
production.
However,
conventional
such
copper-based
bactericides
antibiotics
often
proven
be
ineffective
also
adversely
affect
human
health
environment.
Therefore,
immense
challenges
offered
by
diseases
global
agriculture
encouraged
environment-friendly
alternatives
chemical
pesticides.
Abiotic
elicitors
chemicals
with
non-biological
origins
that
activate
defense
mechanisms
can
potentially
help
protection.
Numerous
abiotic
shown
impressive
effectiveness
boosting
defenses
against
infections,
employing
multiple
induced
resistance
various
crops.
present
review
explores
rapidly
discusses
their
role
strengthening
through
induction
resistance,
understanding
immunity,
highlighting
both
potential
benefits
current
strengthen
food
security.
Plants,
Год журнала:
2022,
Номер
11(23), С. 3316 - 3316
Опубликована: Дек. 1, 2022
The
genus
Streptomyces
is
the
most
abundant
and
essential
microbes
in
soil
microbial
community.
are
familiar
have
great
potential
to
produce
a
large
variety
of
bioactive
compounds.
This
considers
an
efficient
biofertilizer
based
on
its
plant
growth-promoting
activities.
Based
their
ability
wide
varieties
molecules,
present
study
aimed
explore
growth
promotion
four
strains
role
enhancing
cucumber
yield
under
greenhouse
conditions.
sp.
strain
HM2,
thinghirensis
HM3,
HM8,
tricolor
HM10
were
chosen
for
current
study.
Plant
(PGP)
features,
i.e.,
indole
acetic
acid
(IAA)
production,
siderophore
excretion,
solubilizing
phosphate,
evaluated
vitro.
All
produced
IAA,
siderophore,
immobilized
inorganic
phosphate.
Following
4
days
incubation
at
30
°C,
copious
amounts
IAA
(18,
22,
62,
146
µg/mL,
respectively)
siderophores
(42.59,
40.01,
16.84,
64.14%
SU,
respectively).
At
same
time,
P
solubilization
efficacy
scored
64.3%,
84.4%,
57.2%,
81.6%
with
frequency.
During
planta
evaluation,
selected
combined
rock
phosphate
assessed
as
biofertilizers
plants.
Under
all
treatments,
positive
significant
differences
studied
traits
manifested
except
dry
stem
matter
(SDM),
net
assimilation
rate
(NAR),
relative
(RGR),
fruit
firmness
(FF).
Treatment
T4
(rock
+
HM3)
followed
by
T5
HM8)
revealed
best
results
height
(PH),
number
leaves
per
(NLPP),
root
length
(RL),
fruits
(NFPP),
(FL),
diameter
(FD),
fresh
weight
(FFWPP),
(SP)
after
21
DAT,
end
experiment.
Notably,
T6
HM10)
caused
considerable
increase
leaf
area
(LA).
bacteria
enhance
through
phosphorus
solubilizing,
improve
nutrient
availability,
phytohormones,
support
abiotic
stress.
These
features
important
sustainable
agriculture
reducing
environmental
pollution
chemical
fertilizers
pesticides.
Scientific Reports,
Год журнала:
2023,
Номер
13(1)
Опубликована: Май 6, 2023
Salinity
stress
is
the
second
most
devastating
abiotic
factor
limiting
plant
growth
and
yields.
Climate
changes
have
significantly
increased
salinity
levels
of
soil.
Besides
improving
physiological
responses
under
conditions,
jasmonates
modulate
Mycorrhiza-Plant
relationships.
The
present
study
aimed
to
evaluate
effects
methyl
jasmonate
(MeJ)
Funneliformis
mosseae
(Arbuscular
mycorrhizal
(AM)
on
morphology
antioxidant
mechanisms
in
Crocus
sativus
L.
stress.
After
inoculation
with
AM,
pre-treated
C.
corms
MeJ
were
grown
low,
moderate,
severe
Intense
damaged
corm,
root,
total
leaf
dry
weight,
area.
Salinities
up
50
mM
Proline
content
Polyphenol
oxidase
(PPO)
activity,
but
this
trend
proline.
Generally,
anthocyanins,
soluble
sugars,
PPO.
Total
chlorophyll
superoxide
dismutase
(SOD)
activity
by
salinity.
maximum
catalase
SOD
activities
+
AM
125
mM,
respectively,
-MeJ
treatment
was
75
mM.
Although
20
growth,
using
mycorrhiza
enhanced
trend.
Moreover,
these
treatments
reduced
damage
100
Using
can
improve
saffron
various
ranges
levels;
however,
like
120
phytohormone
F.
could
be
adverse.