Frontiers in Environmental Science,
Journal Year:
2022,
Volume and Issue:
10
Published: Nov. 24, 2022
Plant
responses
to
abiotic
stresses
through
diverse
mechanisms
and
strategic
measures
in
utilizing
nanomaterials
have
positively
impacted
crop
productivity.
Stress
can
cause
membrane
depletion,
reactive
oxygen
species
formation,
cell
toxicity
death,
reduction
plant
growth.
However,
mitigate
some
of
the
negative
impacts
enhance
yield.
Some
endophytic
microbes
synthesize
nanomaterials,
which
maintain
health
growth
via
nitrogen
fixation,
siderophore
production,
phytohormones
synthesis,
enzyme
production
without
any
pathological
effects.
Nanoparticle-synthesizing
endophytes
also
help
boost
biochemical
physiological
functions
by
ameliorating
impact
stresses.
The
increase
use
implementation
nano-growth
enhancers
from
beneficial
microbes,
such
as
nano-biofertilizers,
nano-pesticides,
nano-herbicides,
nano-fungicides
are
considered
safe
eco-friendly
ensuring
sustainable
agriculture
agrochemical
usage.
Promisingly,
nanotechnology
concepts
aim
sustain
protect
plants
oxidative
activation
anti-oxidative
enzymes.
relieve
stress
still
require
further
discussion
literature.
Therefore,
this
review
is
focused
on
induction
tolerance
plants,
Frontiers in Microbiology,
Journal Year:
2023,
Volume and Issue:
14
Published: April 27, 2023
Growth
and
productivity
of
crop
plants
worldwide
are
often
adversely
affected
by
anthropogenic
natural
stresses.
Both
biotic
abiotic
stresses
may
impact
future
food
security
sustainability;
global
climate
change
will
only
exacerbate
the
threat.
Nearly
all
induce
ethylene
production
in
plants,
which
is
detrimental
to
their
growth
survival
when
present
at
higher
concentrations.
Consequently,
management
becoming
an
attractive
option
for
countering
stress
hormone
its
effect
on
yield
productivity.
In
ACC
(1-aminocyclopropane-1-carboxylate)
serves
as
a
precursor
production.
Soil
microorganisms
root-associated
plant
promoting
rhizobacteria
(PGPR)
that
possess
deaminase
activity
regulate
development
under
harsh
environmental
conditions
limiting
levels
plants;
this
enzyme
is,
therefore,
designated
“stress
modulator.”
TheACC
enzyme,
encoded
AcdS
gene,
tightly
controlled
regulated
depending
upon
conditions.
Gene
regulatory
components
made
up
LRP
protein-coding
gene
other
activated
via
distinct
mechanisms
aerobic
anaerobic
deaminase-positive
PGPR
strains
can
intensively
promote
crops
being
cultivated
including
salt
stress,
water
deficit,
waterlogging,
temperature
extremes,
presence
heavy
metals,
pesticides
organic
contaminants.
Strategies
combating
improving
introducing
acdS
into
bacteria,
have
been
investigated.
recent
past,
some
rapid
methods
cutting-edge
technologies
based
molecular
biotechnology
omics
approaches
involving
proteomics,
transcriptomics,
metagenomics,
next
generation
sequencing
(NGS)
proposed
reveal
variety
potential
deaminase-producing
thrive
external
Multiple
stress-tolerant
demonstrated
great
promise
providing
resistance/tolerance
various
stressors
and,
it
could
be
advantageous
over
soil/plant
microbiome
flourish
stressed
environments.
Scientific Reports,
Journal Year:
2023,
Volume and Issue:
13(1)
Published: March 18, 2023
Abstract
Industrialization
and
human
urbanization
have
led
to
an
increase
in
heavy
metal
(HM)
pollution
which
often
cause
negative/toxic
effect
on
agricultural
crops.
The
soil-HMs
cannot
be
degraded
biologically
however,
microbe-mediated
detoxification
of
toxic
HMs
into
lesser
forms
are
reported.
Considering
the
potentiality
HMs-tolerant
soil
microbes
detoxification,
Pseudomonas
fluorescence
PGPR-7
Trichoderma
sp.
T-4
were
recovered
from
HM-affected
areas.
Under
both
normal
cadmium
stress,
ability
microorganisms
produce
different
plant
hormones
active
enzymes
was
examined.
Strains
tolerated
(Cd)
up-to
1800
2000
µg
mL
−1
,
respectively,
produced
various
growth
regulating
substances
(IAA,
siderophore,
ACC
deaminase
ammonia
HCN)
Cd-stressed
condition.
promoting
detoxifying
strains
evaluated
(either
singly/combined)
by
applying
them
chickpea
(
Cicer
arietinum
L.)
plants
endogenously
contaminated
with
Cd
levels
(0–400
kg
soils).
higher
concentration
(400
soils)
negatively
influenced
parameters
which,
improved
following
single/combined
inoculation
P
.
T-4.
Both
microbial
increased
Cd-treated
chickpeas
their
combined
(PGPR-7
+
T-4)
caused
most
positive
effect.
For
instance,
25
Kg
T4
treatment
maximum
germination
percentage
(10%),
root
dry
biomass
(71.4%)
vigour
index
(33%),
chl-a
(38%),
chl-b
(41%)
carotenoid
content
(52%).
Furthermore,
P.
maximally
decreased
proline,
MDA
content,
POD
CAT
activities
50%,
43%
62%,
respectively
application
soils-treated
chickpea.
Additionally,
lowered
uptake
Cd.
example,
Cd-uptake
tissues
42
34%
when
-
treated
inoculated
PGPR-7,
co-inoculation
T4)
strains,
respectively.
Therefore,
current
observation,
it
is
suggested
that
dual
tolerant
may
potentially
used
reclamation
metal-contaminated
soils.
Microorganisms,
Journal Year:
2023,
Volume and Issue:
11(4), P. 973 - 973
Published: April 8, 2023
Endophytic
fungi
and
bacteria
were
isolated
from
finger
millet
their
effects
on
growth
parameters
zinc
NPK
contents
in
grains
studied.
Out
of
70
fungal
112
bacterial
endophytes,
the
two
best
isolates
selected
basis
solubilization
plant-growth-promoting
attributes.
The
identified
Aspergillus
terreus
Lecanicillium
sp.,
Pseudomonas
bijieensis
Priestia
megaterium.
endophytic
zinc,
mobilization,
efficacy
determined
a
pot
experiment
with
carbonate
as
source.
Endophytic-primed
plants
showed
enhanced
shoot
root
lengths
compared
to
unprimed
control.
Endophytes
increased
content
by
between
12.12%
18.80%
control
plants.
also
augmented
concentrations
seeds
exhibited
stability
diverse
range
pHs,
temperatures,
NaCl
concentrations,
various
carbohydrate
nitrogen
sources.
This
is
first
study
reporting
interaction
terreus,
bijieensis,
megaterium
for
grain
Zn
biofortification
concentration
enhancement.
indicated
that
zinc-dissolving
endophytes
possess
potential
enhancing
addition
