Journal of Plant Growth Regulation,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Oct. 27, 2024
The
response
of
plants
to
changing
environmental
conditions
is
mediated
by
endogenous
phytohormones
which
concentration
and
activity
can
be
altered
the
exogenous
application
plant
growth
regulators
(PGRs).
present
study
was
conducted
investigate
effects
foliar
distilled
water
(ddH2O)
methyl
jasmonate
(MeJA—5
50
µM)
under
drought
stress
(15
5%
soil
content—SWC)
on
phytohormone
status
Impatiens
walleriana.
following
classes
were
analyzed
HPLC–MS:
abscisic
acid
(ABA)
its
metabolic
intermediates,
jasmonates,
salicylic
(SA),
cytokinins
(CKs),
auxin
indole-3-acetic
(IAA).
results
showed
that
leaves
sprayed
with
μM
MeJA
during
severe
(5%
SWC)
had
highest
concentrations
ABA
jasmonic
(JA).
In
addition,
treated
at
15%
SWC
a
significantly
increased
JA
content.
groups
ddH2O
µM
MeJA,
content
another
jasmonate,
acid-isoleucine
(JA-Ile),
SWC.
Interestingly,
did
not
induce
changes
in
I.
walleriana
leaves.
Similarly,
no
SA
or
CK
observed
any
groups.
On
other
hand,
an
increase
IAA
from
this
indicate
could
affect
phytohormonal
walleriana,
are
fundamental
overall
experience.
According
obtained
results,
jasmonates
changed
most
significantly,
indicating
possible
overlap
their
signaling
pathways,
as
well
interaction
phytohormones.
Horticulturae,
Journal Year:
2024,
Volume and Issue:
10(3), P. 259 - 259
Published: March 8, 2024
The
plant
water
status
is
crucial
for
growth
and
production,
but
the
current
climate
change
scenario
makes
it
challenging
to
match
demand.
Blueberries
are
an
economically
important
crop
play
acknowledged
role
in
human
health
due
their
antioxidant
compounds.
This
research
aimed
determine
whether
exogenous
application
of
methyl
jasmonate
(MeJA)
improves
defense
mechanisms
protecting
photosynthetic
performance
blueberry
cultivar
‘Brigitta’
under
stress
condition
a
deficit
(WD).
A
greenhouse
experiment
was
carried
out
16-h
light
period,
at
20
°C,
60–80%
relative
humidity
two
weeks
before
MeJA
plants
(Vaccinium
corymbosum,
‘Brigitta’).
following
treatments
were
maintained
7-days:
(i)
80%
field
capacity
(NoWD),
(ii)
plus
(NoWD
+
MeJA),
(iii)
20%
(WD),
(iv)
(WD
MeJA).
sprayed
as
aqueous
solution
10
µM
over
plant’s
foliar
system.
At
end
assay,
leaves
analyzed
content,
specific
leaf
area,
lipid
peroxidation,
total
activity,
phenols,
anthocyanins,
anthocyanidin
compounds,
performance.
showed
significant
decrease
oxidative
levels,
with
increase
phenolic
delphinidin,
petunidin,
antheraxanthin,
zeaxanthin,
improvement
parameters.
shown
be
susceptible
WD,
which
mainly
decreased
photosynthesis.
However,
induced
metabolic
changes
through
strategy
within
counteract
negative
effects
WD
protect
apparatus,
allowed
withstand
period
WD.
BMC Plant Biology,
Journal Year:
2025,
Volume and Issue:
25(1)
Published: Feb. 1, 2025
The
indiscriminate
use
of
pesticides
compromises
physiology
and
metabolism
in
crops,
posing
health
risks
through
residue
accumulation
edible
tissues.
Amaranthus
hybridus
L.,
a
fast
growing,
nutritionally
medicinally
valuable
crop
was
studied
here
to
assess
the
impact
cypermethrin
(CYP)
at
recommended
(R1,
100
ppm)
double
dose
(R2,
200
alongside
foliar
application
jasmonic
acid
(JA)
50
µM,
µM
concentrations.
CYP
R1
induced
hormesis,
while
R2
toxic,
elevating
production
ROS
molecules
(H2O2,
SOR,
MDA).
JA
upregulated
antioxidant
activity
SOD,
POD,
APX,
GST,
DHAR,
GSH,
proline
alleviate
oxidative
stress
improve
growth
indicators,
including
shoot
length,
leaf
area,
chlorophyll
content,
Fv/Fm
ratio,
biomass.
yielded
highest
increase
biomass,
11.52%
13.7%
for
treated
plants,
respectively
also
led
reduced
residues.
UHPLC-MS
analysis
tissue
revealed
contents
carotenoids,
flavonoids,
phenolics,
phenylpropanoids,
steroids
content
plant
group
combinedly
with
compared
those
alone,
indicating
protective
growth-promoting
role
under
pesticide
conditions.
Overall,
concentration
proved
be
effective
against
by
either
study.
These
insights
could
offer
strategies
reduce
pesticide-induced
damage
vegetable
advancing
sustainable
agriculture.
Horticulturae,
Journal Year:
2025,
Volume and Issue:
11(2), P. 164 - 164
Published: Feb. 4, 2025
The
present
study
scrutinized
the
influence
of
foliar
application
methyl
jasmonate
on
physiochemical
characteristics
and
antioxidant
enzymes
two
grapevine
rootstocks,
‘SO4’
(high
drought
tolerance)
‘101-14’
(low
tolerance),
under
conditions.
seedlings
were
sprayed
with
at
100
µM
3-day
intervals
throughout
28-day
stress
period.
results
showed
that
treating
both
rootstocks
greatly
minimized
adverse
effects
reactive
oxygen
species
caused
by
drought.
Specifically,
substantially
reduced
levels
malondialdehyde,
hydrogen
peroxide,
ion
leakage
while
increasing
photosynthetic
pigment
levels,
soluble
carbohydrates,
proline,
protein,
total
phenols
content.
Additionally,
applying
improved
action
like
superoxide
dismutase,
ascorbate
peroxidase,
catalase.
This
made
membranes
leaves
more
solid
during
Methyl
treatment
oxidative
damage
mineral
element
(P,
K,
Mg,
Ca,
Fe,
Zn)
accumulation
in
green
treated
plants
as
opposed
to
drought-untreated
plants.
These
noticeable
compared
rootstocks.
Based
these
results,
grapevines
may
be
considered
a
novel
strategy
for
mitigating
water
scarcity
production
system.
Horticulturae,
Journal Year:
2024,
Volume and Issue:
10(6), P. 562 - 562
Published: May 27, 2024
Aquatic
plants,
just
like
terrestrial
are
exposed
to
oxidative
stress.
However,
their
responses
still
under-researched.
In
this
study,
we
examined
the
physiological
and
antioxidative
of
an
aquatic
plant,
duckweed
(Lemna
minor
L.),
four
indole-3-acetic
acid
(IAA)-degrading
-producing
Pseudomonas
bacteria
(Pseudomonas
oryzihabitans
D1-104/3,
P.
putida
A3-104/5,
gessardii
C31-106/3
yamanorum
C44-104/1)
and/or
a
supraphysiological
level
IAA
(10
mg
L−1).
Growth
characteristics,
total
photosynthetic
pigment
content,
histochemical
localization
reactive
oxygen
species
antioxidant
enzyme
activity
(SOD,
CAT
POX)
were
evaluated
at
two
time
points,
after
3
7
days
co-cultivation.
Superoxide
anion
hydrogen
peroxide
produced
accumulated
mainly
in
roots,
daughter
fronds
veins
duckweeds.
Duckweeds’
depended
on
strain
Pseudomonas,
exogenous
IAA.
Co-cultivation
with
has
positive
or
neutral
effects.
Exogenous
application
had
negative
effect
other
parameters.
showed
plant-growth-promoting
effects
duckweed:
increased
biomass
production,
modulation
duckweeds’
enzymatic
reduction
content.
This
study
widens
our
knowledge
plants
response
stress,
supports
hypothesis
that
plant
growth-promoting
(PGPB)
induce
tolerable
levels
stress
introduces
new
PGPB
strain,
C31-106/3.
