Melatonin Alleviates Photosynthetic Injury in Tomato Seedlings Subjected to Salt Stress via OJIP Chlorophyll Fluorescence Kinetics
Plants,
Год журнала:
2025,
Номер
14(5), С. 824 - 824
Опубликована: Март 6, 2025
The
tomato
is
among
the
crops
with
most
extensive
cultivated
area
and
greatest
consumption
in
our
nation;
nonetheless,
secondary
salinization
of
facility
soil
significantly
hinders
sustainable
growth
agriculture.
Melatonin
(MT),
as
an
innovative
plant
regulator,
essential
stress
responses.
This
research
used
a
hydroponic
setup
to
replicate
saline
conditions.
Different
endogenous
levels
melatonin
(MT)
were
established
by
foliar
spraying
100
μmol·L−1
MT,
MT
synthesis
inhibitor
p-CPA
(100
μmol·L−1),
combination
investigate
mechanism
which
mitigates
effects
salt
on
photosynthetic
efficiency
seedlings.
Results
indicated
that
after
six
days
stress,
content
seedlings
drastically
decreased,
declines
net
rate
photosystem
performance
indices
(PItotal
PIabs).
OJIP
fluorescence
curve
exhibited
distortion,
characterized
anomalous
K-band
L-band
manifestations.
Exogenous
dramatically
enhanced
gene
(TrpDC,
T5H,
SNAcT,
AcSNMT)
expression
critical
enzymes
synthesis,
therefore
boosting
level
MT.
application
parameters.
treatment
decreased
intensities
J-phase
I-phase
under
attenuated
irregularities
performance,
concurrently
quantum
yield
energy
partitioning
ratios.
It
specifically
elevated
φPo,
φEo,
ψo,
while
decreasing
φDo.
therapy
parameters
both
membrane
model
(ABS/RC,
DIo/RC,
ETo/RC,
TRo/RC)
leaf
(ABS/CSm,
TRo/CSm,
ETo/CSm,
DIo/CSm).
Conversely,
injection
exogenous
exacerbated
stress-related
damage
diminished
beneficial
findings
suggest
stress-induced
photoinhibition
(1)
modulating
concentrations,
(2)
augmenting
PSII
reaction
center
functionality,
(3)
safeguarding
oxygen-evolving
complex
(OEC),
(4)
reinstating
PSI
redox
potential,
(5)
facilitating
electron
transport,
(6)
optimizing
absorption
dissipation.
As
result,
markedly
photochemical
facilitated
development
resilience
Язык: Английский
Nitric Oxide and Melatonin Cross Talk on Photosynthetic Machinery
Molecules,
Год журнала:
2025,
Номер
30(10), С. 2148 - 2148
Опубликована: Май 13, 2025
Nitric
oxide
(NO)
and
melatonin
(MT)
significantly
influence
photosynthetic
processes
by
modulating
redox
homeostasis,
chlorophyll
content,
stomatal
conductance,
gene
expression,
particularly
under
abiotic
stress
conditions.
This
review
summarizes
the
intricate
crosstalk
between
NO
melatonin,
focusing
on
their
coordinated
roles
in
regulating
efficiency.
Evidence
from
various
plant
species
indicates
that
application
of
exogenous
enhances
photosystem
efficiency
(particularly
PSII),
performance,
mitigating
stress-induced
damage.
Molecular
analysis
demonstrates
both
molecules
key
photosystems
I
II,
Calvin
cycle
activities.
Moreover,
collaboratively
regulate
movements
through
ABA,
Ca2⁺,
H2O2
signaling
pathways,
involving
genes
such
as
PMRT1,
CIPKs,
OST1.
Experimental
data
diverse
conditions,
including
drought,
salinity,
heavy
metals,
flooding,
highlight
synergistic
protective
effects.
Exploring
these
mechanisms
further
may
enable
practical
agricultural
strategies
combined
treatments
to
improve
crop
resilience
productivity
increasingly
challenging
environmental
Future
research
directions
should
emphasize
unraveling
detailed
molecular
interactions,
enabling
targeted
biotechnological
applications
improvement
programs
for
enhanced
global
food
security.
Язык: Английский