Biomolecules,
Journal Year:
2023,
Volume and Issue:
13(6), P. 908 - 908
Published: May 30, 2023
Serotonin
N-acetyltransferase
(SNAT)
functions
as
the
penultimate
or
final
enzyme
in
melatonin
biosynthesis,
depending
on
substrate.
The
Escherichia
coli
orthologue
of
archaeal
SNAT
from
Thermoplasma
volcanium
was
identified
RimI
(EcRimI),
with
42%
amino
acid
similarity
to
SNAT.
EcRimI
has
been
reported
be
an
enzyme.
Here,
we
investigated
whether
also
exhibits
activity.
To
achieve
this
goal,
purified
recombinant
and
examined
its
kinetics.
As
expected,
showed
activity
toward
various
amine
substrates
including
serotonin
5-methoxytryptamine,
Km
Vmax
values
531
μM
528
pmol/min/mg
protein
201
587
respectively.
In
contrast
rimI
mutant
E.
strain
that
no
growth
defect,
overexpression
exhibited
a
2-fold
higher
rate
than
control
after
24
h
incubation
nutrient-rich
medium.
produced
more
presence
5-methoxytryptamine.
enhanced
effect
observed
under
cadmium
stress.
associated
expression
attributed
increased
activity,
synthesis
melatonin,
combined
effects
both.
Agriculture,
Journal Year:
2023,
Volume and Issue:
13(10), P. 1983 - 1983
Published: Oct. 12, 2023
The
impact
of
heavy
metal
presence
in
soil
on
cereal
crops
is
a
growing
concern,
posing
significant
challenges
to
global
food
security
and
environmental
sustainability.
Cereal
crops,
vital
sources
nutrition,
face
the
risk
contamination
with
toxic
metals
released
into
environment
through
human
activities.
This
paper
explores
key
aspects
requiring
thorough
investigation
foster
innovation
understand
intricate
interactions
between
cereals.
Visible
symptoms
physiological
changes
resulting
from
contamination,
such
as
chlorosis
stunted
growth,
demand
further
research
devise
targeted
mitigation
strategies
sustainable
agricultural
practices.
Root
barrier
formation,
mycorrhizal
symbiosis,
metal-binding
proteins
emerge
critical
defence
mechanisms
for
combating
stress,
offering
opportunities
developing
metal-tolerant
varieties.
Research
bioavailability
safety
implications
grains
safeguard
health.
reveals
that
multidisciplinary
collaboration
cutting-edge
technologies
are
essential
promoting
beyond
state
art
elucidating
mitigating
impacts
crops.
Genetic
breeding
approaches
show
promise
varieties,
while
agronomic
practices
amendments
can
reduce
toxicity.
Unravelling
complex
underlying
uptake
tolerance
agriculture
worldwide
Embracing
pollution
proactive
secure
resilient
future
amid
evolving
conditions.
Frontiers in Plant Science,
Journal Year:
2023,
Volume and Issue:
14
Published: Jan. 26, 2023
Melatonin
is
a
multifunctional
molecule
that
has
been
widely
discovered
in
most
plants.
An
increasing
number
of
studies
have
shown
melatonin
plays
essential
roles
plant
growth
and
stress
tolerance.
It
extensively
applied
to
alleviate
the
harmful
effects
abiotic
stresses.
In
view
its
role
regulating
aspects
development,
we
ponder
summarize
scientific
discoveries
about
seed
germination,
root
flowering,
fruit
maturation,
senescence.
Under
biotic
stresses,
brings
together
many
pathways
increase
access
treatments
for
symptoms
plants
counteract
negative
effects.
capacity
tackle
regulation
redox,
hormone
networks,
endogenous
melatonin.
Furthermore,
expression
levels
several
genes
contents
diverse
secondary
metabolites,
such
as
polyphenols,
terpenoids,
alkaloids,
were
significantly
altered.
this
review,
intend
examine
actions
from
broader
perspective,
explore
range
physiological
functions,
analyze
relationship
between
other
metabolites
metabolic
pathways.
International Journal of Molecular Sciences,
Journal Year:
2023,
Volume and Issue:
24(10), P. 8759 - 8759
Published: May 15, 2023
Phyto-melatonin
improves
crop
yield
by
mitigating
the
negative
effects
of
abiotic
stresses
on
plant
growth.
Numerous
studies
are
currently
being
conducted
to
investigate
significant
performance
melatonin
in
crops
regulating
agricultural
growth
and
productivity.
However,
a
comprehensive
review
pivotal
phyto-melatonin
morpho-physiological
biochemical
activities
under
needs
be
clarified.
This
focused
research
activities,
regulation,
redox
status,
signal
transduction
plants
stresses.
Furthermore,
it
also
highlighted
role
defense
systems
as
biostimulants
stress
conditions.
The
study
revealed
that
enhances
some
leaf
senescence
proteins,
protein
further
interacts
with
plant’s
photosynthesis
activity,
macromolecules,
changes
response
stress.
Our
goal
is
thoroughly
evaluate
stress,
which
will
help
us
better
understand
mechanism
regulates
yield.
Plants,
Journal Year:
2023,
Volume and Issue:
12(13), P. 2535 - 2535
Published: July 3, 2023
Mung
bean,
a
legume,
is
sensitive
to
abiotic
stresses
at
different
growth
stages,
and
its
yield
potential
affected
by
drought
high-temperature
stress
the
stage.
Melatonin
multifunctional
hormone
that
plays
vital
role
in
plant
defense
mechanisms.
This
study
aimed
evaluate
efficiency
of
melatonin
under
individual
combined
mung
bean.
An
experiment
was
laid
out
with
five
treatments,
including
an
exogenous
application
100
µM
as
seed
treatment,
foliar
spray,
combination
both
treatment
well
absolute
control
(ambient
condition)
(stress
without
treatment).
Stresses
were
imposed
during
bean's
reproductive
stage
(31-40
DAS)
for
ten
days.
Results
revealed
significantly
decreased
chlorophyll
index,
Fv/Fm
ratio,
photosynthetic
rate,
stomatal
conductance,
transpiration
rate
through
increased
reactive
oxygen
species
(ROS)
production.
Foliar
concentration
enhanced
activity
antioxidant
enzymes
such
superoxide
dismutase,
catalase,
ascorbate
peroxidase
metabolites
involved
osmoregulation
ion
homeostasis;
thereby,
it
improves
physiological
yield-related
traits
bean
Plants,
Journal Year:
2023,
Volume and Issue:
12(5), P. 1129 - 1129
Published: March 2, 2023
Melatonin
(MT)
plays
a
number
of
key
roles
in
regulating
plant
growth
and
secondary
metabolite
accumulation.
Prunella
vulgaris
is
an
important
traditional
Chinese
herbal
medicinal
which
used
for
the
treatment
lymph,
goiter,
mastitis.
However,
effect
MT
on
yield
component
content
P.
remains
still
unclear.
In
this
research,
we
have
examined
influence
different
concentrations
(0,
50,
100,
200,
400
μM)
physiological
characteristics,
contents,
biomass.
The
results
showed
that
50–200
μM
had
positive
vulgaris.
at
100
greatly
increased
activities
superoxide
dismutase
peroxidase,
contents
soluble
sugar
proline,
obviously
decreased
relative
electrical
conductivity,
malondialdehyde
hydrogen
peroxide
leaves.
Furthermore,
it
markedly
promoted
development
root
system,
photosynthetic
pigments,
improved
performance
photosystems
I
II
coordination
both
photosystems,
enhanced
capacity
addition,
significantly
dry
mass
whole
spica
accumulation
total
flavonoids,
phenolics,
caffeic
acid,
ferulic
rosmarinic
hyperoside
These
findings
demonstrated
application
could
effectively
activate
antioxidant
defense
system
vulgaris,
protect
apparatus
from
photooxidation
damage,
improve
absorption
capacity,
thereby
promoting
metabolites
International Journal of Molecular Sciences,
Journal Year:
2024,
Volume and Issue:
25(8), P. 4551 - 4551
Published: April 21, 2024
Cereal
crops
are
crucial
for
global
food
security;
however,
they
susceptible
to
various
environmental
stresses
that
significantly
hamper
their
productivity.
In
response,
melatonin
has
emerged
as
a
promising
regulator,
offering
potential
benefits
stress
tolerance
and
crop
growth.
This
review
explores
the
effects
of
on
maize,
sorghum,
millet,
rice,
barley,
wheat,
aiming
enhance
resilience
stress.
The
application
shown
outcomes,
improving
water
use
efficiency
reducing
transpiration
rates
in
millet
under
drought
conditions.
Furthermore,
it
enhances
salinity
heavy
metal
by
regulating
activity
stress-responsive
genes.
Similarly,
sorghum
its
resistance
high
temperatures,
low
humidity,
nutrient
deficiency,
potentially
involving
modulation
antioxidant
defense
aspects
related
photosynthetic
Melatonin
also
exerts
protective
against
drought,
salinity,
metal,
extreme
waterlogging
barley
decreasing
reactive
oxygen
species
(ROS)
production
through
system.
molecular
reactions
upregulated
photosynthesis,
mechanisms,
metabolic
pathway,
genes
downregulated
susceptibility
conclusion,
serves
versatile
tool
cereal
crops,
bolstering
promoting
sustainable
development.
Further
investigations
warranted
elucidate
underlying
mechanisms
refine
techniques
fully
harness
role
systems.
International Journal of Molecular Sciences,
Journal Year:
2023,
Volume and Issue:
24(2), P. 1178 - 1178
Published: Jan. 7, 2023
Melatonin
(MT)
is
a
new
plant
hormone
that
protects
against
adverse
environmental
conditions.
In
the
present
study,
responses
of
Wolffia
arrhiza
exposed
to
cadmium
(Cd)
and
MT
were
analyzed.
Quantitative
analysis
precursors
its
biosynthesis
was
performed
using
LC-MS-MS.
The
photosynthetic
pigments
phytochelatins
(PCs)
contents
determined
HPLC,
while
protein
monosaccharides,
stress
markers,
antioxidant
levels
spectrophotometric
methods.
Interestingly,
endogenous
level
substrates
in
W.
1-100
µM
Cd
significantly
higher
compared
control.
Additionally,
application
25
intensified
these
compounds.
most
stimulatory
effect
on
growth
content
pigments,
protein,
sugars
observed
plants
treated
with
MT.
contrast,
treatment
caused
decrease
weight
compounds,
mitigated
inhibitory
Cd.
enhanced
markers;
simultaneously,
reduced
their
duckweed
Cd,
PC
increased
by
These
results
confirmed
Furthermore,
presence
reported
for
first
time
arrhiza.
summary,
an
essential
phytohormone
development,
especially
during
heavy
metal
stress.
The Science of The Total Environment,
Journal Year:
2024,
Volume and Issue:
919, P. 170871 - 170871
Published: Feb. 9, 2024
MEL
(N-acetyl-5-methoxytryptamine)
is
a
well-known
natural
compound
that
controls
cellular
processes
in
both
plants
and
animals
primarily
found
as
neurohormone.
Its
roles
have
been
described
very
broadly,
from
its
antioxidant
function
related
to
the
photoperiod
determination
of
seasonal
rhythms
role
signalling
molecule,
imitating
action
plant
hormones
(or
even
being
classified
prohormone).
positively
affects
yield
survival
by
increasing
their
tolerance
unfavourable
biotic
abiotic
conditions,
which
makes
widely
applicable
ecological
farming
stimulant
growth
development.
Thus,
it
called
phytobiostimulator.
In
this
review,
we
discuss
genesis
functions,
presence
at
level
effects
on
gene
expression
development,
can
ensure
under
conditions
they
encounter.
Moreover,
consider
future
application
possibilities
agriculture.