Plant Biology,
Journal Year:
2020,
Volume and Issue:
23(S1), P. 7 - 19
Published: Oct. 24, 2020
Melatonin,
a
molecule
first
discovered
in
animal
tissues,
plays
an
important
role
multiple
physiological
responses
as
possible
plant
master
regulator.
It
mediates
to
different
types
of
stress,
both
biotic
and
abiotic.
Melatonin
reduces
the
negative
effects
associated
with
stressors,
improving
response
by
increasing
stress
tolerance.
When
plants
respond
situations,
they
use
up
large
amount
resources
through
set
perfectly
synchronized
actions.
Responses
mediated
melatonin
plant's
hormones
to,
after
adequate
modulation,
counteract
overcome
action
stressor.
In
this
paper,
we
review
melatonin-plant
hormone
relationships.
Factors
that
trigger
central
are
analysed.
An
extensive
analysis
current
studies
shows
modulates
metabolism
(biosynthesis
catabolism),
rise
or
fall
their
endogenous
levels,
regulation
signalling
elements
how
affects
final
auxin,
gibberellins,
cytokinins,
abscisic
acid,
ethylene,
salicylic
jasmonates,
brassinosteroids,
polyamines
strigolactones.
Lastly,
general
overview
melatonin's
actions
its
regulatory
at
global
level
is
provided
proposals
for
future
research
made.
Plants,
Journal Year:
2020,
Volume and Issue:
9(4), P. 407 - 407
Published: March 25, 2020
Melatonin
is
a
multifunctional
signaling
molecule
that
ubiquitously
distributed
in
different
parts
of
plant
and
responsible
for
stimulating
several
physio-chemical
responses
to
adverse
environmental
conditions.
In
this
review,
we
show
that,
although
plants
are
able
biosynthesize
melatonin,
the
exogenous
application
melatonin
various
crops
can
improve
growth
development
response
abiotic
biotic
stresses
(e.g.,
drought,
unfavorable
temperatures,
high
salinity,
heavy
metal
contamination,
acid
rain,
combined
stresses)
by
regulating
antioxidant
machinery
plants.
Current
knowledge
suggests
exogenously
applied
enhance
stress
tolerance
both
enzymatic
non-enzymatic
defense
systems.
Enzymic
antioxidants
upregulated
include
superoxide
dismutase,
catalase,
glutathione
peroxidase,
enzymes
involved
ascorbate–glutathione
cycle
(ascorbate
monodehydroascorbate
reductase,
dehydroascorbate
reductase),
whereas
levels
such
as
ascorbate,
reduced
glutathione,
carotenoids,
tocopherols,
phenolics
also
higher
under
The
enhanced
system
consequently
exhibits
lower
lipid
peroxidation
greater
plasma
membrane
integrity
when
stress.
However,
these
vary
greatly
from
crop
depend
on
intensity
type
stress,
most
studies
date
have
been
conducted
controlled
This
means
wider
range
field
trials
detailed
transcriptomic
analysis
required
reveal
gene
regulatory
networks
between
antioxidants,
Journal of Experimental Botany,
Journal Year:
2020,
Volume and Issue:
71(16), P. 4677 - 4689
Published: May 7, 2020
Abstract
Plant
melatonin
research
is
a
rapidly
developing
field.
A
variety
of
isoforms
melatonin’s
biosynthetic
enzymes
are
present
in
different
plants.
Due
to
the
origins,
they
exhibit
independent
responses
variable
environmental
stimuli.
The
locations
for
biosynthesis
plants
chloroplasts
and
mitochondria.
These
organelles
have
inherited
their
capacities
from
bacterial
ancestors.
Under
ideal
conditions,
main
sites
biosynthesis.
If
chloroplast
pathway
blocked
any
reason,
mitochondrial
will
be
activated
maintain
its
production.
Melatonin
metabolism
less
studied
field;
quite
that
animals
even
though
share
similar
metabolites.
Several
new
been
cloned
these
absent
animals.
It
seems
2-hydroxymelatonin
major
metabolite
level
~400-fold
higher
than
melatonin.
In
current
article,
an
evolutionary
point
view,
we
update
information
on
plant
metabolism.
This
review
help
reader
understand
complexity
processes
promote
enthusiasm
fields.
The Plant Journal,
Journal Year:
2019,
Volume and Issue:
100(4), P. 784 - 800
Published: July 26, 2019
Plants
endure
challenging
environments
in
which
they
are
constantly
threatened
by
diverse
pathogens.
The
soil-borne
fungus
Verticillium
dahliae
is
a
devastating
pathogen
affecting
many
plant
species
including
cotton,
it
significantly
reduces
crop
yield
and
fiber
quality.
Melatonin
involvement
immunity
to
pathogens
has
been
reported,
but
the
mechanisms
of
melatonin-induced
resistance
unclear.
In
this
study,
role
melatonin
enhancing
cotton
V.
was
investigated.
At
transcriptome
level,
exogenous
increased
expression
genes
phenylpropanoid,
mevalonate
(MVA),
gossypol
pathways
after
inoculation.
As
result,
lignin
gossypol,
products
these
metabolic
pathways,
increased.
Silencing
serotonin
N-acetyltransferase
1
(GhSNAT1)
caffeic
acid
O-methyltransferase
(GhCOMT)
biosynthesis
compromised
resistance,
with
reduced
levels
Exogenous
pre-treatment
prior
inoculation
restored
level
above
gene
silencing
effects.
were
higher
resistant
cultivars
than
susceptible
findings
indicate
that
affects
synthesis
MVA,
thereby
dahliae.
Plant Biology,
Journal Year:
2020,
Volume and Issue:
23(S1), P. 7 - 19
Published: Oct. 24, 2020
Melatonin,
a
molecule
first
discovered
in
animal
tissues,
plays
an
important
role
multiple
physiological
responses
as
possible
plant
master
regulator.
It
mediates
to
different
types
of
stress,
both
biotic
and
abiotic.
Melatonin
reduces
the
negative
effects
associated
with
stressors,
improving
response
by
increasing
stress
tolerance.
When
plants
respond
situations,
they
use
up
large
amount
resources
through
set
perfectly
synchronized
actions.
Responses
mediated
melatonin
plant's
hormones
to,
after
adequate
modulation,
counteract
overcome
action
stressor.
In
this
paper,
we
review
melatonin-plant
hormone
relationships.
Factors
that
trigger
central
are
analysed.
An
extensive
analysis
current
studies
shows
modulates
metabolism
(biosynthesis
catabolism),
rise
or
fall
their
endogenous
levels,
regulation
signalling
elements
how
affects
final
auxin,
gibberellins,
cytokinins,
abscisic
acid,
ethylene,
salicylic
jasmonates,
brassinosteroids,
polyamines
strigolactones.
Lastly,
general
overview
melatonin's
actions
its
regulatory
at
global
level
is
provided
proposals
for
future
research
made.
