Journal of Integrative Agriculture,
Год журнала:
2023,
Номер
22(8), С. 2397 - 2411
Опубликована: Июль 5, 2023
Rhododendron
is
a
well-known
genus
consisting
of
commercially
valuable
ornamental
woody
plant
species.
Heat
stress
major
environmental
factor
that
affects
rhododendron
growth.
Melatonin
was
recently
reported
to
alleviate
the
effects
abiotic
on
plants.
However,
role
melatonin
in
plants
unknown.
In
this
study,
effect
exposed
heat
and
potential
underlying
mechanism
were
investigated.
Analyses
morphological
characteristics
chlorophyll
fluorescence
indicated
200
μmol
L-1
optimal
concentration
for
protecting
from
stress.
To
elucidate
how
limits
adverse
high
temperatures,
contents,
photosynthetic
indices,
Rubisco
activity,
ATP
contents
analyzed
at
25,
35,
40°C.
Compared
with
control,
exogenous
application
improved
electron
transport
rate,
photosystem
II
I
activities,
under
The
transcriptome
analysis
revealed
many
heat-induced
differentially
expressed
genes
associated
pathway;
expression
most
these
down-regulated
by
more
melatonin-free
than
melatonin-treated
We
identified
RhPGR5A,
RhATPB,
RhLHCB3,
RhRbsA
as
key
genes.
Thus,
we
speculate
promotes
transport,
improves
Calvin
cycle
enzyme
increases
production.
These
changes
lead
increased
efficiency
CO2
assimilation
conditions
via
regulated
specific
genes,
including
RhRbsA.
Therefore,
may
increase
tolerance
International Journal of Molecular Sciences,
Год журнала:
2022,
Номер
23(5), С. 2838 - 2838
Опубликована: Март 4, 2022
Heat
stress
(HS)
is
one
of
the
major
abiotic
stresses
affecting
production
and
quality
wheat.
Rising
temperatures
are
particularly
threatening
to
wheat
production.
A
detailed
overview
morpho-physio-biochemical
responses
HS
critical
identify
various
tolerance
mechanisms
their
use
in
identifying
strategies
safeguard
under
changing
climates.
The
development
thermotolerant
cultivars
using
conventional
or
molecular
breeding
transgenic
approaches
promising.
Over
last
decade,
different
omics
have
revolutionized
way
plant
breeders
biotechnologists
investigate
underlying
cellular
homeostasis.
Therefore,
developing
genomics,
transcriptomics,
proteomics,
metabolomics
data
sets
a
deeper
understanding
needed.
most
reliable
method
improve
resilience
must
include
agronomic
management
strategies,
such
as
adoption
climate-smart
cultivation
practices
osmoprotectants
cultured
soil
microbes.
However,
looking
at
complex
nature
HS,
holistic
approach
integrating
outcomes
breeding,
physiological,
agronomical,
biotechnological
options
required.
Our
review
aims
provide
insights
concerning
morpho-physiological
impacts,
mechanisms,
adaptation
This
will
help
scientific
communities
identification,
development,
promotion
minimize
negative
impacts
HS.
International Journal of Molecular Sciences,
Год журнала:
2023,
Номер
24(8), С. 7447 - 7447
Опубликована: Апрель 18, 2023
Increasing
food
demand
by
the
growing
human
population
and
declining
crop
productivity
due
to
climate
change
affect
global
security.
To
meet
challenges,
developing
improved
crops
that
can
tolerate
abiotic
stresses
is
a
priority.
Melatonin
in
plants,
also
known
as
phytomelatonin,
an
active
component
of
various
cellular
mechanisms
alleviates
oxidative
damage
hence
supporting
plant
survive
stress
conditions.
Exogenous
melatonin
strengthens
this
defence
mechanism
enhancing
detoxification
reactive
by-products,
promoting
physiological
activities,
upregulating
stress-responsive
genes
alleviate
during
stress.
In
addition
its
well-known
antioxidant
activity,
protects
against
regulating
hormones,
activating
ER
genes,
increasing
protein
homoeostasis,
heat
shock
transcription
factors
proteins.
Under
stress,
enhances
unfolded
response,
endoplasmic
reticulum-associated
degradation,
autophagy,
which
ultimately
protect
cells
from
programmed
cell
death
promotes
repair
resulting
increased
survival.
