Caffeic acid O-methyltransferase from Ligusticum chuanxiong alleviates drought stress, and improves lignin and melatonin biosynthesis
Frontiers in Plant Science,
Год журнала:
2024,
Номер
15
Опубликована: Сен. 18, 2024
Drought
stress
is
a
major
constraint
on
plant
growth
and
agricultural
productivity.
Caffeic
acid
O-methyltransferase
(COMT),
an
enzyme
involved
in
the
methylation
of
various
substrates,
plays
pivotal
role
responses
to
abiotic
stress.
The
involvement
COMTs
drought
response,
particularly
through
enhancement
lignin
melatonin
biosynthesis,
remains
poorly
understood.
In
this
study,
LcCOMT
was
firstly
proposed
be
associated
with
biosynthesis
both
melatonin,
as
demonstrated
sequence
comparison,
phylogenetic
analysis,
conserved
motif
identification.
vitro
enzymatic
assays
revealed
that
effectively
methylates
N-acetylserotonin
albeit
higher
K
m
value
compared
caffeic
acid.
Site-directed
mutagenesis
residues
Phe171
Asp269
resulted
significant
reduction
catalytic
activity
for
acid,
minimal
impact
N-acetylserotonin,
underscoring
specificity
these
substrate
binding
catalysis.
Under
conditions,
expression
significantly
upregulated.
Overexpression
gene
Arabidopsis
plants
conferred
enhanced
tolerance,
characterized
by
elevated
levels,
increased
chlorophyll
carotenoid
content,
heightened
activities
antioxidant
enzymes
peroxidase
(POD),
catalase
(CAT),
superoxide
dismutase
(SOD),
reduced
malondialdehyde
(MDA)
hydrogen
peroxide
(H
2
O
)
accumulation.
This
study
among
few
demonstrate
COMT-mediated
tolerance
achieved
simultaneous
promotion
biosynthesis.
represents
first
functionally
COMT
Apiaceae
family,
it
holds
potential
target
genetic
future
crop
improvement
strategies.
Язык: Английский
Molecular signatures that translate across omics layers and crops under high aluminium and low phosphorus stress facilitate the identification of reliable molecular targets for genotyping in lentil.
PubMed,
Год журнала:
2025,
Номер
25(1), С. 52 - 52
Опубликована: Март 5, 2025
Язык: Английский
Transmembrane protein, MiRPH1, enhancing plant immunity through SA accumulation and antioxidants
Physiological and Molecular Plant Pathology,
Год журнала:
2025,
Номер
unknown, С. 102691 - 102691
Опубликована: Апрель 1, 2025
Язык: Английский
Transcriptomics–proteomics analysis reveals StCOMT1 regulates drought, alkali and combined stresses in potato
Plant Cell Reports,
Год журнала:
2025,
Номер
44(5)
Опубликована: Апрель 29, 2025
Язык: Английский
Comparative transcriptomic and proteomic analyses of two salt-tolerant alfalfa (Medicago sativa L.) genotypes: investigation of the mechanisms underlying tolerance to salt
Frontiers in Plant Science,
Год журнала:
2024,
Номер
15
Опубликована: Ноя. 13, 2024
Abiotic
stressors
such
as
salt
stress
restrict
plant
development
and
output,
which
lowers
agricultural
profitability.
In
this
study,
alfalfa
(
Medicago
sativa
L.)
varieties
with
different
levels
of
tolerance
were
examined
using
high-throughput
RNA
sequencing
(RNA-Seq)
Tandem
Mass
Tags
(TMT)
technologies
to
study
the
reactions
root
systems
stress,
from
transcriptomics
proteomics
perspectives.
The
Atlantic
(AT)
Zhongmu-1
(ZM-1)
selected
evaluated
after
2
h
6
treatment
150
mM
NaCl.
results
showed
that
under
for
h,
1810
differentially
expressed
genes
(DEGs)
160
proteins
(DEPs)
in
AT
screened,
while
9341
DEGs
193
DEPs
screened
ZM-1.
Under
7536
118
AT,
11,754
190
Functional
annotation
pathway
enrichment
analyses
indicated
DEGS
mainly
involved
glutathione
metabolism,
biosynthesis
secondary
metabolites,
glycolysis/gluconeogenesis,
carbon
fixation
photosynthetic
organisms,
photosynthesis
pathways.
A
series
related
also
identified,
including
GSTL3
GSTU3
GST
gene
family,
PER5
PER10
,
PER
APR
COMT
are
metabolites.
This
provides
insights
into
resistance
mechanisms
plants,
metabolic
pathways
identified
may
be
helpful
breeding
future.
Язык: Английский