Genetic dissection of the tissue‐specific roles of type III effectors and phytotoxins in the pathogenicity of Pseudomonas syringae pv. syringae to cherry
Molecular Plant Pathology,
Год журнала:
2024,
Номер
25(4)
Опубликована: Апрель 1, 2024
Abstract
When
compared
with
other
phylogroups
(PGs)
of
the
Pseudomonas
syringae
species
complex,
P.
pv.
s
yringae
(Pss)
strains
within
PG2
have
a
reduced
repertoire
type
III
effectors
(T3Es)
but
produce
several
phytotoxins.
Effectors
cherry
pathogen
Pss
9644
were
grouped
based
on
their
frequency
in
from
Prunus
as
conserved
effector
locus
(CEL)
common
to
most
pathogens;
core
PG2;
set
PRUNUS
and
FLEXIBLE
T3Es.
also
contains
gene
clusters
for
biosynthesis
toxins
syringomycin,
syringopeptin
syringolin
A.
After
confirmation
virulence
expression,
mutants
sequential
series
T3E
toxin
deletions
pathogenicity
tested
wood,
leaves
fruits
sweet
(
avium
)
ornamental
incisa
).
The
had
key
role
disease
development
less
important
wood.
An
effectorless
mutant
retained
some
fruit
not
wood
or
leaves.
Striking
redundancy
was
observed
amongst
groups.
CEL
roles
during
early
stages
leaf
infection
possibly
acted
synergistically
all
tissues.
Deletion
separate
groups
T3Es
more
effect
than
.
Mixed
inocula
used
complement
mutations
trans
indicated
that
strain
mixtures
may
be
field.
Our
results
highlight
niche‐specific
tissues
complexity
9644.
Язык: Английский
A necrotizing toxin enables Pseudomonas syringae infection across evolutionarily divergent plants
Cell Host & Microbe,
Год журнала:
2024,
Номер
unknown
Опубликована: Дек. 1, 2024
Язык: Английский
Exploring the open (host) range
Cell Host & Microbe,
Год журнала:
2025,
Номер
33(1), С. 10 - 12
Опубликована: Янв. 1, 2025
Язык: Английский
Global Insights into Bacterial Canker of Stone Fruits Caused by the Pseudomonas Syringae Species Complex
Plant Health Cases,
Год журнала:
2025,
Номер
unknown
Опубликована: Май 2, 2025
Abstract
Stone
fruits
(
Prunus
spp.)
are
economically
and
nutritionally
valuable
commodities,
with
production
concentrated
in
the
temperate
regions.
In
UK,
limited
to
cherries
plums,
trends
highlight
a
resurgence
cherry
yields
due
modern
practices.
However,
bacterial
cankers,
caused
by
diverse
strains
of
P
.
syringae
,
pose
significant
threats
spp.,
affecting
both
commercial
orchards
ornamental
plant
nurseries.
This
disease,
characterised
gummosis,
necrotic
lesions
woody
tissues,
incurs
severe
economic
losses,
young
particularly
vulnerable.
Surveys
have
revealed
emergence
novel
pathogens
populations,
predominant
groups
varying
across
continents.
Advances
molecular
techniques
improved
pathogen
classification
resistance
screening
cultivars
is
increasing.
Addressing
cankers
requires
integrating
knowledge
lifecycles,
virulence
factors,
host-pathogen
interactions
into
management
strategies.
Current
research
focuses
on
evolution,
breeding
resistant
tree
cultivars,
implementing
new
biocontrol
strategies
mitigate
ecological
impacts.
Information
©
The
Authors
2025
Язык: Английский
Pathogenicity, phylogenomic, and comparative genomic study of Pseudomonas syringae sensu lato affecting sweet cherry in California
Microbiology Spectrum,
Год журнала:
2024,
Номер
12(10)
Опубликована: Сен. 3, 2024
To
gain
insights
into
the
diversity
of
Язык: Английский
A Necrotizing Toxin Promotes Pseudomonas syringae Infection Across Evolutionarily Divergent Plant Lineages
bioRxiv (Cold Spring Harbor Laboratory),
Год журнала:
2024,
Номер
unknown
Опубликована: Июль 19, 2024
ABSTRACT
The
Pseudomonas
syringae
species
complex
harbors
a
diverse
range
of
plant
pathogenic
bacteria.
While
much
the
current
understanding
P.
is
centered
on
interactions
with
flowering
plants,
less
known
about
infection
in
evolutionarily
divergent
non-flowering
lineages.
Here,
we
took
comparative
evolutionary
approach
to
understand
how
infects
distantly
related
plants.
We
identify
broad
host
isolates
causing
significant
disease
liverwort
Marchantia
polymorpha
,
fern
Ceratopteris
richardii
and
Nicotiana
benthamiana
which
last
shared
common
ancestor
over
500
million
years
ago.
demonstrate
that
phytotoxin
enriched
belonging
phylogroup
2
clade
are
particularly
virulent
relying
combination
type-3
secreted
effector
proteins
lipopeptide
syringomycin.
application
purified
syringomycin
promotes
necrosis
tissues
activates
conserved
genes
associated
redox
regulation
cell
death.
Toxin-deficient
phylogroups
normally
unable
infect
thalli
exhibit
enhanced
bacterial
growth
when
supplemented
exogenous
syringomycin,
further
highlighting
its
role
as
host-range
defining
factor
.
Collectively
our
research
reveals
key
for
promoting
colonization,
works
concert
antagonize
an
exceptionally
wide
spectrum
land
Язык: Английский