Journal of Phytopathology,
Год журнала:
2024,
Номер
172(6)
Опубликована: Ноя. 1, 2024
ABSTRACT
Black
Sigatoka
disease
is
a
significant
threat
to
banana
(
Musa
spp.)
fruit
yield
and
quality.
For
the
control
of
fungal
pathogen,
Pseudocercospora
fijiensis
,
producers
currently
rely
on
fungicides
such
as
Quinone
outside
Inhibitor
(QoI).
In
this
study,
we
examined
resistance
status
P.
QoI
using
80
isolates
from
24
localities
in
main
banana‐producing
areas
Mexico
(Colima,
Michoacán,
Tabasco
Chiapas).
Resistance
was
evaluated
RFLP‐PCR
mutation
assay
Cytochrome
b
gen
(Cyt
).
The
results
showed
G143A
three
Chiapas,
indicating
relatively
low
frequency
sampled
areas,
where
additionally,
microplate
bioassay
confirmed
fungicides.
We
also
genetic
structure
differentiation
among
populations,
detecting
differences
between
populations
within
each
region
all
populations.
Furthermore,
our
analysis
revealed
shared
haplotypes
resistant
Chiapas
nonresistant
Michoacán.
These
findings
provide
valuable
insight
into
serve
foundation
for
development
strategies
manage
strobilurin
country.
Overall,
study
highlights
importance
monitoring
implementing
effective
management
practices
mitigate
spread
strains.
European Journal of Plant Pathology,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 9, 2025
Abstract
Septoria
nodorum
blotch
(SNB)
of
wheat
is
caused
by
a
complex
related
fungi
that
infect
both
leaves
and
ears.
The
most
intensively
studied
member
the
species
Parastagonospora
nodorum,
which
causes
majority
SNB.
While
P.
best
known
as
model
pathogen
for
elucidating
inverse
gene-for-gene
interaction,
knowledge
its
population
biology
also
quite
advanced.
emerged
during
domestication
in
Fertile
Crescent.
It
then
followed
spread
agriculture
around
world,
likely
moving
on
infected
seed.
Field
populations
world
contain
high
levels
genetic
phenotypic
diversity.
This
diversity
reflects
fungus,
includes
regular
cycles
sexual
recombination,
amounts
gene
flow
over
regional
scales,
large
sizes
at
field
scale.
One
hectare
moderately
estimated
to
about
1.8
million
strains
produce
approximately
10
trillion
spores
include
70
adapted
mutant
growing
season.
standing
enables
rapid
adaptation
any
selective
agent,
including
deployments
fungicides
resistant
cultivars.
key
SNB
management
goal
reduce
total
size,
aiming
number
ascospores
produced
between
seasons.
strategy
can
be
used
achieve
this
implement
practices
dynamic
across
ABSTRACT
Although
plant
breeding
and
chemical
approaches
contribute
to
disease
control,
they
are
not
able
completely
contain
it,
due
the
ability
of
pathogen
resist
against
fungicides
may
overcome
resistance
offered
by
plants
certain
genotypes.
Endophytic
Penicillium
citrinum
strains
GP1
GP3,
inoculated
on
seeds
before
sowing
or
sprayed
leaves,
reduced
severity
rice
blast
while
improving
growth
from
cultivar
BRSMG
Caçula.
Rice
seed
treatment
with
conidia
P.
prior
seeding,
led
a
58%
reduction
severity.
An
association
GP3
applied
via
foliar
spray
decreased
33
37%,
respectively.
The
area
under
progress
curve
(T5)
was
lower
than
other
treatments.
For
promotion,
significantly
enhanced
number
tillers
per
11
as
compared
10.
Microscopic
analysis
revealed
endophytic
colonization
root
tissues
GP3.
in
their
fitness.
Frontiers in Plant Science,
Год журнала:
2025,
Номер
16
Опубликована: Апрель 4, 2025
The
necrotrophic
fungal
phytopathogen,
Sclerotinia
sclerotiorum
(Lib.)
de
Bary,
employs
a
multilayered
strategy
to
infect
wide
range
of
host
plants.
current
study
proposed
the
diamine
L
-ornithine,
non-proteinogenic
amino
acid
that
promotes
synthesis
other
essential
acids,
as
an
alternative
management
boost
molecular,
physiological,
and
biochemical
responses
common
bean
(
Phaseolus
vulgaris
L.)
against
white
mold
disease
caused
by
S.
.
In
vitro
experiments
showed
-ornithine
significantly
inhibited
mycelial
growth
in
dose-dependent
manner.
Moreover,
it
markedly
diminished
severity
under
greenhouse
conditions.
stimulated
treated
plants
suggesting
tested
concentration
has
no
phytotoxicity
on
Additionally,
enhanced
non-enzymatic
antioxidants
(total
soluble
phenolics
flavonoids),
enzymatic
(CAT,
POX,
PPO),
upregulated
gene
expression
three
antioxidant-associated
genes
PvCAT1
,
PvSOD
PvGR
).
silico
analysis
genome
possesses
putative
oxaloacetate
acetylhydrolase
SsOAH
)
protein
is
highly
similar
its
functional
analysis,
conserved
domains,
topology
with
OAH
from
Aspergillus
fijiensis
AfOAH
Penicillium
lagena
PlOAH
Interestingly,
addition
potato
dextrose
broth
(PDB)
medium
down-regulated
mycelium
Likewise,
exogenous
application
mycelia
collected
Finally,
secretion
oxalic
PDB
well
infected
leaves.
Collectively,
plays
pivotal
role
maintaining
redox
status,
boosting
defense
provides
insights
may
lead
innovative
eco-friendly
approaches
for
controlling
mitigating
impact
cultivation
particularly,
crops
general.
