Research Square (Research Square),
Год журнала:
2023,
Номер
unknown
Опубликована: Сен. 29, 2023
Abstract
The
present
investigation
focussed
on
the
production
of
metabolites
such
as
phytase,
carotenoid
pigment,
lipids,
and
exopolysaccharide
content
by
a
hyper
producing
putative
mutant
strain
Rhodotorula
minuta
.
Several
mutants
namely
MR5,
MR7,
MR9,
MR13,
CMR1,
CMR2
were
isolated
after
series
UV
chemical
(Ethyl
methane
sulfonate,
EMS)
mutagenesis
an
orange
yeast
strain,
effect
different
temperatures
these
was
tested.
result
showed
highest
phytase
from
CMR1
(26.735
U/ml)
MR7
(21.620
at
30
35°C
respectively.
With
respect
to
production,
yield
1000
1300
mg/l
obtained
40°C
with
MR9
CMR2,
respectively,
while
lipid
MR5
(34
g/kg)
(11
25°C.
Total
in
MR13
445
µg/kg
it
found
be
454
dry
cell
weight
All
strains
produced
amount
one
or
other
tested
metabolites.
both
good
maximum
accumulation
cells.
Deleted Journal,
Год журнала:
2024,
Номер
1(1), С. 100004 - 100004
Опубликована: Янв. 30, 2024
Natural
products
have
attracted
wide
attention
in
the
cosmetics
market
due
to
their
safety
and
high
efficiency.
As
a
highly
active
substance
nature,
natural
polysaccharides
been
reported
recent
years
various
cosmetic
activities
such
as
moisturizing,
whitening,
anti-aging
repairing
skin,
are
becoming
hot
research
topic
industry.
At
present,
mechanism
of
polysaccharide
exerting
activity
has
widely
studied,
but
relationship
between
polysaccharide's
chemical
structure
not
effectively
analyzed,
which
leads
limitation
development.
In
this
review,
skin
repair
was
introduced.
The
potential
summarized
by
analyzing
influence
physical
properties
polysaccharides,
extraction
method,
molecular
weight,
monosaccharide
composition,
functional
group
structural
modification,
etc.,
laid
foundation
for
analysis
improved
its
value.
Microbial Cell Factories,
Год журнала:
2024,
Номер
23(1)
Опубликована: Фев. 22, 2024
Abstract
The
marine
black
yeasts
are
characterized
by
the
production
of
many
novel
protective
substances.
These
compounds
increase
their
physiological
adaptation
to
multi-extreme
environmental
stress.
Hence,
exopolysaccharide
(EPS)
producing
yeast
SAHE
was
isolated
in
this
study.
It
molecularly
identified
as
Hortaea
werneckii
(identity
98.5%)
through
ITS1
and
ITS4
gene
sequencing
analysis.
physicochemical
properties
SAHE-EPS
were
investigated
FTIR,
GC-MS,
TGA,
ESM,
EDX
analysis,
revealing
its
heteropolysaccharide
nature.
found
be
thermostable
mainly
consists
sucrose,
maltose,
cellobiose,
lactose,
galactose.
Furthermore,
it
exhibited
an
amorphous
texture
irregular
porous
surface
structure.
showed
significant
antiradical
activity,
demonstrated
DPPH
radical
scavenging
assay,
IC50
recorded
984.9
μg/mL.
In
addition,
outstanding
anticancer
activity
toward
A549
human
lung
cancer
cell
line
(IC50
=
22.9
μg/mL).
Conversely,
demonstrates
minimal
cytotoxicity
WI-38
normal
203
μg/mL),
which
implies
safety.
This
study
represents
initial
attempt
isolate
characterize
chemical
EPS
produced
H.
a
promising
agent.
Journal of Basic Microbiology,
Год журнала:
2024,
Номер
unknown
Опубликована: Окт. 16, 2024
ABSTRACT
Bacteria
and
fungi
are
natural
sources
of
metabolites
exhibiting
diverse
bioactive
properties
such
as
wound
healing,
antioxidative,
antibacterial,
antifungal,
anti‐inflammatory,
antidiabetic,
anticancer
activities.
Two
important
groups
bacteria
or
fungi‐derived
with
wound‐healing
potential
polysaccharides
peptides.
In
addition
to
bacteria‐derived
cellulose
hyaluronic
acid
chitin
chitosan,
these
organisms
also
produce
different
(e.g.,
exopolysaccharides)
potential.
The
most
commonly
used
bacterial
peptides
in
healing
studies
bacteriocins
lipopeptides.
exhibit
both
the
vitro
vivo
potency.
models,
including
animals
humans,
positively
affect
by
inhibiting
pathogens,
antioxidant
activity,
modulating
inflammatory
response,
moisturizing
environment,
promoting
proliferation
migration
fibroblasts
keratinocytes,
increasing
collagen
synthesis,
re‐epithelialization,
angiogenesis.
Therefore,
derived
from
have
medicinal
importance.
This
study
aims
overview
current
literature
knowledge
(especially
within
past
5
years)
on
repair
potentials
obtained
(Actinobacteria,
Bacteroidetes,
Cyanobacteria,
Firmicutes,
Proteobacteria)
(yeasts,
filamentous
microfungi,
mushrooms).
Physiologia Plantarum,
Год журнала:
2025,
Номер
177(3)
Опубликована: Май 1, 2025
ABSTRACT
Understanding
how
plant‐associated
yeasts
mediate
plant
fitness
under
environmental
stress
remains
mostly
elusive.
Here,
the
role
of
auxin
and
salicylic
acid
(SA)‐producing
psychrophilic
yeast
endophyte
Naganishia
liquefaciens
strain
ARY7,
isolated
from
roots
cold‐desert
Arnebia
euchroma
,
was
investigated
for
low
temperature
(LT;
10°C)
tolerance
in
Arabidopsis
thaliana
.
ARY7‐inoculated
plants
had
higher
biomass,
exhibited
photosynthetic
efficiency,
starch
accumulation,
reduced
stress‐responsive
parameters
at
10°C
than
their
non‐inoculated
controls.
ARY7‐inoculation
enhanced
signaling
roots,
leading
to
more
lateral
root
hair
development
10°C.
Increased
exopolysaccharide
(EPS)
accumulation
around
colonization
by
ARY7
also
suggested
its
cold
tolerance.
The
SA‐production
ability
supported
elevated
SA
levels
upregulation
key
biosynthesis
genes
(
SID2
PBS3
)
In
addition,
an
improved
seedling
phenotype
sid2
(SA‐deficient)
mutants
further
confirmed
ARY7‐produced
SA‐mediated
fitness.
downregulated
expression
cold‐responsive
CBF
COR
RD29A
P5CS1
leaves
indicated
sensitivity
LT.
This
study
established
that
ARY7‐mediated
is
due
increased
ARY7‐root
through
EPS
production
involves
signaling.
provides
valuable
insights
explore
protecting
various
abiotic
stresses,
including
temperature.
