The
application
of
germination
models
in
economic
crop
management
makes
them
extremely
useful
for
predicting
seed
germination.
Hence,
we
examined
the
effect
varying
water
potentials
(Ψs;
0.
-
0.3,
0.6,
0.9,
1.2
MPa)
and
temperatures
(Ts;
20,
25,
30,
35,
40
°C)
on
maize
enzymatic
antioxidant
mechanism.
We
observed
that
Ts
Ψs
significantly
influenced
percentage
(GP)
rate
(GR),
other
parameters,
including
index
(GRI),
(GI),
mean
(MGI),
time
(MGT),
coefficient
velocity
(CVG),
energy
(GE)
(p
≤
0.01).
Maximum
(87.60)
minimum
(55.20)
hydro-time
constant
(θH)
were
reported
at
35
°C
20
°C,
respectively.
In
addition,
base
potential
50
percentiles
was
highest
30
(15.84
lowest
(15.46
MPa).
Furthermore,
optimal,
low,
ceiling
T
(To,
Tb
Tc,
respectively)
determined
as
θT1
θT2
(0
(-
0.9
MPa),
HTT
has
a
higher
value
(R2
=
0.43
sub-optimal
than
supra-optimal
0.41
°C).
Antioxidant
enzymes,
peroxidase
(POD),
catalase
(CAT),
superoxide
dismutase
(SOD),
ascorbate
(APX),
glutathione
(GPX),
increased
with
decreasing
Ψs.
contrast,
CAT
POD
but
declined
°C.
APX
GPX
remained
unchanged
Thus,
maintaining
activity
is
protective
mechanism
against
oxidative
stress.
A
decline
characteristics
may
result
from
diverting
to
anti-stress
tools
(antioxidant
enzymes)
necessary
eliminating
reactive
oxygen
species
(ROS)
reduce
salinity-induced
damage.
parameters
this
study
are
easily
applicable
simulation
Z.
mays
L.
under
extreme
environmental
conditions
characterized
by
deficits
temperature
fluctuations.
Life,
Год журнала:
2022,
Номер
12(3), С. 400 - 400
Опубликована: Март 9, 2022
Germination
models
are
quite
helpful
in
predicting
emergence
times,
dormancy
periods,
and
their
applications
crop
management.
This
study
investigated
the
germination
behaviors
of
Eruca
sativa
Mill.
response
to
fluctuations
temperatures
(Ts)
water
potentials
(ψs).
percentage
(GP)
increased
95%
with
rising
temperature
within
range
20-30
°C,
decreased
25%
at
5
°C.
Moreover,
each
ψ
T
resulted
a
decrease
GP
as
decreased.
Further,
we
noted
that
θT1
value
was
substantially
high
30
°C
(0
MPa),
whereas
θT2
maximum
10
(-0.02
MPa)
it
decreasing
Ψ.
The
hydrothermal
time
constant
(θHTT)
hydrotime
(θH)
values
were
obtained
respectively.
In
addition,
linear
increase
GR(g)
pattern
observed
Tb
below
To.
calculated
cardinal
Ts
for
base
T,
both
optimum
ceiling
T.
characteristics
higher
having
MPa).
Therefore,
using
temperatures,
results,
model
(HTT)
could
reveal
independent
interactive
impacts
Ψ
on
seed
subjected
diverse
environmental
conditions.
Scientific Reports,
Год журнала:
2024,
Номер
14(1)
Опубликована: Фев. 8, 2024
Abstract
The
maize
(
Zea
mays
L.)
is
a
monocot
that
member
of
the
Poaceae
family
and
valuable
feed
for
livestock,
human
food,
raw
material
various
industries.
halothermal
time
model
determines
how
plants
respond
to
salt
(NaCl)
stress
under
sub-optimal
conditions.
This
examines
relation
between
NaClb
(g),
GR,
GP,
salinity
temperature
on
germination
seeds
dynamics
in
crops.
Five
constant
temperatures
i.e.
20,
25,
30,
35,
40
°C
five
ψ
levels
(NaCl
concentrations
converted
−
0,
0.2,
0.4,
0.6,
0.8
MPa)
were
used
this
experiment.
In
light
results,
maximum
halo-thermal
value
was
recorded
at
35
temperature,
while
percentage
detected
30
controlled
condition.
Moreover,
lowermost
20
MPa
osmotic
potential.
highest
CAT,
APX,
GPX
activities
15
MPa,
lowest
values
observed
0
temperature.
conclusion,
by
employing
halo
thermal
model,
variety
(var.30W52)
accurately
predicted
first
varying
potentials.
Life,
Год журнала:
2022,
Номер
12(2), С. 209 - 209
Опубликована: Янв. 29, 2022
Barley
(Hordeum
vulgare
L.)
is
a
salt-tolerant
crop
with
considerable
economic
value
in
salinity-affected
arid
and
semiarid
areas.
In
the
laboratory
experiment,
halothermal
time
(HaloTT)
model
was
used
to
examine
barley
seed
germination
(SG)
at
six
constant
cardinal
temperatures
(Ts)
of
15,
20,
25,
30,
35,
40
°C
under
five
different
water
potentials
(ψs)
0,
-0.5,
-1.5,
-1.0,
-2.0
MPa.
Results
showed
that
optimum
moisture
(0
MPa),
highest
percentage
(GP)
recorded
20
lowest
°C.
Moreover,
GP
increased
accelerated
aging
period
(AAP)
significantly
(p
≤
0.05)
decreased
high
T.
addition,
decrease
ψ
from
0
-1,
1.5,
MPa,
by
93.33,
76.67,
46.67,
33.33%,
respectively,
comparison
The
maximum
halftime
(θHalo)
coefficient
determination
(R2)
values
were
30
°C,
respectively.
temperature
(To)
for
base
Ψ
50th
percentile
(Ψb
(50))
-0.23
Mpa,
standard
deviation
Ψb
(σΨb)
0.21
Ts
15
(Tb),
(To),
(Tc).
GP,
rate
index
(GRI),
(GI),
velocity
(CVG),
energy
(GE),
vigor
I
II
(SVI-I
&
II),
Timson
root
shoot
ratio
(RSR)
MPa
minimum
Mean
(MGT)
50%
(T
50%)
-2
conclusion,
HaloTT
accurately
predicted
course
response
T,
Ψ,
or
NaCl.
Therefore,
can
be
regarded
as
plant
suitable
cultivation
semi-arid
regions
due
its
resistance
salinity.
Plant Stress,
Год журнала:
2023,
Номер
10, С. 100263 - 100263
Опубликована: Окт. 20, 2023
Seed
germination
is
a
complex
physiological
process
influenced
by
abiotic
stresses
such
as
drought,
temperature,
salinity
along
with
other
biological
and
physical
means.
Halothermal
time
model
(HaloTT)
permitted
quantitative
assessment
of
seed
at
different
water
potential
(ψ)
temperature
(T).
The
present
study
aimed
to
evaluate
the
reliability
HaloTT
find
cardinal
values
for
oats
under
various
Ts
ψs.
Avena
sativa
L.
Var.
Swan
seeds
were
incubated
seven
constant
five
ψs
prepared
through
sodium
chloride
(NaCl)
Plant
Physiology
Lab.,
University
Peshawar,
Pakistan.
measured
10,
30
40°C
base
(Tb),
optimum
(To)
ceiling
(Tc)
temperatures
correspondingly
in
distilled
(0
MPa).
maximum
halotime
(θHalo)
was
recorded
48
MPa°Ch−1
30°C
highest
value
thermal
rate
observed
-2.0MPa
40°C.
Germination
percentage
(GP),
index
(GRI),
energy
(GE),
coefficient
velocity
(CVG),
timson
(TGI),
mean
(MGR)
variation
(CVt)
0MPa
30°C,
while
minimum
Contrarily
high
(MGT)
50%
(T50%)
reported
-1.5MPa
10
40°C,
(0MPa)
lowest
25
30°C.
Thus,
we
concluded
that
precisely
interpret
responses
across
may
be
used
an
accurate
simple
method
predict
parameters
natural
field
conditions.
Sustainability,
Год журнала:
2022,
Номер
14(14), С. 8861 - 8861
Опубликована: Июль 20, 2022
Drought
is
a
major
abiotic
stress
forced
by
the
changing
climate
that
affects
plant
production
and
soil
structure
functions.
A
study
was
conducted
to
explore
impacts
of
ascorbic
acid
(AsA)
α-tocopherol
(α-toc)
on
agro-physiological
attributes
antioxidant
enzymes
chickpea
grown
in
water
deficit
regions.
The
results
analysis
showed
electrical
conductivity
(EC)
pH
were
decreased
from
521
mS/m
7.08
151
6.6
20-day
drought
regimes,
respectively.
Agronomic
outcomes
exogenous
application
AsA
α-toc
increased
germination
rate
index
(GRI),
mean
time
(MGT),
energy
(GE),
use
efficiency
(WUE),
percentage
(GP),
seed
vigor
(SVI).
However,
all
above
experienced
decline
under
10-
stress.
Similarly,
Chl.
a,
b,
carotenoids,
proline,
protein,
sugar,
glycine
betaine,
hydrogen
peroxide
contents
significantly
increased.
Meanwhile,
malondialdehyde,
glutathione
reductase,
enzymatic
antioxidants
(APOX,
SOD,
POD)
during
drought,
except
CAT,
which
drought.
fertigation
these
growth
regulators
improved
photosynthetic
pigments
non-enzymatic
stressed
plants.
current
research
concludes
simultaneous
dusting
could
be
an
efficient
technique
mitigate
antagonistic
might
linked
regulation
defense
systems.
