Paper · 1995 · Weed Science

Influences of Temperature, Light and Water Stress on Germination of Fringed Sage (Artemisia frigida)

Yuguang Bai; James T. Romo; James A. Young

8
claims
16
verbatim quotes
15
citations
1
research areas
—
Not open access

Abstract

Experiments were conducted to determine the influences of temperature, light, winter storage, and water stress on seed germination of fringed sage. Seeds collected in 3 yr in central Saskatchewan were placed in sealed vials and buried in the soil after harvest, and germination was tested in spring and early summer. Seeds germinated over a wide range of temperatures with alternating 25/15 C being optimal. The range of optimal temperatures was higher for older seeds than younger seeds. The stimulating effect of light on germination varied among collections and incubating temperatures. Total germination and germination rate was limited by water stress and no seeds germinated at osmotic potentials below −0.9 MPa. Seeds hydrated in the autumn and exposed to low winter temperatures had higher germination the following spring than dry seeds exposed to the same conditions. Results suggest that sufficient soil moisture combined with moderate seedbed temperatures are optimal for fringed sage germination. Periodicity of germination may be influenced by variable germination requirements in different aging seeds.

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Claims 8

Observationobservedoriginal resultmeasured

Claim · model-written summary

Fringed sage seeds germinated over a wide range of temperatures, with alternating 25/15 C being optimal.

Taxon
fringed sagee0
Treatment
alternating 25/15 Ce1
Outcome
germinatede1

Verbatim

e0

“seed germination of fringed sage”

✓ located verbatim in the source · abstract, characters 114–146 · show in text ↑
e1

“Seeds germinated over a wide range of temperatures with alternating 25/15 C being optimal”

✓ located verbatim in the source · abstract, characters 317–406 · show in text ↑
Associationobservedoriginal resultmeasured

Claim · model-written summary

The range of optimal germination temperatures was higher for older seeds than for younger seeds.

Taxon
fringed sagee0
Outcome
range of optimal temperaturese2
Direction
highere2
Comparator
younger seedse2

Verbatim

e0

“seed germination of fringed sage”

✓ located verbatim in the source · abstract, characters 114–146 · show in text ↑
e2

“The range of optimal temperatures was higher for older seeds than younger seeds”

✓ located verbatim in the source · abstract, characters 408–487 · show in text ↑
Observationobservedoriginal resultmixedmeasured

Claim · model-written summary

The stimulating effect of light on germination varied among collections and incubating temperatures.

Taxon
fringed sagee0
Outcome
stimulating effect of light on germinatione3
Qualifier
varied among collections and incubating temperaturese3

Verbatim

e0

“seed germination of fringed sage”

✓ located verbatim in the source · abstract, characters 114–146 · show in text ↑
e3

“The stimulating effect of light on germination varied among collections and incubating temperatures”

✓ located verbatim in the source · abstract, characters 489–588 · show in text ↑
Associationobservedoriginal resultnegativemeasured

Claim · model-written summary

Total germination and germination rate of fringed sage were limited by water stress.

Taxon
fringed sagee0
Treatment
water stresse4
Outcome
Total germination and germination ratee4
Direction
limitede4

Verbatim

e0

“seed germination of fringed sage”

✓ located verbatim in the source · abstract, characters 114–146 · show in text ↑
e4

“Total germination and germination rate was limited by water stress”

✓ located verbatim in the source · abstract, characters 590–656 · show in text ↑
Observationobservedoriginal resultnegativemeasured

Claim · model-written summary

No fringed sage seeds germinated at osmotic potentials below -0.9 MPa.

Taxon
fringed sagee0
Treatment
osmotic potentials below −0.9 MPae5
Outcome
germinatede5
Value
−0.9 MPae5

Verbatim

e0

“seed germination of fringed sage”

✓ located verbatim in the source · abstract, characters 114–146 · show in text ↑
e5

“no seeds germinated at osmotic potentials below −0.9 MPa”

✓ located verbatim in the source · abstract, characters 661–717 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Seeds hydrated in autumn and exposed to low winter temperatures had higher spring germination than dry seeds exposed to the same conditions.

Taxon
fringed sagee0
Treatment
hydrated in the autumn and exposed to low winter temperaturese6
Outcome
germinatione6
Direction
highere6
Qualifier
the following springe6
Comparator
dry seeds exposed to the same conditionse6

Verbatim

e0

“seed germination of fringed sage”

✓ located verbatim in the source · abstract, characters 114–146 · show in text ↑
e6

“Seeds hydrated in the autumn and exposed to low winter temperatures had higher germination the following spring than dry seeds exposed to the same conditions”

✓ located verbatim in the source · abstract, characters 719–876 · show in text ↑
Recommendationauthor interpretationoriginal resultpositivebasis n/a

Claim · model-written summary

Sufficient soil moisture combined with moderate seedbed temperatures is optimal for fringed sage germination.

Taxon
fringed sagee0
Treatment
sufficient soil moisture combined with moderate seedbed temperaturese7
Outcome
fringed sage germinatione7

Verbatim

e0

“seed germination of fringed sage”

✓ located verbatim in the source · abstract, characters 114–146 · show in text ↑
e7

“Results suggest that sufficient soil moisture combined with moderate seedbed temperatures are optimal for fringed sage germination”

✓ located verbatim in the source · abstract, characters 878–1008 · show in text ↑
Mechanismhypothesisoriginal resultbasis n/a

Claim · model-written summary

Periodicity of fringed sage germination may be influenced by variable germination requirements of differently aged seeds.

Taxon
fringed sagee0
Outcome
periodicity of germinatione1
Qualifier
variable germination requirements in different aging seedse1

Verbatim

e0

“seed germination of fringed sage”

✓ located verbatim in the source · abstract, characters 114–146 · show in text ↑
e1

“Periodicity of germination may be influenced by variable germination requirements in different aging seeds”

✓ located verbatim in the source · abstract, characters 1010–1116 · show in text ↑