Paper · 1996 · Acervo Digital da Universidade Estadual Paulista (Universidade Estadual Paulista)

On the germination and dormancy of dispersal units of Brachiaria decumbens staff

Vandré Lopes De Lima; Victor José Mendes Cardoso

6
claims
11
verbatim quotes
5
citations
1
research areas
—
Not open access

Abstract

The effect of light and temperature on germination of Brachiaria decumbens as well as the action of some dormancy breaking chemicals were tested. Two seed batches stored different times were used. The results show that seeds failed to respond to alternating temperature regimes and different light qualities. Seeds were indifferent to white light at 25°C. KNO3, ethanol and H2SO4 failed to break seed dormancy, whereas KCN and H2O2 partially reduced dormancy of two month stored seeds. The results suggest a metabolic character of dormancy in new (freshly collected) seeds and confirm the occurence of two types of dormancy in B. decumbens seeds.

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Claims 6

Intervention effectobservedoriginal resultno effectmeasured

Claim · model-written summary

Brachiaria decumbens seeds did not respond to alternating temperature regimes or different light qualities in germination.

Taxon
Brachiaria decumbensUrochloa decumbense0
Organ / stage
seedse1
Treatment
alternating temperature regimes and different light qualitiese1
Outcome
germinatione0
Direction
no_changeinferrede0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Urochloa decumbens
Urochloa decumbens · TaxonHarry Rose from South West Rocks, Australia · CC BY 2.0 · Wikimedia Commons ↗

Verbatim

e0

“The effect of light and temperature on germination of Brachiaria decumbens”

✓ located verbatim in the source · abstract, characters 0–74 · show in text ↑
e1

“The results show that seeds failed to respond to alternating temperature regimes and different light qualities”

✓ located verbatim in the source · abstract, characters 197–307 · show in text ↑
Intervention effectobservedoriginal resultno effectmeasured

Claim · model-written summary

Brachiaria decumbens seeds were indifferent to white light at 25°C in germination.

Taxon
Brachiaria decumbensUrochloa decumbense0
Organ / stage
Seedse2
Treatment
white light at 25°Ce2
Outcome
germinatione0
Direction
no_changeinferrede0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Urochloa decumbens
Urochloa decumbens · TaxonHarry Rose from South West Rocks, Australia · CC BY 2.0 · Wikimedia Commons ↗

Verbatim

e0

“The effect of light and temperature on germination of Brachiaria decumbens”

✓ located verbatim in the source · abstract, characters 0–74 · show in text ↑
e2

“Seeds were indifferent to white light at 25°C”

✓ located verbatim in the source · abstract, characters 309–354 · show in text ↑
Intervention effectobservedoriginal resultno effectmeasured

Claim · model-written summary

KNO3, ethanol and H2SO4 did not break dormancy of Brachiaria decumbens seeds.

Taxon
Brachiaria decumbensUrochloa decumbense0
Treatment
KNO3, ethanol and H2SO4e3
Outcome
dormancye3
Direction
no_changeinferrede3

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Urochloa decumbens
Urochloa decumbens · TaxonHarry Rose from South West Rocks, Australia · CC BY 2.0 · Wikimedia Commons ↗

Verbatim

e0

“The effect of light and temperature on germination of Brachiaria decumbens”

✓ located verbatim in the source · abstract, characters 0–74 · show in text ↑
e3

“KNO3, ethanol and H2SO4 failed to break seed dormancy”

✓ located verbatim in the source · abstract, characters 356–409 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

KCN and H2O2 partially reduced dormancy of two-month-stored Brachiaria decumbens seeds.

Taxon
Brachiaria decumbensUrochloa decumbense0
Organ / stage
seedse4
Treatment
KCN and H2O2e4
Outcome
dormancye4
Direction
reducede4
Qualifier
two month storede4

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Urochloa decumbens
Urochloa decumbens · TaxonHarry Rose from South West Rocks, Australia · CC BY 2.0 · Wikimedia Commons ↗

Verbatim

e0

“The effect of light and temperature on germination of Brachiaria decumbens”

✓ located verbatim in the source · abstract, characters 0–74 · show in text ↑
e4

“KCN and H2O2 partially reduced dormancy of two month stored seeds”

✓ located verbatim in the source · abstract, characters 419–484 · show in text ↑
Mechanismauthor interpretationoriginal resultbasis n/a

Claim · model-written summary

Dormancy in new, freshly collected Brachiaria decumbens seeds suggests a metabolic character.

Taxon
Brachiaria decumbensUrochloa decumbense0
Organ / stage
new (freshly collected) seedse5
Outcome
dormancye5
Qualifier
metabolic charactere5

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Urochloa decumbens
Urochloa decumbens · TaxonHarry Rose from South West Rocks, Australia · CC BY 2.0 · Wikimedia Commons ↗

Verbatim

e0

“The effect of light and temperature on germination of Brachiaria decumbens”

✓ located verbatim in the source · abstract, characters 0–74 · show in text ↑
e5

“The results suggest a metabolic character of dormancy in new (freshly collected) seeds”

✓ located verbatim in the source · abstract, characters 486–572 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

Brachiaria decumbens seeds show two types of dormancy.

Taxon
B. decumbensUrochloa decumbense6
Organ / stage
seedse6
Outcome
occurence of two types of dormancye6

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Urochloa decumbens
Urochloa decumbens · TaxonHarry Rose from South West Rocks, Australia · CC BY 2.0 · Wikimedia Commons ↗

Verbatim

e6

“confirm the occurence of two types of dormancy in B. decumbens seeds”

✓ located verbatim in the source · abstract, characters 577–645 · show in text ↑

sulfuric acid · growth · Urochloa decumbensPositive and negative results

5 papers: 3 positive, 2 negative or no effect

1 paper in the same direction as this paper · 3 in the opposite direction

  1. positive
  2. positive
  3. positive

1 paper more in this group

See all 5 papers →

potassium nitrate · growth · Urochloa decumbensResults agree

2 papers: 0 positive, 2 negative or no effect

1 paper in the same direction as this paper

  1. negative
See all 2 papers →

ethanol · growth · Urochloa decumbensResults agree

2 papers: 0 positive, 2 negative or no effect

1 paper in the same direction as this paper

  1. negative
See all 2 papers →

potassium cyanide · growth · Urochloa decumbensResults agree

2 papers: 2 positive, 0 negative or no effect

1 paper in the same direction as this paper

  1. positive
See all 2 papers →

hydrogen peroxide · growth · Urochloa decumbensResults agree

2 papers: 2 positive, 0 negative or no effect

1 paper in the same direction as this paper

  1. positive
See all 2 papers →

light · growth · Urochloa decumbensPositive and negative results

5 papers: 1 positive, 4 negative or no effect

3 papers in the same direction as this paper · 1 in the opposite direction

  1. positive
  2. no effect
  3. no effect

1 paper more in this group

See all 5 papers →

Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.