Paper · 1964 · Plant and Cell Physiology

CHANGES IN THE AMOUNT OF GIBBERELLIN-LIKE SUBSTANCES IN THE SEEDLING OF PHARBITIS NIL WITH SPECIAL REFERENCE TO EXPANSION OF COTYLEDON

YUKIYOSHI OGAWA

14
claims
24
verbatim quotes
15
citations
2
research areas
—
Not open access

Abstract

Two gibberellin-like substances were separated chromatographically from the ethanol-extract of germinating cotyledons of Pharbitis nil. In the dark-grown seedling, these substances in the cotyledon increased in amount gradually with the slow increase in fresh weight and area of the tissue, and attained, 4 days after sowing, a maximum level of 0.03 μg gibberellin A3 equivalent per a couple of cotyledon; in the light-grown seedling, they increased rapidly with the rapid increase in the fresh weight and area, and attained a maximum content of 0.07 μg gibberellin A3 equivalent per cotyledon on the 6th day. When the etiolated seedling was exposed to light, the amount of the gibberellin-like substances in the cotyledon increased in parallel with opening of the hypccotyl hook and expansion of the cotyledon. The opening of the hook and increase of the substances occurred in red light as well as in far-red. Relatively small amounts of the gibberellin-like substances were also contained in the germinating hypocotyl and root. The growth of cotyledonary disks was promoted by gibberellin A3 and the gibberellin-like substances from the expanding cotyledon. The dwarf rice seedling and dwarfs 1, 3 and 5 of maize responded to the gibberellin-like substances, but dwarf Pharbitis did not.

Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗

The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.

Claims 14

Observationobservedoriginal resultmeasured

Claim · model-written summary

Two gibberellin-like substances were separated from germinating Pharbitis cotyledons.

Taxon
Pharbitis nilIpomoea nile0
Organ / stage
germinating cotyledonse0
Outcome
Two gibberellin-like substancese0

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

Ipomoea nil
Ipomoea nil · TaxonKENPEI · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“Two gibberellin-like substances were separated chromatographically from the ethanol-extract of germinating cotyledons of Pharbitis nil”

✓ located verbatim in the source · abstract, characters 0–134 · show in text ↑
Observationobservedoriginal resultpositivemeasured

Claim · model-written summary

In dark-grown seedlings, cotyledon gibberellin-like substances increased gradually and peaked four days after sowing at 0.03 μg gibberellin A3 equivalent per pair.

Taxon
Pharbitis nilIpomoea nilt0
Organ / stage
cotyledone0
Outcome
these substances in the cotyledone0
Direction
increasede0
Value
0.03 μg gibberellin A3 equivalent per a couple of cotyledone0
Qualifier
4 days after sowinge0

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

Ipomoea nil
Ipomoea nil · TaxonKENPEI · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“In the dark-grown seedling, these substances in the cotyledon increased in amount gradually with the slow increase in fresh weight and area of the tissue, and attained, 4 days after sowing, a maximum level of 0.03 μg gibberellin A3 equivalent per a couple of cotyledon”

✓ located verbatim in the source · abstract, characters 136–404 · show in text ↑
t0

“PHARBITIS NIL”

✓ located verbatim in the source · title, characters 72–85 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

Dark-grown cotyledon fresh weight and area rose slowly.

Taxon
Pharbitis nilIpomoea nilt0
Organ / stage
cotyledone0
Outcome
fresh weight and area of the tissuee0
Direction
increasee0

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

Ipomoea nil
Ipomoea nil · TaxonKENPEI · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“In the dark-grown seedling, these substances in the cotyledon increased in amount gradually with the slow increase in fresh weight and area of the tissue”

✓ located verbatim in the source · abstract, characters 136–289 · show in text ↑
t0

“PHARBITIS NIL”

✓ located verbatim in the source · title, characters 72–85 · show in text ↑
Observationobservedoriginal resultpositivemeasured

Claim · model-written summary

In light-grown seedlings, cotyledon gibberellin-like substances rose rapidly and peaked on day six at 0.07 μg gibberellin A3 equivalent per cotyledon.

Taxon
Pharbitis nilIpomoea nilt0
Organ / stage
cotyledone0
Outcome
theye0
Direction
increasede0
Value
0.07 μg gibberellin A3 equivalent per cotyledone0
Qualifier
on the 6th daye0

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

Ipomoea nil
Ipomoea nil · TaxonKENPEI · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“in the light-grown seedling, they increased rapidly with the rapid increase in the fresh weight and area, and attained a maximum content of 0.07 μg gibberellin A3 equivalent per cotyledon on the 6th day”

✓ located verbatim in the source · abstract, characters 406–608 · show in text ↑
t0

“PHARBITIS NIL”

✓ located verbatim in the source · title, characters 72–85 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

Light-grown cotyledon fresh weight and area rose rapidly.

Taxon
Pharbitis nilIpomoea nilt0
Organ / stage
cotyledone0
Outcome
fresh weight and areae0
Direction
increasee0

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

Ipomoea nil
Ipomoea nil · TaxonKENPEI · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“cotyledon; in the light-grown seedling, they increased rapidly with the rapid increase in the fresh weight and area”

✓ located verbatim in the source · abstract, characters 395–510 · show in text ↑
t0

“PHARBITIS NIL”

✓ located verbatim in the source · title, characters 72–85 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Light exposure increased gibberellin-like substances in etiolated cotyledons alongside hook opening and cotyledon expansion.

Taxon
Pharbitis nilIpomoea nilt0
Treatment
exposed to lighte0
Outcome
amount of the gibberellin-like substances in the cotyledone0
Direction
increasede0
Qualifier
in parallel with opening of the hypccotyl hook and expansion of the cotyledone0

Not reportedComparator

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

Ipomoea nil
Ipomoea nil · TaxonKENPEI · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“When the etiolated seedling was exposed to light, the amount of the gibberellin-like substances in the cotyledon increased in parallel with opening of the hypccotyl hook and expansion of the cotyledon”

✓ located verbatim in the source · abstract, characters 610–810 · show in text ↑
t0

“PHARBITIS NIL”

✓ located verbatim in the source · title, characters 72–85 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Red light induced hook opening and increased gibberellin-like substances.

Taxon
Pharbitis nilIpomoea nilt0
Treatment
red lighte0
Outcome
opening of the hook and increase of the substancese0
Direction
increasee0

Not reportedComparator

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

Ipomoea nil
Ipomoea nil · TaxonKENPEI · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“The opening of the hook and increase of the substances occurred in red light as well as in far-red”

✓ located verbatim in the source · abstract, characters 812–910 · show in text ↑
t0

“PHARBITIS NIL”

✓ located verbatim in the source · title, characters 72–85 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Far-red light induced hook opening and increased gibberellin-like substances.

Taxon
Pharbitis nilIpomoea nilt0
Treatment
far-rede0
Outcome
opening of the hook and increase of the substancese0
Direction
increasee0

Not reportedComparator

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

Ipomoea nil
Ipomoea nil · TaxonKENPEI · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“The opening of the hook and increase of the substances occurred in red light as well as in far-red”

✓ located verbatim in the source · abstract, characters 812–910 · show in text ↑
t0

“PHARBITIS NIL”

✓ located verbatim in the source · title, characters 72–85 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

Germinating Pharbitis hypocotyl and root contained relatively small amounts of gibberellin-like substances.

Taxon
Pharbitis nilIpomoea nilt0
Organ / stage
germinating hypocotyl and roote0
Outcome
gibberellin-like substancese0
Direction
Relatively small amountse0

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

Ipomoea nil
Ipomoea nil · TaxonKENPEI · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“Relatively small amounts of the gibberellin-like substances were also contained in the germinating hypocotyl and root”

✓ located verbatim in the source · abstract, characters 912–1029 · show in text ↑
t0

“PHARBITIS NIL”

✓ located verbatim in the source · title, characters 72–85 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Gibberellin A3 promoted cotyledonary disk growth.

Taxon
Pharbitis nilIpomoea nilt0
Treatment
gibberellin A3e0
Outcome
growth of cotyledonary diskse0
Direction
promotede0

Not reportedComparator

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

Ipomoea nil
Ipomoea nil · TaxonKENPEI · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“The growth of cotyledonary disks was promoted by gibberellin A3 and the gibberellin-like substances from the expanding cotyledon”

✓ located verbatim in the source · abstract, characters 1031–1159 · show in text ↑
t0

“PHARBITIS NIL”

✓ located verbatim in the source · title, characters 72–85 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Gibberellin-like substances from expanding cotyledons promoted cotyledonary disk growth.

Taxon
Pharbitis nilIpomoea nilt0
Treatment
gibberellin-like substances from the expanding cotyledone0
Outcome
growth of cotyledonary diskse0
Direction
promotede0

Not reportedComparator

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

Ipomoea nil
Ipomoea nil · TaxonKENPEI · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“The growth of cotyledonary disks was promoted by gibberellin A3 and the gibberellin-like substances from the expanding cotyledon”

✓ located verbatim in the source · abstract, characters 1031–1159 · show in text ↑
t0

“PHARBITIS NIL”

✓ located verbatim in the source · title, characters 72–85 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Dwarf rice seedlings responded to the gibberellin-like substances.

Material
dwarf rice seedlinge0
Treatment
gibberellin-like substancese0
Outcome
respondede0

Not reportedComparatorDirection

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

Oryza sativa
Oryza sativa · Taxon · picture from its Wikimedia Commons categoryDesmanthus4food · CC BY-SA 3.0 us · Wikimedia Commons ↗

Verbatim

e0

“The dwarf rice seedling and dwarfs 1, 3 and 5 of maize responded to the gibberellin-like substances”

✓ located verbatim in the source · abstract, characters 1161–1260 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Maize dwarfs 1, 3 and 5 responded to the gibberellin-like substances.

Taxon
maizeZea mayse0
Material
dwarfs 1, 3 and 5e0
Treatment
gibberellin-like substancese0
Outcome
respondede0

Not reportedComparatorDirection

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

Zea mays
Zea mays · TaxonAkwugo · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“The dwarf rice seedling and dwarfs 1, 3 and 5 of maize responded to the gibberellin-like substances”

✓ located verbatim in the source · abstract, characters 1161–1260 · show in text ↑
Intervention effectobservedoriginal resultno effectmeasured

Claim · model-written summary

Dwarf Pharbitis did not respond to the gibberellin-like substances.

Taxon
PharbitisIpomoeae0
Material
dwarf Pharbitise0
Outcome
did note0

Not reportedTreatmentComparatorDirection

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

Ipomoea
Ipomoea · Taxon · picture of the genus (one of its species)Tauʻolunga · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“but dwarf Pharbitis did not”

✓ located verbatim in the source · abstract, characters 1262–1289 · show in text ↑

gibberellin A3 · growth · Ipomoea nil (Japanese morning glory)Results agree

3 papers: 3 positive, 0 negative or no effect

2 papers in the same direction as this paper

  1. positive
  2. positive
See all 3 papers →

class · growth · Ipomoea nil (Japanese morning glory)Positive and negative results

3 papers: 2 positive, 1 negative or no effect

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

  1. negative
  2. positive
See all 3 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.