Paper · 1971 · Physiologia Plantarum

Growth and Organogenesis in Tissue Cultures of Allium cepa var. proliferum

GUNNAR FRIDBORG

7
claims
14
verbatim quotes
66
citations
1
research areas
—
Not open access

Abstract

Abstract Callus isolated from aerial bulbs of Allium cepa var. proliferum was grown in agar and liquid cultures on a synthetic medium containing 5 × 10 −6 M 2,4‐D. Root formation occurred in the absence of 2,4‐D and was highly stimulated by 5 × 10 −6 M NAA. Cytokinin was not necessary for growth and organ formation but slightly stimulated the formation of leafy buds. Combinations of NAA or IAA and cytokinin stimulated growth and root formation to a greater extent than anyone of these substances added alone. Pieces of callus in liquid culture developed roots in one week in root‐inducing medium, but bud or embryo formation was not observed in liquid cultures.

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Claims 7

Observationobservedoriginal resultpositivemeasured

Claim · model-written summary

Roots formed without 2,4‐D.

Taxon
Allium cepa var. proliferumAllium cepat0
Treatment
absence of 2,4‐De0
Outcome
Root formatione0

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

Allium cepa
Allium cepa · TaxonMehdi · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“Root formation occurred in the absence of 2,4‐D”

✓ located verbatim in the source · abstract, characters 164–211 · show in text ↑
t0

“Allium cepa var. proliferum”

✓ located verbatim in the source · title, characters 47–74 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

NAA strongly stimulated root formation.

Taxon
Allium cepa var. proliferumAllium cepat0
Treatment
5 × 10 −6 M NAAe0
Outcome
Root formatione0
Direction
highly stimulatede0

Not reportedComparator

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

Allium cepa
Allium cepa · TaxonMehdi · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“Root formation occurred in the absence of 2,4‐D and was highly stimulated by 5 × 10 −6 M NAA.”

✓ located verbatim in the source · abstract, characters 164–257 · show in text ↑
t0

“Allium cepa var. proliferum”

✓ located verbatim in the source · title, characters 47–74 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

Cytokinin was unnecessary for growth and organ formation.

Taxon
Allium cepa var. proliferumAllium cepat0
Treatment
Cytokinine0
Outcome
not necessary for growth and organ formatione0

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

Allium cepa
Allium cepa · TaxonMehdi · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“Cytokinin was not necessary for growth and organ formation”

✓ located verbatim in the source · abstract, characters 258–316 · show in text ↑
t0

“Allium cepa var. proliferum”

✓ located verbatim in the source · title, characters 47–74 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Cytokinin slightly stimulated leafy bud formation.

Taxon
Allium cepa var. proliferumAllium cepat0
Treatment
Cytokinine0
Outcome
formation of leafy budse0
Direction
slightly stimulatede0

Not reportedComparator

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

Allium cepa
Allium cepa · TaxonMehdi · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“Cytokinin was not necessary for growth and organ formation but slightly stimulated the formation of leafy buds.”

✓ located verbatim in the source · abstract, characters 258–369 · show in text ↑
t0

“Allium cepa var. proliferum”

✓ located verbatim in the source · title, characters 47–74 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

NAA plus cytokinin stimulated growth and roots more than either alone.

Taxon
Allium cepa var. proliferumAllium cepat0
Treatment
NAA or IAA and cytokinine0
Outcome
growth and root formatione0
Direction
to a greater extente0
Comparator
anyone of these substances added alonee0

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

Allium cepa
Allium cepa · TaxonMehdi · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“Combinations of NAA or IAA and cytokinin stimulated growth and root formation to a greater extent than anyone of these substances added alone.”

✓ located verbatim in the source · abstract, characters 370–512 · show in text ↑
t0

“Allium cepa var. proliferum”

✓ located verbatim in the source · title, characters 47–74 · show in text ↑
Observationobservedoriginal resultpositivemeasured

Claim · model-written summary

Callus developed roots within one week in root inducing liquid culture.

Taxon
Allium cepa var. proliferumAllium cepat0
Outcome
developed rootse0
Value
one weeke0
Setting
liquid culturee0

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

Allium cepa
Allium cepa · TaxonMehdi · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“Pieces of callus in liquid culture developed roots in one week in root‐inducing medium”

✓ located verbatim in the source · abstract, characters 513–599 · show in text ↑
t0

“Allium cepa var. proliferum”

✓ located verbatim in the source · title, characters 47–74 · show in text ↑
Observationobservedoriginal resultnegativemeasured

Claim · model-written summary

Liquid cultures did not form buds or embryos.

Taxon
Allium cepa var. proliferumAllium cepat0
Outcome
bud or embryo formation was not observede0
Setting
liquid culturese0

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

Allium cepa
Allium cepa · TaxonMehdi · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“bud or embryo formation was not observed in liquid cultures”

✓ located verbatim in the source · abstract, characters 605–664 · show in text ↑
t0

“Allium cepa var. proliferum”

✓ located verbatim in the source · title, characters 47–74 · show in text ↑

indole-3-acetic acid · growth · Allium cepa (onion)Positive and negative results

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1-naphthaleneacetic acid · growth · Allium cepa (onion)Positive and negative results

13 papers: 10 positive, 3 negative or no effect

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

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class · growth · Allium cepa (onion)Positive and negative results

21 papers: 14 positive, 7 negative or no effect

13 papers in the same direction as this paper · 5 in the opposite direction · 2 reporting no difference from an alternative

  1. no effect
  2. no effect
  3. negative

17 papers more in this group

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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.