Abstract
Tissue cultures of Allium cepa var. proliferum grown in liquid medium were treated with a cytokinin, 6-(3-methyl-2-buten-1-ylamino)-purine (2 iP) and α-naphthaleneacetic acid (NAA) in different concentrations. The formation and elongation of roots were stimulated by 2 iP, the optimum concentration of which varied with the age of the cultures. The mixoploid root tips of the control series showed a high percentage of polyploidy, but with 2 iP in the medium the cells were essentially 100% diploid. A similar effect was seen in cells of callus tissue. The effects of NAA were similar to those of cytokinin in that the root tip cells showed increasing diploidy to nearly 100% at the optimum concentration of 5 mg/l. However, in the NAA-treated series root formation and elongation were less pronounced than in the 2 iP-treated series.
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Claims 5
Claim · model-written summary
2 iP stimulated root formation and elongation in tissue cultures, with an optimum concentration that varied with culture age
- Taxon
- Allium cepa var. proliferum
Allium cepae1 - Treatment
- 2 iPe1
- Outcome
- formation and elongation of rootse2
- Direction
- stimulatede2
- Qualifier
- the optimum concentration of which varied with the age of the culturese2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Tissue cultures of Allium cepa var. proliferum grown in liquid medium were treated with a cytokinin, 6-(3-methyl-2-buten-1-ylamino)-purine (2 iP) and α-naphthaleneacetic acid (NAA) in different concentrations”
e2“The formation and elongation of roots were stimulated by 2 iP, the optimum concentration of which varied with the age of the cultures”
Claim · model-written summary
NAA gave less pronounced root formation and elongation than 2 iP
- Taxon
- Allium cepa var. proliferumAllium cepae1
- Treatment
- NAAe1
- Outcome
- root formation and elongatione3
- Direction
- less pronouncede3
- Comparator
- 2 iP-treated seriese3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Tissue cultures of Allium cepa var. proliferum grown in liquid medium were treated with a cytokinin, 6-(3-methyl-2-buten-1-ylamino)-purine (2 iP) and α-naphthaleneacetic acid (NAA) in different concentrations”
e3“However, in the NAA-treated series root formation and elongation were less pronounced than in the 2 iP-treated series”
Claim · model-written summary
With 2 iP, root-tip cells were essentially 100% diploid, whereas controls showed a high percentage of polyploidy
- Taxon
- Allium cepa var. proliferumAllium cepae1
- Organ / stage
- root tipse4
- Treatment
- 2 iPe4
- Outcome
- percentage of polyploidye4
- Direction
- decreaseinferrede4
- Value
- 100%e4
- Comparator
- control seriese4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Tissue cultures of Allium cepa var. proliferum grown in liquid medium were treated with a cytokinin, 6-(3-methyl-2-buten-1-ylamino)-purine (2 iP) and α-naphthaleneacetic acid (NAA) in different concentrations”
e4“The mixoploid root tips of the control series showed a high percentage of polyploidy, but with 2 iP in the medium the cells were essentially 100% diploid”
Claim · model-written summary
2 iP had a similar effect on ploidy of callus tissue cells
- Taxon
- Allium cepa var. proliferumAllium cepae1
- Organ / stage
- cells of callus tissuee5
- Treatment
- 2 iPe1
- Outcome
- similar effecte5
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Tissue cultures of Allium cepa var. proliferum grown in liquid medium were treated with a cytokinin, 6-(3-methyl-2-buten-1-ylamino)-purine (2 iP) and α-naphthaleneacetic acid (NAA) in different concentrations”
e5“A similar effect was seen in cells of callus tissue”
Claim · model-written summary
NAA increased root-tip cell diploidy to nearly 100% at 5 mg/l, similar to cytokinin
- Taxon
- Allium cepa var. proliferumAllium cepae1
- Organ / stage
- root tip cellse6
- Treatment
- NAAe1
- Outcome
- diploidye6
- Direction
- increasinge6
- Value
- nearly 100%e6
- Qualifier
- at the optimum concentration of 5 mg/le6
- Comparator
- cytokinine6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Tissue cultures of Allium cepa var. proliferum grown in liquid medium were treated with a cytokinin, 6-(3-methyl-2-buten-1-ylamino)-purine (2 iP) and α-naphthaleneacetic acid (NAA) in different concentrations”
e6“The effects of NAA were similar to those of cytokinin in that the root tip cells showed increasing diploidy to nearly 100% at the optimum concentration of 5 mg/l”
The same questions in other papers
1-naphthaleneacetic acid · growth · Allium cepa (onion)Positive and negative results
2 papers in the same direction as this paper · 10 in the opposite direction
- positive
- positive
- positive
9 papers more in this group
See all 13 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.