Abstract
Logarithmic growth rates (either fresh or dry weight basis) of tobacco callus tissues grown on 10(-4) to 10(-1) mum cytokinin are increased if gibberellic acid (10(-3)-2 mum) is incorporated into the medium. At higher (1-10 mum) cytokinin concentrations gibberellic acid has little effect on growth rate but extends the duration of logarithmic growth. The gibberellic acid effect is noticeable only after one weight doubling, is dependent on concentration, and occurs when either glucose or sucrose is used as carbon source. The gibberellic acid response includes a decrease in percentage of dry weight relative to control tissues. The maximum dry weight yield, although achieved sooner than controls, does not differ appreciably from yields of tissue not treated with gibberellic acid.
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Claims 9
Claim · model-written summary
Logarithmic growth rate of tobacco callus tissue grown on 10(-4) to 10(-1) mum cytokinin increased when gibberellic acid was incorporated into the medium.
- Taxon
- tobacco
Nicotiana tabacume1 - Organ / stage
- callus tissuese1
- Treatment
- gibberellic acid (10(-3)-2 mum)e1
- Outcome
- Logarithmic growth ratese1
- Direction
- increasede1
- Qualifier
- 10(-4) to 10(-1) mum cytokinine1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Logarithmic growth rates (either fresh or dry weight basis) of tobacco callus tissues grown on 10(-4) to 10(-1) mum cytokinin are increased if gibberellic acid (10(-3)-2 mum) is incorporated into the medium”
Claim · model-written summary
At higher (1-10 mum) cytokinin concentrations gibberellic acid has little effect on growth rate of tobacco callus.
- Taxon
- tobaccoNicotiana tabacume1
- Treatment
- gibberellic acide2
- Outcome
- growth ratee2
- Direction
- little effecte2
- Qualifier
- higher (1-10 mum) cytokinin concentrationse2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Logarithmic growth rates (either fresh or dry weight basis) of tobacco callus tissues grown on 10(-4) to 10(-1) mum cytokinin are increased if gibberellic acid (10(-3)-2 mum) is incorporated into the medium”
e2“At higher (1-10 mum) cytokinin concentrations gibberellic acid has little effect on growth rate”
Claim · model-written summary
At higher (1-10 mum) cytokinin concentrations gibberellic acid extends the duration of logarithmic growth of tobacco callus.
- Taxon
- tobaccoNicotiana tabacume1
- Treatment
- gibberellic acide2
- Outcome
- duration of logarithmic growthe3
- Direction
- extendse3
- Qualifier
- higher (1-10 mum) cytokinin concentrationse2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Logarithmic growth rates (either fresh or dry weight basis) of tobacco callus tissues grown on 10(-4) to 10(-1) mum cytokinin are increased if gibberellic acid (10(-3)-2 mum) is incorporated into the medium”
e2“At higher (1-10 mum) cytokinin concentrations gibberellic acid has little effect on growth rate”
e3“but extends the duration of logarithmic growth”
Claim · model-written summary
The gibberellic acid effect on tobacco callus growth is noticeable only after one weight doubling.
- Taxon
- tobaccoNicotiana tabacume1
- Outcome
- gibberellic acid effecte4
- Qualifier
- only after one weight doublinge4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Logarithmic growth rates (either fresh or dry weight basis) of tobacco callus tissues grown on 10(-4) to 10(-1) mum cytokinin are increased if gibberellic acid (10(-3)-2 mum) is incorporated into the medium”
e4“The gibberellic acid effect is noticeable only after one weight doubling, is dependent on concentration, and occurs when either glucose or sucrose is used as carbon source”
Claim · model-written summary
The gibberellic acid effect on tobacco callus growth depends on gibberellic acid concentration.
- Taxon
- tobaccoNicotiana tabacume1
- Treatment
- gibberellic acide4
- Outcome
- gibberellic acid effecte4
- Qualifier
- is dependent on concentratione4
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Logarithmic growth rates (either fresh or dry weight basis) of tobacco callus tissues grown on 10(-4) to 10(-1) mum cytokinin are increased if gibberellic acid (10(-3)-2 mum) is incorporated into the medium”
e4“The gibberellic acid effect is noticeable only after one weight doubling, is dependent on concentration, and occurs when either glucose or sucrose is used as carbon source”
Claim · model-written summary
The gibberellic acid effect on tobacco callus growth occurs when glucose or sucrose is the carbon source.
- Taxon
- tobaccoNicotiana tabacume1
- Treatment
- glucose or sucrosee4
- Outcome
- gibberellic acid effecte4
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Logarithmic growth rates (either fresh or dry weight basis) of tobacco callus tissues grown on 10(-4) to 10(-1) mum cytokinin are increased if gibberellic acid (10(-3)-2 mum) is incorporated into the medium”
e4“The gibberellic acid effect is noticeable only after one weight doubling, is dependent on concentration, and occurs when either glucose or sucrose is used as carbon source”
Claim · model-written summary
The gibberellic acid response of tobacco callus includes a decrease in percentage of dry weight relative to control tissues.
- Taxon
- tobaccoNicotiana tabacume1
- Treatment
- gibberellic acide5
- Outcome
- percentage of dry weighte5
- Direction
- decreasee5
- Comparator
- control tissuese5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Logarithmic growth rates (either fresh or dry weight basis) of tobacco callus tissues grown on 10(-4) to 10(-1) mum cytokinin are increased if gibberellic acid (10(-3)-2 mum) is incorporated into the medium”
e5“The gibberellic acid response includes a decrease in percentage of dry weight relative to control tissues”
Claim · model-written summary
With gibberellic acid the maximum dry weight yield of tobacco callus was reached sooner than in controls.
- Taxon
- tobaccoNicotiana tabacume1
- Treatment
- gibberellic acide6
- Outcome
- maximum dry weight yielde6
- Direction
- achieved soonere6
- Comparator
- controlse6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Logarithmic growth rates (either fresh or dry weight basis) of tobacco callus tissues grown on 10(-4) to 10(-1) mum cytokinin are increased if gibberellic acid (10(-3)-2 mum) is incorporated into the medium”
e6“The maximum dry weight yield, although achieved sooner than controls, does not differ appreciably from yields of tissue not treated with gibberellic acid”
Claim · model-written summary
The maximum dry weight yield of gibberellic acid-treated tobacco callus does not differ appreciably from untreated tissue.
- Taxon
- tobaccoNicotiana tabacume1
- Treatment
- gibberellic acide6
- Outcome
- maximum dry weight yielde6
- Direction
- does not differ appreciablye6
- Comparator
- yields of tissue not treated with gibberellic acide6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Logarithmic growth rates (either fresh or dry weight basis) of tobacco callus tissues grown on 10(-4) to 10(-1) mum cytokinin are increased if gibberellic acid (10(-3)-2 mum) is incorporated into the medium”
e6“The maximum dry weight yield, although achieved sooner than controls, does not differ appreciably from yields of tissue not treated with gibberellic acid”
The same questions in other papers
Gibberellic acid · yield · Nicotiana tabacum (tobacco)Positive and negative results
1 paper in the same direction as this paper · 1 reporting no difference from an alternative
- positive
- no effect
Gibberellic acid · growth · Nicotiana tabacum (tobacco)Positive and negative results
21 papers in the same direction as this paper · 2 in the opposite direction
- no effect
- negative
- positive
20 papers more in this group
See all 24 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.