Paper · 1978 · Canadian Journal of Botany

Effect of either 2,4-dichlorophenoxyacetic acid or kinetin on production and composition of various fractions from extracellular polysaccharides produced by cotyledon cell suspension cultures of bush bean (Phaseolus vulgaris cv. Contender)

S. Mante; W. G. Boll

7
claims
13
verbatim quotes
2
citations
1
research areas
—
Not open access

Abstract

Cotyledon cell suspension cultures of bush bean required 2, 4-dichlorophenoxyacetic acid (2,4-D) for growth. Kinetin was not essential but was required for optimum growth. Both of the regulators were required for optimum production of extracellular polysaccharide (EP).The two regulators had different effects upon the production of three polysaccharide fractions (two pectins and a neutral polysaccharide) isolated from the EP at various stages of the culture cycle.The neutral sugar composition of the pectin fractions from all treatments, including regulator treatments, showed considerable fluctuation during the culture cycle and could be changed markedly by regulator treatments. Changes in composition of the neutral polysaccharide were slight. As a consequence of these results it is now possible to obtain cells differing in the nature of the systems synthesizing, or controlling the synthesis of, the polysaccharides.

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Claims 7

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

2,4-dichlorophenoxyacetic acid (2,4-D) was required for growth of bush bean cell suspension cultures.

Taxon
bush beane1
Treatment
2, 4-dichlorophenoxyacetic acid (2,4-D)e1
Outcome
growthe1

Not reportedComparatorDirection

Verbatim

e1

“Cotyledon cell suspension cultures of bush bean required 2, 4-dichlorophenoxyacetic acid (2,4-D) for growth”

✓ located verbatim in the source · abstract, characters 0–107 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Kinetin was not essential but was required for optimum growth of bush bean cell suspension cultures.

Taxon
bush beane1
Treatment
Kinetine2
Outcome
growthe2
Qualifier
not essentiale2

Not reportedComparatorDirection

Verbatim

e2

“Kinetin was not essential but was required for optimum growth”

✓ located verbatim in the source · abstract, characters 109–170 · show in text ↑
e1

“Cotyledon cell suspension cultures of bush bean”

✓ located verbatim in the source · abstract, characters 0–47 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Both regulators were required for optimum production of extracellular polysaccharide.

Taxon
bush beane1
Treatment
Both of the regulatorse3
Outcome
production of extracellular polysaccharidee3

Not reportedComparatorDirection

Verbatim

e3

“Both of the regulators were required for optimum production of extracellular polysaccharide (EP)”

✓ located verbatim in the source · abstract, characters 172–268 · show in text ↑
e1

“Cotyledon cell suspension cultures of bush bean”

✓ located verbatim in the source · abstract, characters 0–47 · show in text ↑
Intervention effectobservedoriginal resultmeasured

Claim · model-written summary

The two regulators had different effects on production of three polysaccharide fractions (two pectins and a neutral polysaccharide).

Taxon
bush beane1
Treatment
The two regulatorse4
Outcome
production of three polysaccharide fractionse4
Qualifier
two pectins and a neutral polysaccharidee4

Not reportedComparatorDirection

Verbatim

e4

“The two regulators had different effects upon the production of three polysaccharide fractions (two pectins and a neutral polysaccharide)”

✓ located verbatim in the source · abstract, characters 269–406 · show in text ↑
e1

“Cotyledon cell suspension cultures of bush bean”

✓ located verbatim in the source · abstract, characters 0–47 · show in text ↑
Observationobservedoriginal resultmixedmeasured

Claim · model-written summary

Neutral sugar composition of the pectin fractions fluctuated considerably during the culture cycle.

Taxon
bush beane1
Outcome
neutral sugar composition of the pectin fractionse5
Qualifier
during the culture cyclee5

Verbatim

e5

“The neutral sugar composition of the pectin fractions from all treatments, including regulator treatments, showed considerable fluctuation during the culture cycle and could be changed markedly by regulator treatments”

✓ located verbatim in the source · abstract, characters 467–684 · show in text ↑
e1

“Cotyledon cell suspension cultures of bush bean”

✓ located verbatim in the source · abstract, characters 0–47 · show in text ↑
Intervention effectobservedoriginal resultmeasured

Claim · model-written summary

Regulator treatments could change the neutral sugar composition of the pectin fractions markedly.

Taxon
bush beane1
Treatment
regulator treatmentse5
Outcome
neutral sugar composition of the pectin fractionse5
Direction
changed markedlye5

Not reportedComparator

Verbatim

e5

“The neutral sugar composition of the pectin fractions from all treatments, including regulator treatments, showed considerable fluctuation during the culture cycle and could be changed markedly by regulator treatments”

✓ located verbatim in the source · abstract, characters 467–684 · show in text ↑
e1

“Cotyledon cell suspension cultures of bush bean”

✓ located verbatim in the source · abstract, characters 0–47 · show in text ↑
Observationobservedoriginal resultno effectmeasured

Claim · model-written summary

Changes in composition of the neutral polysaccharide were slight.

Taxon
bush beane1
Outcome
composition of the neutral polysaccharidee6

Verbatim

e6

“Changes in composition of the neutral polysaccharide were slight”

✓ located verbatim in the source · abstract, characters 686–750 · show in text ↑
e1

“Cotyledon cell suspension cultures of bush bean”

✓ located verbatim in the source · abstract, characters 0–47 · show in text ↑

2,4-D · growth · Phaseolus vulgaris (common bean)Results differ

18 papers: 9 positive, 9 negative or no effect

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

  1. negative
    Only 2,4-D changed chloroplast morphology and internal structure after 24 h, and only in light.

    The Effect of 2,4-Dichlorophenoxyacetic Acid and Related Compounds on the Fine Structure of the Primary Leaves ofPhaseolus vulgaris · 1970 · compared with 2-chlorophenoxyacetic acid (2-CPA), 4-chlorophenoxyacetic acid (4-CPA), 2,6-dichlorophenoxyacetic acid (2,6-D)

    Opposite direction

  2. negative
  3. negative

14 papers more in this group

See all 18 papers →

kinetin · growth · Phaseolus vulgaris (common bean)Positive and negative results

9 papers: 6 positive, 3 negative or no effect

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

  1. negative
  2. negative
  3. no effect

5 papers more in this group

See all 9 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.