Abstract
Pea seeds were swollen in solutions with different concentrations of cytokinin benzyladenine (BA). As compared with controls, a low concentration of BA (0.05 mg/l) did not affect the growth of stems and roots of twelve-day-old seedlings but concentrations of 0.20-4.00 mg/l showed an inhibiting effect; this inhibition was proportional to the concentration of BA. In controls the ratio between the lengths of stems and roots was equal to 1.14, while in seedlings influenced by BA in concentration of 0.20 mg/l its value was significantly lowered to 0.91. Also in six-day-old pea seedlings cultivated under in vitro conditions, BA concentrations of 0.70 and 3.30 mg/l inhibited the growth of roots and epicotyls and significantly increased the production of ethylene (by 150 and 330%, respectively). Three hours after the amputation of the root of five-day-old pea seedlings the level of cytokinin trans-zeatin increased in the apical part of the stem. Within the interval of 48 hours after the amputation of the root the concentration of this plant hormone gradually decreased again. The initial increase in the zeatin level in the stem indicates that the absence of the root induces a reduction of growth-inhibiting effects of roots, which negatively influences the zeatin level in the stem apex at the beginning of germination.
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Claims 7
Claim · model-written summary
A low concentration of BA (0.05 mg/l) did not affect growth of stems and roots of twelve-day-old pea seedlings compared with controls.
- Taxon
- Pea
Lathyrus oleraceuse0 - Treatment
- a low concentration of BA (0.05 mg/l)e1
- Outcome
- growthe1
- Direction
- did not affecte1
- Comparator
- controlse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“As compared with controls, a low concentration of BA (0.05 mg/l) did not affect the growth of stems and roots of twelve-day-old seedlings”
e0“Pea seeds were swollen in solutions with different concentrations of cytokinin benzyladenine (BA)”
Claim · model-written summary
BA concentrations of 0.20-4.00 mg/l inhibited pea seedling growth in proportion to concentration.
- Taxon
- PeaLathyrus oleraceuse0
- Treatment
- concentrations of 0.20-4.00 mg/le2
- Outcome
- growthe1
- Direction
- inhibitinge2
- Comparator
- controlse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“but concentrations of 0.20-4.00 mg/l showed an inhibiting effect; this inhibition was proportional to the concentration of BA”
e1“As compared with controls, a low concentration of BA (0.05 mg/l) did not affect the growth of stems and roots of twelve-day-old seedlings”
e0“Pea seeds were swollen in solutions with different concentrations of cytokinin benzyladenine (BA)”
Claim · model-written summary
BA at 0.20 mg/l significantly lowered the stem-to-root length ratio of pea seedlings to 0.91, from 1.14 in controls.
- Taxon
- PeaLathyrus oleraceuse0
- Treatment
- BA in concentration of 0.20 mg/le3
- Outcome
- ratio between the lengths of stems and rootse3
- Direction
- lowerede3
- Value
- 0.91e3
- Qualifier
- equal to 1.14e3
- Comparator
- controlse3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“In controls the ratio between the lengths of stems and roots was equal to 1.14, while in seedlings influenced by BA in concentration of 0.20 mg/l its value was significantly lowered to 0.91”
e0“Pea seeds were swollen in solutions with different concentrations of cytokinin benzyladenine (BA)”
Claim · model-written summary
BA at 0.70 and 3.30 mg/l inhibited growth of roots and epicotyls of six-day-old pea seedlings.
- Taxon
- PeaLathyrus oleraceuse0
- Treatment
- BA concentrations of 0.70 and 3.30 mg/le4
- Outcome
- growth of roots and epicotylse4
- Direction
- inhibitede4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“BA concentrations of 0.70 and 3.30 mg/l inhibited the growth of roots and epicotyls and significantly increased the production of ethylene (by 150 and 330%, respectively)”
e0“Pea seeds were swollen in solutions with different concentrations of cytokinin benzyladenine (BA)”
Claim · model-written summary
BA at 0.70 and 3.30 mg/l significantly increased ethylene production in six-day-old pea seedlings by 150 and 330%.
- Taxon
- PeaLathyrus oleraceuse0
- Treatment
- BA concentrations of 0.70 and 3.30 mg/le4
- Outcome
- production of ethylenee4
- Direction
- increasede4
- Value
- 150 and 330%e4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“BA concentrations of 0.70 and 3.30 mg/l inhibited the growth of roots and epicotyls and significantly increased the production of ethylene (by 150 and 330%, respectively)”
e0“Pea seeds were swollen in solutions with different concentrations of cytokinin benzyladenine (BA)”
Claim · model-written summary
Three hours after root amputation, trans-zeatin level increased in the apical part of the pea stem.
- Taxon
- peaLathyrus oleraceuse5
- Organ / stage
- apical part of the steme5
- Treatment
- amputation of the roote5
- Outcome
- level of cytokinin trans-zeatine5
- Direction
- increasede5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“Three hours after the amputation of the root of five-day-old pea seedlings the level of cytokinin trans-zeatin increased in the apical part of the stem”
e0“Pea seeds were swollen in solutions with different concentrations of cytokinin benzyladenine (BA)”
Claim · model-written summary
Within 48 hours after root amputation, the cytokinin concentration in the pea stem gradually decreased again.
- Taxon
- PeaLathyrus oleraceuse0
- Treatment
- amputation of the roote6
- Outcome
- concentration of this plant hormonee6
- Direction
- gradually decreasede6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“Within the interval of 48 hours after the amputation of the root the concentration of this plant hormone gradually decreased again”
e0“Pea seeds were swollen in solutions with different concentrations of cytokinin benzyladenine (BA)”
The same questions in other papers
N-benzyladenine · growth · Lathyrus oleraceus (pea)Positive and negative results
2 papers in the same direction as this paper · 13 in the opposite direction
- positive
- positive
- positive
12 papers more in this group
See all 16 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.