Abstract
The short term growth response of etiolated pea stem segments (Pisum sativum L., var. Alaska) was investigated with the use of a high resolution growth-recording device. The immediate effect of treatment with indole-3-acetic acid is an inhibition of growth. This inhibition lasts about 10 minutes, and then the rate of elongation rises abruptly to a new steady rate about 4 times the rate of elongation before auxin treatment. This rapid steady rate of elongation, however, continues for only about 25 minutes before declining suddenly to a lower steady rate of growth about 2 times the rate of elongation before the addition of auxin. Pretreatment of the segments with cycloheximide or actinomycin strongly inhibits both phases of auxin-promoted elongation without altering the length of the latent period in response to the hormone.
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Claims 8
Claim · model-written summary
Indole-3-acetic acid initially inhibited pea stem growth.
- Taxon
- Pea
Lathyrus oleraceust0 - Treatment
- indole-3-acetic acide0
- Outcome
- growthe0
- Direction
- inhibitione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The immediate effect of treatment with indole-3-acetic acid is an inhibition of growth”
t0“Pea Stem”
Claim · model-written summary
The initial inhibition lasted about 10 minutes.
- Taxon
- PeaLathyrus oleraceust0
- Outcome
- inhibitione0
- Value
- about 10 minutese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This inhibition lasts about 10 minutes”
t0“Pea Stem”
Claim · model-written summary
Elongation then reached about four times its pre-auxin rate.
- Taxon
- PeaLathyrus oleraceust0
- Treatment
- auxin treatmente0
- Outcome
- rate of elongatione0
- Direction
- risese0
- Value
- about 4 timese0
- Comparator
- rate of elongation before auxin treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“rate of elongation rises abruptly to a new steady rate about 4 times the rate of elongation before auxin treatment”
t0“Pea Stem”
Claim · model-written summary
The rapid elongation phase lasted about 25 minutes.
- Taxon
- PeaLathyrus oleraceust0
- Outcome
- rapid steady rate of elongatione0
- Value
- about 25 minutese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This rapid steady rate of elongation, however, continues for only about 25 minutes”
t0“Pea Stem”
Claim · model-written summary
The later steady growth rate was about twice the pre-auxin rate.
- Taxon
- PeaLathyrus oleraceust0
- Treatment
- auxine0
- Outcome
- rate of growthe0
- Direction
- lowere0
- Value
- about 2 timese0
- Comparator
- rate of elongation before the addition of auxine0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“declining suddenly to a lower steady rate of growth about 2 times the rate of elongation before the addition of auxin”
t0“Pea Stem”
Claim · model-written summary
Cycloheximide pretreatment inhibited both auxin-promoted elongation phases.
- Taxon
- PeaLathyrus oleraceust0
- Treatment
- cycloheximidee0
- Outcome
- both phases of auxin-promoted elongatione0
- Direction
- inhibitse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Pretreatment of the segments with cycloheximide or actinomycin strongly inhibits both phases of auxin-promoted elongation”
t0“Pea Stem”
Claim · model-written summary
Actinomycin pretreatment inhibited both auxin-promoted elongation phases.
- Taxon
- PeaLathyrus oleraceust0
- Treatment
- actinomycine0
- Outcome
- both phases of auxin-promoted elongatione0
- Direction
- inhibitse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Pretreatment of the segments with cycloheximide or actinomycin strongly inhibits both phases of auxin-promoted elongation”
t0“Pea Stem”
Claim · model-written summary
Inhibitor pretreatment did not alter the auxin-response latent period.
- Taxon
- PeaLathyrus oleraceust0
- Treatment
- cycloheximide or actinomycine0
- Outcome
- length of the latent periode0
- Direction
- without alteringe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Pretreatment of the segments with cycloheximide or actinomycin strongly inhibits both phases of auxin-promoted elongation without altering the length of the latent period in response to the hormone”
t0“Pea Stem”
The same questions in other papers
indole-3-acetic acid · growth · Lathyrus oleraceus (pea)Results differ
13 papers in the same direction as this paper · 33 in the opposite direction
- positive
- positive
- positive
43 papers more in this group
See all 47 papers →cycloheximide · disease · Lathyrus oleraceus (pea)Results agree
1 paper in the same direction as this paper
- negative
cycloheximide · physiology: hormones · Lathyrus oleraceus (pea)Results agree
3 papers in the same direction as this paper
- negative
- negative
- negative
class · growth · Lathyrus oleraceus (pea)Positive and negative results
21 papers in the same direction as this paper · 15 in the opposite direction
- no effect
- negative
- no effect
33 papers more in this group
See all 37 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.