Abstract
This study was conducted to investigate the interaction effect of a new plant growth regulator brassinolide and auxins using several bioassay methods such as rice lamina inclination test, oat coleoptile segment growth test and radish hypocotyl elongation test. For rice lamina inclination test, the antagonistic response showed at low concentration combinations of homobrassinolide and auxins (IAA and 2,4-D), while the combinations of high concentration responsed mostly synergistic or additive effects, IAA was generally higher than 2,4-D for combination effect with homobrassinolide. For oat coleoptile segment growth test, the synergistic effect showed at IAA concentrations less than 0.1ppm while additive response exhibited above 0.3ppm regardless of homobrassinolide concentrations. In radish hypocotyl elongation test, the interaction response varied with cotyledon. The sections removed cotyledon showed mostly antagonistic effects, except for combination of homobrassinolide with IAA 3ppm. Interaction responses were Quite different from bioassay methods, particularly using experimental materials: antagonistic responses were usually shown at the section that attached growing point while these for sections that removed growing point were responded synergistic or additive effect due to unstable endogenous hormones.
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Claims 8
Claim · model-written summary
Low concentration combinations of homobrassinolide and auxins antagonized rice lamina inclination.
- Taxon
- rice
Oryza sativae0 - Treatment
- low concentration combinations of homobrassinolide and auxins (IAA and 2,4-D)e0
- Outcome
- rice lamina inclinatione0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“For rice lamina inclination test, the antagonistic response showed at low concentration combinations of homobrassinolide and auxins (IAA and 2,4-D)”
Claim · model-written summary
High concentration combinations mostly gave synergistic or additive rice responses.
- Taxon
- riceOryza sativae1
- Treatment
- combinations of high concentratione0
- Outcome
- synergistic or additive effectse0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the combinations of high concentration responsed mostly synergistic or additive effects”
e1“For rice lamina inclination test”
Claim · model-written summary
IAA had a greater combination effect with homobrassinolide than 2,4-D.
- Taxon
- riceOryza sativae1
- Treatment
- IAAe0
- Outcome
- combination effect with homobrassinolidee0
- Direction
- highere0
- Comparator
- 2,4-De0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“IAA was generally higher than 2,4-D for combination effect with homobrassinolide”
e1“For rice lamina inclination test”
Claim · model-written summary
IAA below 0.1ppm produced a synergistic oat coleoptile response.
- Taxon
- oat
Avena sativae0 - Treatment
- IAA concentrations less than 0.1ppme0
- Outcome
- oat coleoptile segment growthe0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“For oat coleoptile segment growth test, the synergistic effect showed at IAA concentrations less than 0.1ppm”
Claim · model-written summary
IAA above 0.3ppm produced an additive oat coleoptile response.
- Taxon
- oatAvena sativae1
- Treatment
- above 0.3ppme0
- Outcome
- additive responsee0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“additive response exhibited above 0.3ppm regardless of homobrassinolide concentrations”
e1“For oat coleoptile segment growth test”
Claim · model-written summary
Radish sections without cotyledons mostly showed antagonism, except with IAA 3ppm.
- Taxon
- radish
Raphanus sativuse1 - Outcome
- antagonistic effectse0
- Qualifier
- except for combination of homobrassinolide with IAA 3ppme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The sections removed cotyledon showed mostly antagonistic effects, except for combination of homobrassinolide with IAA 3ppm”
e1“In radish hypocotyl elongation test”
Claim · model-written summary
Sections with a growing point usually showed antagonistic responses.
- Taxon
- radishRaphanus sativuse1
- Organ / stage
- section that attached growing pointe0
- Outcome
- antagonistic responsese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“antagonistic responses were usually shown at the section that attached growing point”
e1“In radish hypocotyl elongation test”
Claim · model-written summary
Sections without a growing point showed synergistic or additive responses.
- Taxon
- radishRaphanus sativuse1
- Organ / stage
- sections that removed growing pointe0
- Outcome
- synergistic or additive effecte0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“sections that removed growing point were responded synergistic or additive effect”
e1“In radish hypocotyl elongation test”
The same questions in other papers
indole-3-acetic acid · growth · Avena sativa (oats)Results differ
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- no effect
- negative
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2,4-D · organism · Oryza sativa (rice)Positive and negative results
1 in the opposite direction
- positive
class · organism · Oryza sativa (rice)Positive and negative results
1 paper in the same direction as this paper · 3 in the opposite direction
- positive
- positive
- positive
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See all 5 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.