Abstract
Fourteen chemically defined hydrolyzable tannins and six impure mixtures of either condensed or hydrolyzable tannins were found to inhibit the gibberellin-induced growth of light-grown dwarf pea seedlings. The highest ratio of tannins to gibberellic acid tested (1000: 1 by weight) inhibited from 80 to 95% of the induced growth for all tannins tested except for two monogalloyl glucose tannins which inhibited only 50% of the induced growth. The lowest ratio tested (10: 1) inhibited the induced growth by less than 25% except for the case of terchebin where 50% inhibition was found. The inhibition of gibberellin-induced growth was found to be completely reversed by increasing the amount of gibberellin in three cases tested. Tannins alone did not inhibit endogenous growth of either dwarf or nondwarf pea seedlings. Eight compounds related to tannins, including coumarin, trans-cinnamic acid, and a number of phenolic compounds were also tested as gibberellin antagonists. Most of these compounds showed some inhibition of gibberellin-induced growth, but less than that of the tannins. At the highest ratio (1000: 1) the greatest inhibition was 55%; at the lowest ratio (10: 1) no more than 17% was observed. These compounds did not inhibit endogenous growth, and the inhibition of gibberellin-induced growth could be reversed by increasing the amount of gibberellin in two cases tested.Six chemically defined tannins were found to inhibit hypocotyl growth induced by gibberellic acid in cucumber seedlings. Growth induced by indoleacetic acid in the same test was not inhibited. The highest ratio of tannin to promotor tested gave strong inhibition of gibberellic acid-induced growth, but actually enhanced the growth induced by indoleacetic acid. This difference in action suggests a specificity between the tannins and gibberellic acid.
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Claims 16
Claim · model-written summary
Tannins inhibited gibberellin-induced growth of dwarf pea seedlings.
- Taxon
- pea
Lathyrus oleraceuse0 - Organ / stage
- seedlingse0
- Treatment
- tanninse0
- Outcome
- gibberellin-induced growthe0
- Direction
- inhibite0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fourteen chemically defined hydrolyzable tannins and six impure mixtures of either condensed or hydrolyzable tannins were found to inhibit the gibberellin-induced growth of light-grown dwarf pea seedlings.”
Claim · model-written summary
At a 1000:1 ratio, most tannins inhibited induced growth by 80 to 95%.
- Taxon
- peaLathyrus oleraceuse1
- Treatment
- tanninse0
- Outcome
- induced growthe0
- Direction
- inhibitede0
- Value
- 80 to 95%e0
- Qualifier
- 1000: 1 by weighte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest ratio of tannins to gibberellic acid tested (1000: 1 by weight) inhibited from 80 to 95% of the induced growth for all tannins tested except for two monogalloyl glucose tannins”
e1“light-grown dwarf pea seedlings”
Claim · model-written summary
At a 1000:1 ratio, two monogalloyl glucose tannins inhibited induced growth by 50%.
- Taxon
- peaLathyrus oleraceuse2
- Treatment
- two monogalloyl glucose tanninse0
- Outcome
- induced growthe0
- Direction
- inhibitede0
- Value
- 50%e0
- Qualifier
- 1000: 1 by weighte1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“two monogalloyl glucose tannins which inhibited only 50% of the induced growth”
e1“1000: 1 by weight”
e2“light-grown dwarf pea seedlings”
Claim · model-written summary
At a 10:1 ratio, tannins generally inhibited induced growth by less than 25%.
- Taxon
- peaLathyrus oleraceuse1
- Treatment
- terchebine0
- Outcome
- induced growthe0
- Direction
- inhibitede0
- Value
- less than 25%e0
- Qualifier
- 10: 1e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The lowest ratio tested (10: 1) inhibited the induced growth by less than 25% except for the case of terchebin”
e1“light-grown dwarf pea seedlings”
Claim · model-written summary
Terchebin inhibited induced growth by 50% at the lowest ratio.
- Taxon
- peaLathyrus oleraceuse2
- Treatment
- terchebine0
- Outcome
- inhibitione0
- Direction
- inhibitione0
- Value
- 50%e0
- Qualifier
- 10: 1e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“terchebin where 50% inhibition was found”
e1“The lowest ratio tested (10: 1)”
e2“light-grown dwarf pea seedlings”
Claim · model-written summary
More gibberellin fully reversed tannin inhibition in three tested cases.
- Taxon
- peaLathyrus oleraceuse1
- Treatment
- increasing the amount of gibberelline0
- Outcome
- inhibition of gibberellin-induced growthe0
- Direction
- completely reversede0
- Qualifier
- in three cases testede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The inhibition of gibberellin-induced growth was found to be completely reversed by increasing the amount of gibberellin in three cases tested.”
e1“light-grown dwarf pea seedlings”
Claim · model-written summary
Tannins alone did not inhibit endogenous growth in dwarf or nondwarf pea seedlings.
- Taxon
- peaLathyrus oleraceuse0
- Treatment
- Tannins alonee0
- Outcome
- endogenous growthe0
- Direction
- did not inhibite0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Tannins alone did not inhibit endogenous growth of either dwarf or nondwarf pea seedlings.”
Claim · model-written summary
Most tannin-related compounds inhibited gibberellin-induced growth less than tannins.
- Taxon
- peaLathyrus oleraceuse1
- Treatment
- these compoundse0
- Outcome
- gibberellin-induced growthe0
- Direction
- some inhibitione0
- Comparator
- tanninse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Most of these compounds showed some inhibition of gibberellin-induced growth, but less than that of the tannins.”
e1“light-grown dwarf pea seedlings”
Claim · model-written summary
Related compounds gave at most 55% inhibition at 1000:1.
- Taxon
- peaLathyrus oleraceuse1
- Outcome
- inhibitione0
- Direction
- greatest inhibitione0
- Value
- 55%e0
- Qualifier
- 1000: 1e0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At the highest ratio (1000: 1) the greatest inhibition was 55%”
e1“light-grown dwarf pea seedlings”
Claim · model-written summary
Related compounds gave at most 17% inhibition at 10:1.
- Taxon
- peaLathyrus oleraceuse1
- Outcome
- 17%e0
- Value
- 17%e0
- Qualifier
- 10: 1e0
Not reportedTreatmentComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“at the lowest ratio (10: 1) no more than 17% was observed”
e1“light-grown dwarf pea seedlings”
Claim · model-written summary
Related compounds did not inhibit endogenous growth.
- Taxon
- peaLathyrus oleraceuse1
- Treatment
- These compoundse0
- Outcome
- endogenous growthe0
- Direction
- did not inhibite0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“These compounds did not inhibit endogenous growth”
e1“light-grown dwarf pea seedlings”
Claim · model-written summary
Increasing gibberellin reversed related-compound inhibition in two tested cases.
- Taxon
- peaLathyrus oleraceuse1
- Treatment
- increasing the amount of gibberelline0
- Outcome
- inhibition of gibberellin-induced growthe0
- Direction
- reversede0
- Qualifier
- two cases testede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the inhibition of gibberellin-induced growth could be reversed by increasing the amount of gibberellin in two cases tested”
e1“light-grown dwarf pea seedlings”
Claim · model-written summary
Six defined tannins inhibited gibberellic acid-induced cucumber hypocotyl growth.
- Taxon
- cucumber
Cucumis sativuse0 - Treatment
- tanninse0
- Outcome
- hypocotyl growth induced by gibberellic acide0
- Direction
- inhibite0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Six chemically defined tannins were found to inhibit hypocotyl growth induced by gibberellic acid in cucumber seedlings.”
Claim · model-written summary
Tannins did not inhibit indoleacetic acid-induced cucumber growth.
- Taxon
- cucumberCucumis sativuse1
- Treatment
- indoleacetic acide0
- Outcome
- Growthe0
- Direction
- not inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Growth induced by indoleacetic acid in the same test was not inhibited.”
e1“cucumber seedlings”
Claim · model-written summary
At the highest ratio, tannins enhanced indoleacetic acid-induced cucumber growth.
- Taxon
- cucumberCucumis sativuse1
- Treatment
- tannine0
- Outcome
- growth induced by indoleacetic acide0
- Direction
- enhancede0
- Qualifier
- highest ratio of tannin to promotor testede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest ratio of tannin to promotor tested gave strong inhibition of gibberellic acid-induced growth, but actually enhanced the growth induced by indoleacetic acid.”
e1“cucumber seedlings”
Claim · model-written summary
At the highest ratio, tannins strongly inhibited gibberellic acid-induced cucumber growth.
- Taxon
- cucumberCucumis sativuse1
- Treatment
- tannine0
- Outcome
- gibberellic acid-induced growthe0
- Direction
- strong inhibitione0
- Qualifier
- highest ratio of tannin to promotor testede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest ratio of tannin to promotor tested gave strong inhibition of gibberellic acid-induced growth, but actually enhanced the growth induced by indoleacetic acid.”
e1“cucumber seedlings”
The same questions in other papers
indole-3-acetic acid · growth · Cucumis sativus (cucumber)Results differ
3 papers in the same direction as this paper · 12 in the opposite direction
- positive
- positive
- positive
12 papers more in this group
See all 16 papers →glucose · growth · Lathyrus oleraceus (pea)Positive and negative results
2 papers in the same direction as this paper · 2 in the opposite direction
- positive
- positive
- no effect
1 paper more in this group
See all 5 papers →class · disease · Lathyrus oleraceus (pea)Positive and negative results
3 papers in the same direction as this paper · 1 in the opposite direction
- no effect
- positive
- positive
1 paper more in this group
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.