Abstract
The tannins chebulinic acid or tara tannin were added to an incubation system in which GA(3) induces enzyme synthesis in endosperm half seeds of barley (Hordeum vulgare L.). The activity of amylase and acid phosphatase in the incubation medium was reduced compared to the activity in the medium after incubation with GA(3) alone. When embryo half seeds of barley were incubated with chebulinic acid or tara tannin in the absence of added GA(3), the enzyme activity of the incubation medium was also reduced. The activity of preformed enzymes obtained from endosperm half seeds previously induced with GA(3) was not reduced by the addition of tannin. Comparisons were made of the amount of enzyme activity from breis of aleurone layers incubated with GA(3) in the presence and absence of tannins. The amounts of activity were relatively small and approximately equal in both cases, indicating that secretion from the aleurone was not blocked by the tannins. The reduction of enzyme activity caused by tannins in both endosperm and embryo half seeds could be completely reversed by the addition of GA(3).
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Claims 7
Claim · model-written summary
Chebulinic acid reduced amylase and acid phosphatase activity in barley endosperm medium relative to GA(3) alone.
- Taxon
- barley
.jpg?width=60)
Hordeum vulgaree0 - Treatment
- chebulinic acide0
- Outcome
- activity of amylase and acid phosphatasee0
- Direction
- reducede0
- Comparator
- GA(3) alonee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“The tannins chebulinic acid or tara tannin were added to an incubation system in which GA(3) induces enzyme synthesis in endosperm half seeds of barley (Hordeum vulgare L.). The activity of amylase and acid phosphatase in the incubation medium was reduced compared to the activity in the medium after incubation with GA(3) alone.”
Claim · model-written summary
Tara tannin reduced amylase and acid phosphatase activity in barley endosperm medium relative to GA(3) alone.
- Taxon
- barleyHordeum vulgaree0
- Treatment
- tara tannine0
- Outcome
- activity of amylase and acid phosphatasee0
- Direction
- reducede0
- Comparator
- GA(3) alonee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The tannins chebulinic acid or tara tannin were added to an incubation system in which GA(3) induces enzyme synthesis in endosperm half seeds of barley (Hordeum vulgare L.). The activity of amylase and acid phosphatase in the incubation medium was reduced compared to the activity in the medium after incubation with GA(3) alone.”
Claim · model-written summary
Chebulinic acid reduced enzyme activity in embryo half seeds without added GA(3).
- Taxon
- barleyHordeum vulgaree0
- Organ / stage
- embryo half seedse0
- Treatment
- chebulinic acide0
- Outcome
- enzyme activity of the incubation mediume0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When embryo half seeds of barley were incubated with chebulinic acid or tara tannin in the absence of added GA(3), the enzyme activity of the incubation medium was also reduced.”
Claim · model-written summary
Tara tannin reduced enzyme activity in embryo half seeds without added GA(3).
- Taxon
- barleyHordeum vulgaree0
- Organ / stage
- embryo half seedse0
- Treatment
- tara tannine0
- Outcome
- enzyme activity of the incubation mediume0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When embryo half seeds of barley were incubated with chebulinic acid or tara tannin in the absence of added GA(3), the enzyme activity of the incubation medium was also reduced.”
Claim · model-written summary
Tannin did not reduce activity of preformed enzymes in barley endosperm half seeds.
- Taxon
- Barley SeedsHordeum vulgaret0
- Treatment
- addition of tannine0
- Outcome
- activity of preformed enzymese0
- Direction
- not reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The activity of preformed enzymes obtained from endosperm half seeds previously induced with GA(3) was not reduced by the addition of tannin.”
t0“Barley Seeds”
Claim · model-written summary
Aleurone enzyme activity was approximately equal with and without tannins, suggesting secretion was not blocked.
- Taxon
- Barley SeedsHordeum vulgaret0
- Treatment
- presence and absence of tanninse1
- Outcome
- amounts of activitye0
- Direction
- approximately equale0
- Comparator
- absence of tanninse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The amounts of activity were relatively small and approximately equal in both cases, indicating that secretion from the aleurone was not blocked by the tannins.”
e1“aleurone layers incubated with GA(3) in the presence and absence of tannins”
t0“Barley Seeds”
Claim · model-written summary
Adding GA(3) completely reversed the tannin-induced reduction of enzyme activity in barley endosperm and embryo halves.
- Taxon
- Barley SeedsHordeum vulgaret0
- Treatment
- addition of GA(3)e0
- Outcome
- reduction of enzyme activitye0
- Direction
- completely reversede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The reduction of enzyme activity caused by tannins in both endosperm and embryo half seeds could be completely reversed by the addition of GA(3).”
t0“Barley Seeds”
The same questions in other papers
Gibberellic acid · soil: biology · Hordeum vulgare (barley)Results agree
1 paper in the same direction as this paper
- positive
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.