Abstract
The cell walls of barley (Hordeum vulgare var. Himalaya) aleurone layers undergo extensive degradation during the tissue's response to gibberellic acid. Previous work had shown that these cell walls consist almost entirely of arabinoxylan. In this study we show that gibberellic acid stimulates endo-beta-1,4-xylanase activity in isolated aleurone layers. In addition, gibberellic acid enhances the activity of two glycosidases: beta-xylopyranosidase and alpha-arabinofuranosidase. No gibberellic acid-stimulated cellulase activity was detected. Germination studies showed a similar pattern of enzyme development in intact seeds.
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Claims 5
Claim · model-written summary
Barley aleurone cell walls undergo extensive degradation in response to gibberellic acid.
- Taxon
- barley
.jpg?width=60)
Hordeum vulgaree0 - Treatment
- gibberellic acide0
- Outcome
- cell wallse0
- Direction
- extensive degradatione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“The cell walls of barley (Hordeum vulgare var. Himalaya) aleurone layers undergo extensive degradation during the tissue's response to gibberellic acid.”
Claim · model-written summary
Gibberellic acid stimulated endo-beta-1,4-xylanase activity.
- Taxon
- BarleyHordeum vulgaret0
- Treatment
- gibberellic acide0
- Gene
- endo-beta-1,4-xylanasee0
- Outcome
- endo-beta-1,4-xylanase activitye0
- Direction
- stimulatese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In this study we show that gibberellic acid stimulates endo-beta-1,4-xylanase activity in isolated aleurone layers.”
t0“Barley”
Claim · model-written summary
Gibberellic acid enhanced beta-xylopyranosidase and alpha-arabinofuranosidase activity.
- Taxon
- BarleyHordeum vulgaret0
- Treatment
- gibberellic acide0
- Outcome
- activity of two glycosidases: beta-xylopyranosidase and alpha-arabinofuranosidasee0
- Direction
- enhancese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In addition, gibberellic acid enhances the activity of two glycosidases: beta-xylopyranosidase and alpha-arabinofuranosidase.”
t0“Barley”
Claim · model-written summary
No gibberellic acid-stimulated cellulase activity was detected.
- Taxon
- BarleyHordeum vulgaret0
- Treatment
- gibberellic acide0
- Outcome
- cellulase activitye0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“No gibberellic acid-stimulated cellulase activity was detected.”
t0“Barley”
Claim · model-written summary
Intact seeds showed a similar enzyme-development pattern.
- Taxon
- BarleyHordeum vulgaret0
- Organ / stage
- intact seedse0
- Outcome
- similar pattern of enzyme developmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Germination studies showed a similar pattern of enzyme development in intact seeds.”
t0“Barley”
The same questions in other papers
Gibberellic acid · physiology: enzyme activity · Hordeum vulgare (barley)Positive and negative results
2 papers in the same direction as this paper · 14 in the opposite direction
- positive
- positive
- positive
13 papers more in this group
See all 17 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.