Abstract
The relationship between barley grain dormancy and gibberellic acid (GA(3)) responsiveness of aleurone layers has been investigated. Barley (Hordeum distichum L. cvs Triumph and Kristina) grains were matured under defined conditions in a phytotron. Grains of Triumph plants grown under long-day/warm conditions had lower dormancy levels than grains of plants grown under short-day/cool conditions. Aleurone layers isolated from grains of long-day Triumph plants secreted more alpha-amylase and had a higher responsiveness to GA(3) as measured by alpha-amylase secretion. Storage of the grains increased both the percentage of germination and the responsiveness of the aleurone to GA(3). Use of different sterilization methods to break dormancy confirmed the correlation between germination percentage and aleurone layer GA(3) responsiveness. The response of embryoless Triumph grains to GA(3) was lower than that of the isolated aleurone layers, suggesting a role of the starchy endosperm in regulating the GA(3) response of the aleurone layer. Grains of the cultivar Kristina harvested from short day- and long day-grown plants lacked dormancy, and their isolated aleurone layers had a similar responsiveness to GA(3) as measured by alpha-amylase secretion. The data indicate that the physiological state of the aleurone layers contributes to the percentage germination of the grains.
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Claims 9
Claim · model-written summary
Long-day, warm growth conditions gave Triumph barley grains lower dormancy than short-day, cool conditions.
- Taxon
- Barley
.jpg?width=60)
Hordeum vulgaret0 - Material
- Triumphe1
- Treatment
- long-day/warm conditionse1
- Outcome
- dormancy levelse1
- Direction
- lowere1
- Comparator
- short-day/cool conditionse1
- Setting
- phytotrone2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
t0“Barley”
e1“Grains of Triumph plants grown under long-day/warm conditions had lower dormancy levels than grains of plants grown under short-day/cool conditions”
e2“grains were matured under defined conditions in a phytotron”
Claim · model-written summary
Aleurone layers from long-day Triumph grains secreted more alpha-amylase.
- Taxon
- BarleyHordeum vulgaret0
- Material
- Triumphe3
- Organ / stage
- Aleurone layerse3
- Outcome
- alpha-amylasee3
- Direction
- moree3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Barley”
e3“Aleurone layers isolated from grains of long-day Triumph plants secreted more alpha-amylase and had a higher responsiveness to GA(3) as measured by alpha-amylase secretion”
Claim · model-written summary
Aleurone layers from long-day Triumph grains had higher responsiveness to GA(3), measured as alpha-amylase secretion.
- Taxon
- BarleyHordeum vulgaret0
- Material
- Triumphe3
- Organ / stage
- Aleurone layerse3
- Outcome
- responsiveness to GA(3)e3
- Direction
- highere3
- Qualifier
- as measured by alpha-amylase secretione3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Barley”
e3“Aleurone layers isolated from grains of long-day Triumph plants secreted more alpha-amylase and had a higher responsiveness to GA(3) as measured by alpha-amylase secretion”
Claim · model-written summary
Storage of barley grains increased the percentage of germination.
- Taxon
- BarleyHordeum vulgaret0
- Treatment
- Storage of the grainse4
- Outcome
- percentage of germinatione4
- Direction
- increasede4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Barley”
e4“Storage of the grains increased both the percentage of germination and the responsiveness of the aleurone to GA(3)”
Claim · model-written summary
Storage of barley grains increased the responsiveness of the aleurone to GA(3).
- Taxon
- BarleyHordeum vulgaret0
- Treatment
- Storage of the grainse4
- Outcome
- responsiveness of the aleurone to GA(3)e4
- Direction
- increasede4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Barley”
e4“Storage of the grains increased both the percentage of germination and the responsiveness of the aleurone to GA(3)”
Claim · model-written summary
Germination percentage and aleurone GA(3) responsiveness of barley grains were correlated, as confirmed after sterilization treatments that break dormancy.
- Taxon
- BarleyHordeum vulgaret0
- Organ / stage
- aleurone layere5
- Treatment
- different sterilization methods to break dormancye5
- Outcome
- correlation between germination percentage and aleurone layer GA(3) responsivenesse5
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Barley”
e5“Use of different sterilization methods to break dormancy confirmed the correlation between germination percentage and aleurone layer GA(3) responsiveness”
Claim · model-written summary
Embryoless Triumph grains responded to GA(3) less than isolated aleurone layers.
- Taxon
- BarleyHordeum vulgaret0
- Material
- Triumphe6
- Treatment
- embryolesse6
- Outcome
- response of embryoless Triumph grains to GA(3)e6
- Direction
- lowere6
- Comparator
- isolated aleurone layerse6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Barley”
e6“The response of embryoless Triumph grains to GA(3) was lower than that of the isolated aleurone layers”
Claim · model-written summary
Kristina barley grains harvested from short- and long-day plants lacked dormancy.
- Taxon
- BarleyHordeum vulgaret0
- Material
- Kristinae7
- Organ / stage
- Grainse7
- Outcome
- dormancye7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Barley”
e7“Grains of the cultivar Kristina harvested from short day- and long day-grown plants lacked dormancy”
Claim · model-written summary
Isolated aleurone layers of Kristina barley had a similar responsiveness to GA(3) as measured by alpha-amylase secretion.
- Taxon
- BarleyHordeum vulgaret0
- Material
- Kristinae7
- Organ / stage
- isolated aleurone layerse2
- Outcome
- responsiveness to GA(3)e2
- Direction
- similare2
- Qualifier
- as measured by alpha-amylase secretione2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Barley”
e7“Grains of the cultivar Kristina harvested from short day- and long day-grown plants lacked dormancy”
e2“their isolated aleurone layers had a similar responsiveness to GA(3) as measured by alpha-amylase secretion”
The same questions in other papers
storage · growth · Hordeum vulgare (barley)Positive and negative results
12 papers in the same direction as this paper · 6 in the opposite direction
- no effect
- negative
- negative
15 papers more in this group
See all 19 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.