Abstract
Plants of barley (Hordeum vulgare L. cultivar Proctor) otherwise grown, in long days (16 h) were given a 2-week exposure to short days from the following stages of main shoot development: (A) double ridge, (B) stamen initial, (C) awn initial, and (D) a later stage of awn differentiation. Treatment B led to severe inhibition and ultimate death of the main shoot ear and treatments C and D to the almost complete failure of certain ears to set grain. In main shoot ears the reduction in floret fertility was shown to be due to male sterility. The effects on shoot mortality and floret fertility are new and have not been observed by other workers when plants were grown in continuous short days. They therefore appear to depend on an exposure to long days before the treatment with short days. In contrast, the effects of the short days on vegetative characters, such as the number, length, and width of leaves on the main shoot and the numbers of tillers produced, were similar to those which have been observed under continuous short days.
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Claims 6
Claim · model-written summary
A 2-week short-day exposure at the stamen initial stage caused severe inhibition and ultimate death of the main shoot ear in barley otherwise grown in long days.
- Taxon
- barley
.jpg?width=60)
Hordeum vulgaree1 - Material
- cultivar Proctore1
- Organ / stage
- main shoot eare2
- Treatment
- 2-week exposure to short dayse1
- Outcome
- inhibition and ultimate death of the main shoot eare2
- Direction
- inhibitione2
- Qualifier
- (B) stamen initiale1
- Comparator
- otherwise grown, in long days (16 h)e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e1“Plants of barley (Hordeum vulgare L. cultivar Proctor) otherwise grown, in long days (16 h) were given a 2-week exposure to short days from the following stages of main shoot development: (A) double ridge, (B) stamen initial, (C) awn initial, and (D) a later stage of awn differentiation”
e2“Treatment B led to severe inhibition and ultimate death of the main shoot ear”
Claim · model-written summary
A 2-week short-day exposure at the awn initial and later awn differentiation stages caused almost complete failure of certain barley ears to set grain.
- Taxon
- barleyHordeum vulgaree1
- Material
- cultivar Proctore1
- Organ / stage
- certain earse3
- Treatment
- 2-week exposure to short dayse1
- Outcome
- failure of certain ears to set graine3
- Direction
- decreaseinferrede3
- Qualifier
- (C) awn initial, and (D) a later stage of awn differentiatione1
- Comparator
- otherwise grown, in long days (16 h)e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Plants of barley (Hordeum vulgare L. cultivar Proctor) otherwise grown, in long days (16 h) were given a 2-week exposure to short days from the following stages of main shoot development: (A) double ridge, (B) stamen initial, (C) awn initial, and (D) a later stage of awn differentiation”
e3“treatments C and D to the almost complete failure of certain ears to set grain”
Claim · model-written summary
In main shoot ears of barley, the reduction in floret fertility was shown to be due to male sterility.
- Taxon
- BarleyHordeum vulgaret0
- Organ / stage
- main shoot earse4
- Outcome
- reduction in floret fertilitye4
- Qualifier
- male sterilitye4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“In main shoot ears the reduction in floret fertility was shown to be due to male sterility”
t0“Growth and Development of Barley”
Claim · model-written summary
The short-day effects on the number, length and width of leaves on the main shoot were similar to those under continuous short days.
- Taxon
- BarleyHordeum vulgaret0
- Treatment
- short dayse5
- Outcome
- number, length, and width of leaves on the main shoote5
- Direction
- similare5
- Comparator
- continuous short dayse5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“the effects of the short days on vegetative characters, such as the number, length, and width of leaves on the main shoot and the numbers of tillers produced, were similar to those which have been observed under continuous short days”
t0“Growth and Development of Barley”
Claim · model-written summary
The short-day effect on the numbers of tillers produced was similar to that under continuous short days.
- Taxon
- BarleyHordeum vulgaret0
- Treatment
- short dayse5
- Outcome
- numbers of tillers producede5
- Direction
- similare5
- Comparator
- continuous short dayse5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“the effects of the short days on vegetative characters, such as the number, length, and width of leaves on the main shoot and the numbers of tillers produced, were similar to those which have been observed under continuous short days”
t0“Growth and Development of Barley”
Claim · model-written summary
The shoot mortality and floret fertility effects appear to depend on an earlier long-day exposure before the short-day treatment.
- Taxon
- BarleyHordeum vulgaret0
- Outcome
- effects on shoot mortality and floret fertilitye6
- Qualifier
- an exposure to long days before the treatment with short dayse6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“The effects on shoot mortality and floret fertility are new and have not been observed by other workers when plants were grown in continuous short days. They therefore appear to depend on an exposure to long days before the treatment with short days”
t0“Growth and Development of Barley”
The same questions in other papers
light · disease · Hordeum vulgare (barley)Positive and negative results
1 paper in the same direction as this paper · 6 in the opposite direction
- positive
- positive
- positive
4 papers more in this group
See all 8 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.