Abstract
Dormant seeds of barley were exposed to different doses of x rays, gamma rays, or fast neutrons and stored for varying times after the treatment. After storage, the seeds were germinated and grown on moist blotters. Radiation damage was measured as per cent reduction in seedling height from the control at 6 days. It was found that damage increased by as much as a factor of 20 after storage for a few weeks. There were two components to the curve of storage versus damage. The first component was rapid and nearly complete in 4 hours, whereas the second component was very slow and lasted many weeks. The moisture content of the seeds greatly influenced the magnitude of the effect and the nature of the curves obtained. Very dry seeds showed a large first component to the curve, whereas for moist seeds the first component was very small or absent. The second component was approximately the same for dry and moist seeds. There was no storage effect for seeds irradiated with fast neutrons. No clear explanation for these results can be given at the present time, but they are very similar to results which have been obtained on an after-effect ofmore » radiation in certain aqueous solutions. (auth)« less
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Claims 7
Claim · model-written summary
Storage for a few weeks increased radiation damage in barley seedlings by as much as a factor of 20.
- Taxon
- barley
.jpg?width=60)
Hordeum vulgaree1 - Treatment
- storage for a few weekse0
- Outcome
- damagee0
- Direction
- increasede0
- Value
- a factor of 20e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“damage increased by as much as a factor of 20 after storage for a few weeks”
e1“Dormant seeds of barley”
Claim · model-written summary
The first component of storage-related radiation damage was rapid and nearly complete in four hours.
- Taxon
- barleyHordeum vulgaree1
- Outcome
- first componente0
- Direction
- rapid and nearly completee0
- Value
- 4 hourse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The first component was rapid and nearly complete in 4 hours”
e1“Dormant seeds of barley”
Claim · model-written summary
The second component of storage-related radiation damage was slow and lasted many weeks.
- Taxon
- barleyHordeum vulgaree1
- Outcome
- second componente0
- Direction
- very slowe0
- Qualifier
- many weekse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the second component was very slow and lasted many weeks”
e1“Dormant seeds of barley”
Claim · model-written summary
Seed moisture content strongly influenced the magnitude and shape of storage-related radiation damage.
- Taxon
- barleyHordeum vulgaree1
- Organ / stage
- seedse0
- Outcome
- magnitude of the effect and the nature of the curvese0
- Direction
- greatly influencede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The moisture content of the seeds greatly influenced the magnitude of the effect and the nature of the curves obtained.”
e1“Dormant seeds of barley”
Claim · model-written summary
Very dry barley seeds showed a large first damage component, whereas moist seeds showed a very small or absent one.
- Taxon
- barleyHordeum vulgaree1
- Organ / stage
- seedse0
- Outcome
- first component to the curvee0
- Direction
- largee0
- Comparator
- moist seedse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Very dry seeds showed a large first component to the curve, whereas for moist seeds the first component was very small or absent.”
e1“Dormant seeds of barley”
Claim · model-written summary
The second damage component was approximately the same in dry and moist barley seeds.
- Taxon
- barleyHordeum vulgaree1
- Outcome
- second componente0
- Direction
- approximately the samee0
- Comparator
- dry and moist seedse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The second component was approximately the same for dry and moist seeds.”
e1“Dormant seeds of barley”
Claim · model-written summary
Barley seeds irradiated with fast neutrons showed no storage effect.
- Taxon
- barleyHordeum vulgaree1
- Treatment
- fast neutronse0
- Outcome
- storage effecte0
- Direction
- noe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There was no storage effect for seeds irradiated with fast neutrons.”
e1“Dormant seeds of barley”
The same questions in other papers
storage · pest · Hordeum vulgare (barley)Positive and negative results
1 paper in the same direction as this paper · 1 in the opposite direction
- no effect
- 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.