Abstract
The influence of ascorbic acid, potassium permanganate and caffeine on the postirradiation seedling injury of dry barley seeds was studied, irradiated (350 Gy 60Co gamma-rays) in vacuo and post-hydrated with varying oxygen concentrations in the soaking medium. The oxygen concentration in the post-hydration medium (OCHG) was adjusted at 0%, 10%, 30%, 50%, 80% and 100%. A linear response between the seedling injury and O2 concentration in the range of 0-80% was observed. These chemicals potentiated, protected or exerted no effect, depending upon the OCHG. Thus, ascorbic acid did not exert any effect on seeds post-hydrated at OCHG of less than or equal to 30%, but afforded radio-protection at OCHG of greater than or equal to 50%. Caffeine, on the other hand, potentiated the postirradiation injury at OCHG of less than or equal to 30%, exerted no influence at OCHG of approximately 50% and afforded radioprotection at OCHG of greater than or equal to 80%. Potassium permanganate enhanced the injury at OCHG of less than or equal to 10%, exerted no effect at OCHG of approximately 30% and afforded radioprotection at OCHG of greater than or equal to 50%. The possible radiation-chemical events in the dry irradiated seeds following their post-hydration containing different OCHG and the three test chemicals which are known free radical scavengers are discussed.
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Claims 9
Claim · model-written summary
Seedling injury varied linearly with oxygen concentration from 0 to 80%.
- Taxon
- Barley
.jpg?width=60)
Hordeum vulgaret0 - Treatment
- O2 concentratione0
- Outcome
- seedling injurye0
- Value
- 0-80%e0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“A linear response between the seedling injury and O2 concentration in the range of 0-80% was observed”
t0“Barley”
Claim · model-written summary
Ascorbic acid had no effect at oxygen concentrations up to 30%.
- Taxon
- BarleyHordeum vulgaret0
- Treatment
- ascorbic acide0
- Outcome
- seeds post-hydratede0
- Direction
- did not exert any effecte0
- Qualifier
- OCHG of less than or equal to 30%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“ascorbic acid did not exert any effect on seeds post-hydrated at OCHG of less than or equal to 30%”
t0“Barley”
Claim · model-written summary
Ascorbic acid protected against radiation injury at oxygen concentrations of at least 50%.
- Taxon
- BarleyHordeum vulgaret0
- Treatment
- ascorbic acide0
- Outcome
- radio-protectione0
- Direction
- affordede0
- Qualifier
- OCHG of greater than or equal to 50%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“ascorbic acid did not exert any effect on seeds post-hydrated at OCHG of less than or equal to 30%, but afforded radio-protection at OCHG of greater than or equal to 50%”
t0“Barley”
Claim · model-written summary
Caffeine increased injury at oxygen concentrations up to 30%.
- Taxon
- BarleyHordeum vulgaret0
- Treatment
- Caffeinee0
- Outcome
- postirradiation injurye0
- Direction
- potentiatede0
- Qualifier
- OCHG of less than or equal to 30%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Caffeine, on the other hand, potentiated the postirradiation injury at OCHG of less than or equal to 30%”
t0“Barley”
Claim · model-written summary
Caffeine had no effect at about 50% oxygen.
- Taxon
- BarleyHordeum vulgaret1
- Treatment
- Caffeinet0
- Outcome
- influencee0
- Direction
- no influencee0
- Qualifier
- OCHG of approximately 50%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“exerted no influence at OCHG of approximately 50%”
t0“Caffeine, on the other hand, potentiated the postirradiation injury”
t1“Barley Seeds”
Claim · model-written summary
Caffeine protected at oxygen concentrations of at least 80%.
- Taxon
- BarleyHordeum vulgaret1
- Treatment
- Caffeinet0
- Outcome
- radioprotectione0
- Direction
- affordede0
- Qualifier
- OCHG of greater than or equal to 80%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“afforded radioprotection at OCHG of greater than or equal to 80%”
t0“Caffeine, on the other hand, potentiated the postirradiation injury”
t1“Barley Seeds”
Claim · model-written summary
Potassium permanganate increased injury at oxygen concentrations up to 10%.
- Taxon
- BarleyHordeum vulgaret0
- Treatment
- Potassium permanganatee0
- Outcome
- injurye0
- Direction
- enhancede0
- Qualifier
- OCHG of less than or equal to 10%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Potassium permanganate enhanced the injury at OCHG of less than or equal to 10%”
t0“Barley”
Claim · model-written summary
Potassium permanganate had no effect at about 30% oxygen.
- Taxon
- BarleyHordeum vulgaret1
- Treatment
- Potassium permanganatet0
- Outcome
- effecte0
- Direction
- no effecte0
- Qualifier
- OCHG of approximately 30%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“exerted no effect at OCHG of approximately 30%”
t0“Potassium permanganate enhanced the injury”
t1“Barley Seeds”
Claim · model-written summary
Potassium permanganate protected at oxygen concentrations of at least 50%.
- Taxon
- BarleyHordeum vulgaret1
- Treatment
- Potassium permanganatet0
- Outcome
- radioprotectione0
- Direction
- affordede0
- Qualifier
- OCHG of greater than or equal to 50%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“afforded radioprotection at OCHG of greater than or equal to 50%”
t0“Potassium permanganate enhanced the injury”
t1“Barley Seeds”
The same questions in other papers
caffeine · crop injury · Hordeum vulgare (barley)Results agree
1 paper in the same direction as this paper
- negative
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.