Abstract
L.). Rice plants at the tillering stage were exposed to gamma rays for 8 h (acute irradiation) or 10 days (chronic irradiation), with a total irradiation dose of 100, 200, or 300 Gy. Plants exposed to gamma irradiation were then analyzed for DNA damage, oxidative stress indicators including free radical content and lipid peroxidation, radical scavenging, and antioxidant activity. The results showed that all stress indices increased immediately after exposure to both acute and chronic irradiation in a dose-dependent manner, and acute irradiation had a greater effect on plants than chronic irradiation. The photosynthetic efficiency and growth of plants measured at 10, 20, and 30 days post-irradiation decreased in irradiated plants, i.e., these two parameters were more severely affected by acute irradiation than by chronic irradiation. In contrast, acutely irradiated plants produced seeds with dramatically decreased fertility rate, and chronically irradiated plants failed to produce fertile seeds, i.e., reproduction was more severely affected by chronic irradiation than by acute irradiation. Overall, our findings suggest that acute gamma irradiation causes instantaneous and greater damage to plant physiology, whereas chronic gamma irradiation causes long-term damage, leading to reproductive failure.
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Claims 6
Claim · model-written summary
Stress indices increased dose dependently after both irradiation regimens.
- Taxon
- Rice Plants
Oryza sativat0 - Treatment
- both acute and chronic irradiatione0
- Outcome
- all stress indicese0
- Direction
- increasede0
- Qualifier
- dose-dependent mannere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“all stress indices increased immediately after exposure to both acute and chronic irradiation in a dose-dependent manner”
t0“Rice Plants”
Claim · model-written summary
Acute irradiation affected plants more than chronic irradiation.
Verbatim
e0“acute irradiation had a greater effect on plants than chronic irradiation.”
Claim · model-written summary
Irradiation decreased photosynthetic efficiency and growth.
- Taxon
- plantsViridiplantaee0
- Treatment
- irradiatede0
- Outcome
- photosynthetic efficiency and growthe0
- Direction
- decreasede0
- Qualifier
- 10, 20, and 30 days post-irradiatione0
Not reportedComparator
Verbatim
e0“The photosynthetic efficiency and growth of plants measured at 10, 20, and 30 days post-irradiation decreased in irradiated plants”
Claim · model-written summary
Acute irradiation impaired photosynthesis and growth more than chronic irradiation.
- Taxon
- Rice PlantsOryza sativat0
- Treatment
- acute irradiatione0
- Outcome
- these two parameterse0
- Direction
- more severely affectede0
- Comparator
- chronic irradiatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“these two parameters were more severely affected by acute irradiation than by chronic irradiation.”
t0“Rice Plants”
Claim · model-written summary
Acute irradiation decreased seed fertility.
- Taxon
- plantsViridiplantaee0
- Treatment
- acutely irradiatede0
- Outcome
- fertility ratee0
- Direction
- decreasede0
Not reportedComparator
Verbatim
e0“acutely irradiated plants produced seeds with dramatically decreased fertility rate”
Claim · model-written summary
Chronic irradiation prevented fertile seed production.
- Taxon
- plantsViridiplantaee0
- Treatment
- chronically irradiatede0
- Outcome
- failed to produce fertile seedse0
Not reportedComparatorDirection
Verbatim
e0“chronically irradiated plants failed to produce fertile seeds”
The same questions in other papers
radiation · physiology: photosynthesis · Viridiplantae (plants)Positive and negative results
1 paper in the same direction as this paper · 1 in the opposite direction
- positive
- 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.