Abstract
In this study, pretreatment effects of gamma radiation on Improvement of drought tolerance were investigated in rice var. tarom (Iranian local rice variety). Fully mature and perfect seeds were Irradiated with 4 doses of gamma radiation (0, 20, 60, 100 Gy). For callus induction, Irradiated and control seeds were surface sterilized and cultured on MS medium supplemented with 2 mgl−1 2, 4-D and 0.2 mgl−1 BA. Analysis of data revealed that, 20 Gy irradiated seeds had the highest rate of germination, callus initiation and callus weight. To study the callus growth in response to osmotic stress, certain amount of embryonic callus was transferred to MS medium, supplemented with PEG at different concentrations (0–25%). After two weeks, the callus growth and proline accumulation were assayed in both control and Irradiated samples. Results revealed that in stressed conditions, pretreatment of seeds with gamma radiation cause a significant increase in callus growth compared to those of controls. Interestingly, the stress didn't increase proline level in calli derived from Irradiated seeds. However, proline accumulated more significantly in control samples, while the growth rate was stili less than Irradiated samples. One way to explain these data is that, the radiation may have promoted the level of antioxidants and consequently there would be no need for extra amount of proline to cope with the same problem of oxidative reagents.
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Claims 8
Claim · model-written summary
Twenty Gy gamma irradiation gave the highest seed germination rate.
- Taxon
- rice
Oryza sativat0 - Treatment
- 20 Gye0
- Outcome
- rate of germinatione0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“20 Gy irradiated seeds had the highest rate of germination, callus initiation and callus weight.”
t0“The study of gamma irradiation effects on drought tolerance in rice (Oryza sativa L.)”
t1“However, proline accumulated more significantly in control samples, while the growth rate was stili less than Irradiated samples.”
Claim · model-written summary
Twenty Gy gamma irradiation gave the highest callus initiation.
- Taxon
- riceOryza sativat0
- Treatment
- 20 Gye0
- Outcome
- callus initiatione0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“20 Gy irradiated seeds had the highest rate of germination, callus initiation and callus weight.”
t0“The study of gamma irradiation effects on drought tolerance in rice (Oryza sativa L.)”
t1“However, proline accumulated more significantly in control samples, while the growth rate was stili less than Irradiated samples.”
Claim · model-written summary
Twenty Gy gamma irradiation gave the highest callus weight.
- Taxon
- riceOryza sativat0
- Treatment
- 20 Gye0
- Outcome
- callus weighte0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“20 Gy irradiated seeds had the highest rate of germination, callus initiation and callus weight.”
t0“The study of gamma irradiation effects on drought tolerance in rice (Oryza sativa L.)”
t1“However, proline accumulated more significantly in control samples, while the growth rate was stili less than Irradiated samples.”
Claim · model-written summary
Under osmotic stress, gamma irradiated seeds produced significantly greater callus growth than controls.
- Taxon
- riceOryza sativat0
- Treatment
- pretreatment of seeds with gamma radiatione0
- Outcome
- callus growthe0
- Direction
- increasee0
- Qualifier
- stressed conditionse0
- Comparator
- controlse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in stressed conditions, pretreatment of seeds with gamma radiation cause a significant increase in callus growth compared to those of controls.”
t0“The study of gamma irradiation effects on drought tolerance in rice (Oryza sativa L.)”
t1“However, proline accumulated more significantly in control samples, while the growth rate was stili less than Irradiated samples.”
Claim · model-written summary
Osmotic stress did not raise proline in calli from irradiated seeds.
- Taxon
- riceOryza sativat0
- Organ / stage
- callie0
- Treatment
- stresse0
- Outcome
- proline levele0
- Direction
- didn't increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the stress didn't increase proline level in calli derived from Irradiated seeds.”
t0“The study of gamma irradiation effects on drought tolerance in rice (Oryza sativa L.)”
t1“However, proline accumulated more significantly in control samples, while the growth rate was stili less than Irradiated samples.”
Claim · model-written summary
Under stress, control calli accumulated significantly more proline than irradiated calli.
- Taxon
- riceOryza sativat0
- Organ / stage
- callie1
- Treatment
- control samplese0
- Outcome
- prolinee0
- Direction
- moree0
- Comparator
- Irradiated samplese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“proline accumulated more significantly in control samples, while the growth rate was stili less than Irradiated samples.”
t0“The study of gamma irradiation effects on drought tolerance in rice (Oryza sativa L.)”
t1“However, proline accumulated more significantly in control samples, while the growth rate was stili less than Irradiated samples.”
e1“the stress didn't increase proline level in calli derived from Irradiated seeds.”
Claim · model-written summary
Control callus growth rate remained below irradiated samples under stress.
- Taxon
- riceOryza sativat0
- Treatment
- control samplest1
- Outcome
- growth ratee0
- Direction
- lesse0
- Comparator
- Irradiated samplese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the growth rate was stili less than Irradiated samples.”
t0“The study of gamma irradiation effects on drought tolerance in rice (Oryza sativa L.)”
t1“However, proline accumulated more significantly in control samples, while the growth rate was stili less than Irradiated samples.”
Claim · model-written summary
The authors propose that irradiation may raise antioxidants, reducing the need for extra proline under oxidative stress.
- Taxon
- riceOryza sativat0
- Treatment
- radiatione0
- Outcome
- level of antioxidantse0
- Qualifier
- may have promotede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the radiation may have promoted the level of antioxidants and consequently there would be no need for extra amount of proline to cope with the same problem of oxidative reagents.”
t0“The study of gamma irradiation effects on drought tolerance in rice (Oryza sativa L.)”
t1“However, proline accumulated more significantly in control samples, while the growth rate was stili less than Irradiated samples.”
The same questions in other papers
radiation · growth · Oryza sativa (rice)Results differ
21 papers in the same direction as this paper · 60 in the opposite direction · 2 reporting no difference from an alternative
- negative
- no effect
- negative
80 papers more in this group
See all 84 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.