Abstract
The seeds of castor bean were used to investigate the effects of different doses of 60 Co γ-rays irradiation(200～1 500 Gy) with 10 Gy/min high irradiation rate on seed germination,seedling emergence,seedling growth and physiological characteristics.The results showed that there were no obvious discrepancies in the last seed germination rate among the eight different dosages,however,the percentage of seedling emergence,radicle length and seedling height were significantly influenced by irradiation dosage.When the irradiation dosage was above 1 000 Gy,the growth of seeds and seedlings were distinctly suppressed,radicle became short and thick,seedling height decreased markedly,and the rate of seedling emergence also dramatically reduced.With the gradual enhancement of irradiation dosage,the content of malondialdehyde(MDA),the activities of superoxide dismutase(SOD) and peroxidase(POD) were increased at first,and then declined,and the largest value was presented at the 1 000 Gy irradiation.The regression analysis between the seedling emergence rate and the irradiation dosage showed that the half lethal dosage(LD50) and the critical dosage(LD40) were 1 048.83 Gy and 1 134.21 Gy respectively.Combining with the consideration of seed germination,seedling growth and factual seedling emergence,the appropriate dosage of 60 Co γ-rays irradiation-induced mutation for 'Zibi5' castor bean seeds was about 900 Gy(more than 800 Gy and less than 1 000 Gy) with 10 Gy/min irradiation rate.
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Claims 12
Claim · model-written summary
Final seed germination rate showed no obvious differences among irradiation doses.
- Taxon
- castor bean
Ricinus communist0 - Treatment
- eight different dosagese0
- Outcome
- last seed germination ratee0
- Direction
- no obvious discrepanciese0
- Comparator
- eight different dosagese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“there were no obvious discrepancies in the last seed germination rate among the eight different dosages”
t0“Castor Bean”
Claim · model-written summary
Irradiation dosage significantly affected seedling emergence, radicle length and seedling height.
- Taxon
- castor beanRicinus communist0
- Treatment
- irradiation dosagee0
- Outcome
- percentage of seedling emergence,radicle length and seedling heighte0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the percentage of seedling emergence,radicle length and seedling height were significantly influenced by irradiation dosage”
t0“Castor Bean”
Claim · model-written summary
Above 1 000 Gy, growth of seeds and seedlings was suppressed.
- Taxon
- castor beanRicinus communist0
- Treatment
- irradiation dosage was above 1 000 Gye0
- Outcome
- growth of seeds and seedlingse0
- Direction
- suppressede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When the irradiation dosage was above 1 000 Gy,the growth of seeds and seedlings were distinctly suppressed,radicle became short and thick,seedling height decreased markedly,and the rate of seedling emergence also dramatically reduced”
t0“Castor Bean”
Claim · model-written summary
Above 1 000 Gy, radicle was short and thick.
- Taxon
- castor beanRicinus communist0
- Treatment
- irradiation dosage was above 1 000 Gye0
- Outcome
- radiclee0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When the irradiation dosage was above 1 000 Gy,the growth of seeds and seedlings were distinctly suppressed,radicle became short and thick,seedling height decreased markedly,and the rate of seedling emergence also dramatically reduced”
t0“Castor Bean”
Claim · model-written summary
Above 1 000 Gy, seedling height was decreased.
- Taxon
- castor beanRicinus communist0
- Treatment
- irradiation dosage was above 1 000 Gye0
- Outcome
- seedling heighte0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When the irradiation dosage was above 1 000 Gy,the growth of seeds and seedlings were distinctly suppressed,radicle became short and thick,seedling height decreased markedly,and the rate of seedling emergence also dramatically reduced”
t0“Castor Bean”
Claim · model-written summary
Above 1 000 Gy, rate of seedling emergence was reduced.
- Taxon
- castor beanRicinus communist0
- Treatment
- irradiation dosage was above 1 000 Gye0
- Outcome
- rate of seedling emergencee0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When the irradiation dosage was above 1 000 Gy,the growth of seeds and seedlings were distinctly suppressed,radicle became short and thick,seedling height decreased markedly,and the rate of seedling emergence also dramatically reduced”
t0“Castor Bean”
Claim · model-written summary
content of malondialdehyde(MDA) rose then fell as irradiation dosage increased, peaking at 1 000 Gy.
- Taxon
- castor beanRicinus communist0
- Treatment
- irradiation dosagee0
- Outcome
- content of malondialdehyde(MDA)e0
- Direction
- increased at first,and then declinede0
- Qualifier
- 1 000 Gy irradiatione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“With the gradual enhancement of irradiation dosage,the content of malondialdehyde(MDA),the activities of superoxide dismutase(SOD) and peroxidase(POD) were increased at first,and then declined,and the largest value was presented at the 1 000 Gy irradiation”
t0“Castor Bean”
Claim · model-written summary
activities of superoxide dismutase(SOD) rose then fell as irradiation dosage increased, peaking at 1 000 Gy.
- Taxon
- castor beanRicinus communist0
- Treatment
- irradiation dosagee0
- Outcome
- activities of superoxide dismutase(SOD)e0
- Direction
- increased at first,and then declinede0
- Qualifier
- 1 000 Gy irradiatione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“With the gradual enhancement of irradiation dosage,the content of malondialdehyde(MDA),the activities of superoxide dismutase(SOD) and peroxidase(POD) were increased at first,and then declined,and the largest value was presented at the 1 000 Gy irradiation”
t0“Castor Bean”
Claim · model-written summary
peroxidase(POD) rose then fell as irradiation dosage increased, peaking at 1 000 Gy.
- Taxon
- castor beanRicinus communist0
- Treatment
- irradiation dosagee0
- Outcome
- peroxidase(POD)e0
- Direction
- increased at first,and then declinede0
- Qualifier
- 1 000 Gy irradiatione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“With the gradual enhancement of irradiation dosage,the content of malondialdehyde(MDA),the activities of superoxide dismutase(SOD) and peroxidase(POD) were increased at first,and then declined,and the largest value was presented at the 1 000 Gy irradiation”
t0“Castor Bean”
Claim · model-written summary
half lethal dosage(LD50) for seedling emergence was 1 048.83 Gy.
- Taxon
- castor beanRicinus communist0
- Outcome
- half lethal dosage(LD50)e0
- Value
- 1 048.83 Gye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The regression analysis between the seedling emergence rate and the irradiation dosage showed that the half lethal dosage(LD50) and the critical dosage(LD40) were 1 048.83 Gy and 1 134.21 Gy respectively”
t0“Castor Bean”
Claim · model-written summary
critical dosage(LD40) for seedling emergence was 1 134.21 Gy.
- Taxon
- castor beanRicinus communist0
- Outcome
- critical dosage(LD40)e0
- Value
- 1 134.21 Gye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The regression analysis between the seedling emergence rate and the irradiation dosage showed that the half lethal dosage(LD50) and the critical dosage(LD40) were 1 048.83 Gy and 1 134.21 Gy respectively”
t0“Castor Bean”
Claim · model-written summary
About 900 Gy at 10 Gy/min was recommended for irradiation-induced mutation of Zibi5 seeds.
- Taxon
- castor beanRicinus communise0
- Material
- 'Zibi5'e0
- Outcome
- appropriate dosage of 60 Co γ-rays irradiation-induced mutatione0
- Value
- about 900 Gye0
- Qualifier
- 10 Gy/min irradiation ratee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the appropriate dosage of 60 Co γ-rays irradiation-induced mutation for 'Zibi5' castor bean seeds was about 900 Gy(more than 800 Gy and less than 1 000 Gy) with 10 Gy/min irradiation rate”
The same questions in other papers
radiation · growth · Ricinus communis (castor bean)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.