Abstract
This experiment was carried out to increase the cultivation area of rape (Brassica napus) and develop this plant as a biodiesel so dry seeds of 3 cultivars, ‘Naehan’, ‘Hanla’, and ‘Tammi’ were irradiated with proton ion and gamma-ray at range of 0 to 2,000 Gy and then radiosensitivity of M1 generation were investigated. The germination rate were more than 95.3% regardless of radiation source, dosage and cultivar and emergence rate at 6 days after sowing were decreased by increasing dosage but those of 12 days as more than 91.7% were similar all together. Survival rate in 1,000 Gy and below at 7 weeks after sowing were similar but remarkably reduced 38.1～84.1% in 1,500 Gy and 2,000 Gy. The length and area of cotyledon, and hypocotyl length in all 3 cultivars were badly reduced with high significancy by increasing dosage of proton ion and gamma-ray irradiation and sensitive responses were showed in order of ‘Naehan’, ‘Hanla’, and ‘Tammi’. On the other hand, there was hormesis that the length and area of cotyledon were more increased at 100～200 Gy in the proton ion than control in ‘Tammi’. Chlorophyll content, number of true leaves and leaf area at 1 month after sowing were decreased by increasing radiation dosage regardless of radiation source so had high significancy. As the cotyledons at 1 month after sowing almost showed chlorosis in more than 800 Gy and chlorosis was especially serious in ‘Tammi’. The number of true leaves was about 2.3 in control and the low level of dosage but cotyledon didn’t grow in the high level dosage of 1,500 Gy and over. And the dosage in which leaf area was reduced to 50% compared to that of control were 800 Gy in ‘Naehan’ and 1,500 Gy in ‘Tammi’ and ‘Hanla’ by proton ion and 400 Gy in ‘Tammi’, 1,500 Gy both ‘Naehan’ and ‘Hanla’ by gamma-ray. The fresh weight of top land than root was more sensitive so dosage in which fresh weight reduced to 50% compared to that of control were 600 Gy in ‘Naehan’ and 1,000 Gy both ‘Tammi’ and ‘Hanla’. As the results, growth of seedling decreased over 50% in more than 1,000 Gy with high sensitivity to radiation and so it was appeared that proper dosage for mutation breeding in rape was 1,000 Gy and below.
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Claims 11
Claim · model-written summary
Germination exceeded 95.3% across irradiation sources, doses and cultivars.
- Taxon
- Brassica napus
_Brassica_napus_-_Habit.jpg?width=60)
Brassica napust0 - Outcome
- germination ratee0
- Value
- more than 95.3%e0
- Qualifier
- regardless of radiation source, dosage and cultivare0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Brassica_napus_-_Habit.jpg?width=500)
Verbatim
e0“The germination rate were more than 95.3% regardless of radiation source, dosage and cultivar”
t0“Brassica napus”
Claim · model-written summary
Emergence at day 6 decreased with increasing radiation dose.
- Taxon
- Brassica napusBrassica napust0
- Treatment
- increasing dosagee0
- Outcome
- emergence ratee0
- Direction
- decreasede0
- Qualifier
- 6 days after sowinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“emergence rate at 6 days after sowing were decreased by increasing dosage”
t0“Brassica napus”
Claim · model-written summary
Emergence at day 12 exceeded 91.7% and was similar across treatments.
- Taxon
- Brassica napusBrassica napust0
- Outcome
- emergence ratee1
- Direction
- similare0
- Value
- more than 91.7%e0
- Qualifier
- 12 dayse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“those of 12 days as more than 91.7% were similar all together”
e1“emergence rate at 6 days after sowing”
t0“Brassica napus”
Claim · model-written summary
Seedling survival was similar at doses up to 1,000 Gy, then fell markedly at 1,500 and 2,000 Gy.
- Taxon
- Brassica napusBrassica napust0
- Treatment
- 1,500 Gy and 2,000 Gye0
- Outcome
- Survival ratee0
- Direction
- reducede0
- Value
- 38.1～84.1%e0
- Comparator
- 1,000 Gy and belowe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Survival rate in 1,000 Gy and below at 7 weeks after sowing were similar but remarkably reduced 38.1～84.1% in 1,500 Gy and 2,000 Gy”
t0“Brassica napus”
Claim · model-written summary
Increasing irradiation dose reduced cotyledon length and area and hypocotyl length significantly.
- Taxon
- Brassica napusBrassica napust0
- Treatment
- increasing dosage of proton ion and gamma-ray irradiatione0
- Outcome
- length and area of cotyledon, and hypocotyl lengthe0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The length and area of cotyledon, and hypocotyl length in all 3 cultivars were badly reduced with high significancy by increasing dosage of proton ion and gamma-ray irradiation”
t0“Brassica napus”
Claim · model-written summary
Naehan, Hanla and Tammi ranked in decreasing irradiation sensitivity.
- Taxon
- Brassica napusBrassica napust0
- Outcome
- sensitive responsese0
- Qualifier
- in order of ‘Naehan’, ‘Hanla’, and ‘Tammi’e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“sensitive responses were showed in order of ‘Naehan’, ‘Hanla’, and ‘Tammi’”
t0“Brassica napus”
Claim · model-written summary
Proton irradiation at 100～200 Gy increased Tammi cotyledon length and area versus control.
- Taxon
- Brassica napusBrassica napust0
- Material
- ‘Tammi’e0
- Treatment
- 100～200 Gy in the proton ione0
- Outcome
- length and area of cotyledone0
- Direction
- increasede0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the length and area of cotyledon were more increased at 100～200 Gy in the proton ion than control in ‘Tammi’”
t0“Brassica napus”
Claim · model-written summary
Increasing radiation dosage decreased chlorophyll content, true-leaf number and leaf area significantly.
- Taxon
- Brassica napusBrassica napust0
- Treatment
- increasing radiation dosagee0
- Outcome
- Chlorophyll content, number of true leaves and leaf areae0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Chlorophyll content, number of true leaves and leaf area at 1 month after sowing were decreased by increasing radiation dosage regardless of radiation source so had high significancy”
t0“Brassica napus”
Claim · model-written summary
Cotyledon chlorosis occurred above 800 Gy and was especially serious in Tammi.
- Taxon
- Brassica napusBrassica napust0
- Material
- ‘Tammi’e0
- Treatment
- more than 800 Gye0
- Outcome
- chlorosise0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“cotyledons at 1 month after sowing almost showed chlorosis in more than 800 Gy and chlorosis was especially serious in ‘Tammi’”
t0“Brassica napus”
Claim · model-written summary
Control and low-dose plants had about 2.3 true leaves; cotyledons did not grow at 1,500 Gy or above.
- Taxon
- Brassica napusBrassica napust0
- Outcome
- number of true leavese0
- Value
- about 2.3e0
- Qualifier
- control and the low level of dosagee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The number of true leaves was about 2.3 in control and the low level of dosage but cotyledon didn’t grow in the high level dosage of 1,500 Gy and over”
t0“Brassica napus”
Claim · model-written summary
The recommended radiation dose for mutation breeding was 1,000 Gy or below.
- Taxon
- Brassica napusBrassica napust0
- Outcome
- proper dosage for mutation breeding in rapee0
- Value
- 1,000 Gy and belowe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“proper dosage for mutation breeding in rape was 1,000 Gy and below”
t0“Brassica napus”
The same questions in other papers
radiation · growth · Brassica napus (oilseed rape)Positive and negative results
7 papers in the same direction as this paper · 2 in the opposite direction
- positive
- positive
- no effect
6 papers more in this group
See all 10 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.