Abstract
SummaryThe effects of 14 meV neutrons were compared with those of 60Co γ-rays in barley seeds. After irradiation the seeds were germinated on wet filter paper and the lengths of the first leaf and coleoptiles were measured. The results for leaf growth can be fitted to an exponential function down to 20 per cent decrease for both types of irradiation. The mean RBE was found to be 11·0 ± 1·4. Coleoptile growth showed initially an exponential response to gamma and neutron irradiation. The exponential parts gave a mean RBE of 5·1 ± 0·36. Both RBE values (11·0 and 5·1) are calculated from the doses stated as rads in water at the position of the seeds. When the elemental composition of the barley plant is taken into account the RBE values become 14·5 for leaf growth and 6·6 for coleoptile growth.
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Claims 6
Claim · model-written summary
Leaf growth responses to both irradiation types fit an exponential function down to a 20 per cent decrease.
- Taxon
- Barley
.jpg?width=60)
Hordeum vulgaret0 - Outcome
- leaf growthe0
- Direction
- decreasee0
- Value
- 20 per cente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“The results for leaf growth can be fitted to an exponential function down to 20 per cent decrease for both types of irradiation.”
t0“Barley”
Claim · model-written summary
Mean RBE for leaf growth was 11·0 ± 1·4 based on water dose.
- Taxon
- BarleyHordeum vulgaret0
- Outcome
- RBEe0
- Value
- 11·0 ± 1·4e0
- Qualifier
- rads in water at the position of the seedse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The mean RBE was found to be 11·0 ± 1·4.”
e1“Both RBE values (11·0 and 5·1) are calculated from the doses stated as rads in water at the position of the seeds.”
t0“Barley”
Claim · model-written summary
Coleoptile growth initially had an exponential irradiation response.
- Taxon
- BarleyHordeum vulgaret0
- Treatment
- gamma and neutron irradiatione0
- Outcome
- Coleoptile growthe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Coleoptile growth showed initially an exponential response to gamma and neutron irradiation.”
t0“Barley”
Claim · model-written summary
Mean RBE for coleoptile growth was 5·1 ± 0·36.
- Taxon
- BarleyHordeum vulgaret0
- Outcome
- RBEe0
- Value
- 5·1 ± 0·36e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The exponential parts gave a mean RBE of 5·1 ± 0·36.”
t0“Barley”
Claim · model-written summary
Composition adjustment raised the leaf growth RBE to 14·5.
- Taxon
- barleyHordeum vulgaree0
- Organ / stage
- leafe0
- Outcome
- RBE valuese0
- Value
- 14·5e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When the elemental composition of the barley plant is taken into account the RBE values become 14·5 for leaf growth and 6·6 for coleoptile growth.”
Claim · model-written summary
Composition adjustment raised the coleoptile growth RBE to 6·6.
- Taxon
- barleyHordeum vulgaree0
- Organ / stage
- coleoptilee0
- Outcome
- RBE valuese0
- Value
- 6·6e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When the elemental composition of the barley plant is taken into account the RBE values become 14·5 for leaf growth and 6·6 for coleoptile growth.”