Abstract
When dry barley seeds are irradiated with large doses of x radiation, a reversion of the curve of coleoptile heights is noticed. This reversion is caused by a cellular elongation increasing with the dose, as is also shown in experiments with algae, mosses, and ferns. The effects of hydration, latency time, temperature, and radioprotective substances on the radiosensitivity of the seed was studied. The cellular elongation increases with the dose except at extreme temperatures (--15 to 40 deg C) and on the incorporation of cystamine after irradiation. No other factors increase the cellular elongation. The effect of hydrogen peroxide is analogous to that of the x radiation, and, on this basis, a hypothesis is discussed. (tr-auth)
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Claims 5
Claim · model-written summary
Large x-radiation doses reversed the barley coleoptile-height curve.
- Taxon
- barley
.jpg?width=60)
Hordeum vulgaree0 - Treatment
- large doses of x radiatione0
- Outcome
- reversion of the curve of coleoptile heightse0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“When dry barley seeds are irradiated with large doses of x radiation, a reversion of the curve of coleoptile heights is noticed.”
Claim · model-written summary
Cellular elongation rose with radiation dose.
- Taxon
- barleyHordeum vulgaret0
- Treatment
- dosee0
- Outcome
- cellular elongatione0
- Direction
- increasinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This reversion is caused by a cellular elongation increasing with the dose, as is also shown in experiments with algae, mosses, and ferns.”
t0“BARLEY SEED”
Claim · model-written summary
Cellular elongation did not rise with dose at extreme temperatures.
- Taxon
- barleyHordeum vulgaret0
- Treatment
- extreme temperatures (--15 to 40 deg C)e0
- Outcome
- cellular elongatione0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The cellular elongation increases with the dose except at extreme temperatures (--15 to 40 deg C)”
t0“BARLEY SEED”
Claim · model-written summary
Cystamine after irradiation prevented the dose-related cellular elongation.
- Taxon
- barleyHordeum vulgaret0
- Treatment
- incorporation of cystamine after irradiatione0
- Outcome
- cellular elongatione0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“and on the incorporation of cystamine after irradiation. No other factors increase the cellular elongation.”
t0“BARLEY SEED”
Claim · model-written summary
Hydrogen peroxide had an effect analogous to x radiation.
- Taxon
- barleyHordeum vulgaret0
- Treatment
- hydrogen peroxidee0
- Outcome
- effect of hydrogen peroxidee0
- Comparator
- x radiatione0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The effect of hydrogen peroxide is analogous to that of the x radiation”
t0“BARLEY SEED”