Abstract
SummaryThe effects of 300 kVp x-rays and 14 MeV neutrons on the geotropic response and the sedimentation of statoliths in the statocytes of barley roots have been studied. 24 hours after irradiation with 100 rads of x-rays or 60 rads of 14 MeV neutrons in air, the geotropic response was inhibited by 25 and 15 per cent, respectively. Higher doses up to 800 rads of x-rays or 220 rads of neutrons had no greater effect. Irradiation in the absence of oxygen did not affect the geotropic response, and a slight enhancement was observed. Sedimentation of statoliths was slowed down after irradiation in air and speeded up after irradiation in the absence of oxygen. The hypothesis is put forward that the effects of radiation on geotropic response are due to the changes in the viscosity of the protoplasm; irradiation in air increases the viscosity; whereas irradiation in the absence of oxygen decreases it. Mechanisms for the effects of radiation on the viscosity of the protoplasm are suggested.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 6
Claim · model-written summary
X-rays inhibited geotropism 25% after 24 hours in air.
- Taxon
- barley roots
.jpg?width=60)
Hordeum vulgaret0 - Treatment
- 100 rads of x-rayse0
- Outcome
- geotropic responsee0
- Direction
- inhibitede0
- Value
- 25e0
- Setting
- in aire0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“24 hours after irradiation with 100 rads of x-rays or 60 rads of 14 MeV neutrons in air, the geotropic response was inhibited by 25 and 15 per cent, respectively”
t0“Barley Roots”
Claim · model-written summary
Neutrons inhibited geotropism 15% after 24 hours in air.
- Taxon
- barley rootsHordeum vulgaret0
- Treatment
- 60 rads of 14 MeV neutronse0
- Outcome
- geotropic responsee0
- Direction
- inhibitede0
- Value
- 15 per cente0
- Setting
- in aire0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“24 hours after irradiation with 100 rads of x-rays or 60 rads of 14 MeV neutrons in air, the geotropic response was inhibited by 25 and 15 per cent, respectively”
t0“Barley Roots”
Claim · model-written summary
Higher doses had no greater geotropic effect.
- Taxon
- barley rootsHordeum vulgaret0
- Outcome
- no greater effecte0
- Direction
- no greatere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Higher doses up to 800 rads of x-rays or 220 rads of neutrons had no greater effect”
t0“Barley Roots”
Claim · model-written summary
Irradiation without oxygen slightly enhanced geotropism.
- Taxon
- barley rootsHordeum vulgaret0
- Treatment
- Irradiation in the absence of oxygene0
- Outcome
- geotropic responsee0
- Direction
- enhancemente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Irradiation in the absence of oxygen did not affect the geotropic response, and a slight enhancement was observed”
t0“Barley Roots”
Claim · model-written summary
Irradiation in air slowed statolith sedimentation.
- Taxon
- barley rootsHordeum vulgaret0
- Treatment
- irradiation in aire0
- Outcome
- Sedimentation of statolithse0
- Direction
- slowed downe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sedimentation of statoliths was slowed down after irradiation in air”
t0“Barley Roots”
Claim · model-written summary
Irradiation without oxygen sped statolith sedimentation.
- Taxon
- barley rootsHordeum vulgaret0
- Treatment
- irradiation in the absence of oxygene0
- Outcome
- speeded upe0
- Direction
- speeded upe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“speeded up after irradiation in the absence of oxygen”
t0“Barley Roots”
The same questions in other papers
radiation · soil: physics · Hordeum vulgare (barley)Positive and negative results
3 in the opposite direction
- negative
- negative
- 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.