Abstract
The effect of gamma-, 14 MeV neutron- and fission neutron irradiation was investigated on the growth rate and degrading enzyme activities of pea seedlings. Both dormant pea seeds and 4-day-old growing seedlings were used for the experiments. Depending on the gamma dose between 15 and 300 Gy the height of pea seedlings was found shorter, and parallel with this the endogenous RNase and peroxidase activities were higher than in the unirradiated controls. Seedlings proved to be more sensitive by about one order of magnitude than seeds. Irradiation of seeds between 5 and 10 Gy slightly enhanced the growth rate of seedlings (10 per cent) and parallel with this, the RNase activity measured was lower than that in the controls. On irradiation of seedlings with 14 MeV neutrons the growth inhibition and RNase activity enhancement was only 1.3 times more effective than in the case of irradiation of seeds. The following RBE values were obtained after irradiation of seeds, related to the biological effect of gamma rays: in growth inhibition, 6 for 14 MeV neutrons and 12 for fission neutrons, and the enhancement of two enzyme activities was 15-30 for 14 MeV neutrons and 45-58 for fission neutrons. In the case of seedling irradiation with 14 MeV neutrons the RBE was 1.0 for growth inhibition and between 3 and 6 for enhancement of enzyme activity. The isoenzyme pattern of RNase also changed: two isoenzymes became predominant after the gamma irradiation of seeds, characterized by molecular weights of 21,000 and 30,000, respectively. As a result of enhanced RNase activity, the degradation of longer polysomes to monomeric ribosomes occurred. Thus after ionizing irradiation of pea seeds and seedlings an inverse correlation was found between the growth rate of pea seedlings and the activities of degrading enzymes.
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Claims 15
Claim · model-written summary
Gamma irradiation shortened pea seedlings.
- Taxon
- pea
Lathyrus oleraceuse0 - Treatment
- gamma dose between 15 and 300 Gye0
- Outcome
- height of pea seedlingse0
- Direction
- shortere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Depending on the gamma dose between 15 and 300 Gy the height of pea seedlings was found shorter”
Claim · model-written summary
Gamma irradiation increased endogenous RNase and peroxidase activities.
- Taxon
- PeaLathyrus oleraceust0
- Treatment
- gamma dose between 15 and 300 Gye0
- Outcome
- endogenous RNase and peroxidase activitiese0
- Direction
- highere0
- Comparator
- unirradiated controlse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Depending on the gamma dose between 15 and 300 Gy the height of pea seedlings was found shorter, and parallel with this the endogenous RNase and peroxidase activities were higher than in the unirradiated controls.”
t0“Pea”
Claim · model-written summary
Seedlings were about tenfold more sensitive than seeds.
- Taxon
- PeaLathyrus oleraceust0
- Outcome
- sensitivee0
- Direction
- moree0
- Value
- one order of magnitudee0
- Comparator
- seedse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seedlings proved to be more sensitive by about one order of magnitude than seeds.”
t0“Pea”
Claim · model-written summary
Irradiation of seeds at 5–10 Gy enhanced seedling growth rate by 10 per cent.
- Taxon
- PeaLathyrus oleraceust0
- Treatment
- Irradiation of seeds between 5 and 10 Gye0
- Outcome
- growth rate of seedlingse0
- Direction
- enhancede0
- Value
- 10 per cente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Irradiation of seeds between 5 and 10 Gy slightly enhanced the growth rate of seedlings (10 per cent)”
t0“Pea”
Claim · model-written summary
Irradiation of seeds at 5–10 Gy lowered RNase activity.
- Taxon
- PeaLathyrus oleraceust0
- Treatment
- Irradiation of seeds between 5 and 10 Gye0
- Outcome
- RNase activitye0
- Direction
- lowere0
- Comparator
- the controlse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Irradiation of seeds between 5 and 10 Gy slightly enhanced the growth rate of seedlings (10 per cent) and parallel with this, the RNase activity measured was lower than that in the controls.”
t0“Pea”
Claim · model-written summary
Seedling neutron irradiation was 1.3 times more effective for growth inhibition and RNase enhancement than seed irradiation.
- Taxon
- PeaLathyrus oleraceust0
- Outcome
- growth inhibition and RNase activity enhancemente0
- Direction
- more effectivee0
- Value
- 1.3 timese0
- Comparator
- irradiation of seedse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“On irradiation of seedlings with 14 MeV neutrons the growth inhibition and RNase activity enhancement was only 1.3 times more effective than in the case of irradiation of seeds.”
t0“Pea”
Claim · model-written summary
After seed irradiation, growth inhibition RBE was 6 for 14 MeV neutrons.
- Taxon
- PeaLathyrus oleraceust0
- Treatment
- 14 MeV neutronse0
- Outcome
- growth inhibitione0
- Value
- 6e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in growth inhibition, 6 for 14 MeV neutrons and 12 for fission neutrons”
t0“Pea”
Claim · model-written summary
After seed irradiation, growth inhibition RBE was 12 for fission neutrons.
- Taxon
- PeaLathyrus oleraceust0
- Treatment
- fission neutronse0
- Outcome
- growth inhibitione0
- Value
- 12e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in growth inhibition, 6 for 14 MeV neutrons and 12 for fission neutrons”
t0“Pea”
Claim · model-written summary
After seed irradiation, enzyme activity enhancement RBE was 15-30 for 14 MeV neutrons.
- Taxon
- PeaLathyrus oleraceust0
- Treatment
- 14 MeV neutronse0
- Outcome
- enhancement of two enzyme activitiese0
- Value
- 15-30e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the enhancement of two enzyme activities was 15-30 for 14 MeV neutrons and 45-58 for fission neutrons”
t0“Pea”
Claim · model-written summary
After seed irradiation, enzyme activity enhancement RBE was 45-58 for fission neutrons.
- Taxon
- PeaLathyrus oleraceust0
- Treatment
- fission neutronse0
- Outcome
- enhancement of two enzyme activitiese0
- Value
- 45-58e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the enhancement of two enzyme activities was 15-30 for 14 MeV neutrons and 45-58 for fission neutrons”
t0“Pea”
Claim · model-written summary
After seedling neutron irradiation, growth inhibition RBE was 1.0.
- Taxon
- PeaLathyrus oleraceust0
- Treatment
- seedling irradiation with 14 MeV neutronse0
- Outcome
- growth inhibitione0
- Value
- 1.0e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the case of seedling irradiation with 14 MeV neutrons the RBE was 1.0 for growth inhibition”
t0“Pea”
Claim · model-written summary
After seedling neutron irradiation, enzyme activity enhancement RBE was between 3 and 6.
- Taxon
- PeaLathyrus oleraceust0
- Outcome
- enhancement of enzyme activitye0
- Value
- between 3 and 6e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“between 3 and 6 for enhancement of enzyme activity”
t0“Pea”
Claim · model-written summary
Gamma seed irradiation changed the RNase isoenzyme pattern, with two predominant isoenzymes.
- Taxon
- PeaLathyrus oleraceust0
- Treatment
- gamma irradiation of seedse0
- Outcome
- isoenzyme pattern of RNasee0
- Direction
- changede0
- Value
- 21,000 and 30,000e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The isoenzyme pattern of RNase also changed: two isoenzymes became predominant after the gamma irradiation of seeds, characterized by molecular weights of 21,000 and 30,000, respectively.”
t0“Pea”
Claim · model-written summary
Enhanced RNase activity was associated with degradation of longer polysomes to monomeric ribosomes.
- Taxon
- PeaLathyrus oleraceust0
- Gene
- RNasee0
- Outcome
- degradation of longer polysomes to monomeric ribosomese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“As a result of enhanced RNase activity, the degradation of longer polysomes to monomeric ribosomes occurred.”
t0“Pea”
Claim · model-written summary
Seedling growth rate and degrading enzyme activities were inversely correlated after irradiation.
- Taxon
- peaLathyrus oleraceuse0
- Treatment
- ionizing irradiatione0
- Outcome
- growth rate of pea seedlingse0
- Direction
- inverse correlatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“after ionizing irradiation of pea seeds and seedlings an inverse correlation was found between the growth rate of pea seedlings and the activities of degrading enzymes.”
The same questions in other papers
radiation · growth · Lathyrus oleraceus (pea)Results differ
5 papers in the same direction as this paper · 20 in the opposite direction · 1 reporting no difference from an alternative
- negative
- negative
- no effect
23 papers more in this group
See all 27 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.