Abstract
BACKGROUND: This work focuses on the effect of accelerated electrons (0.1-6.2 kGy) on naturally attached fungi on maize seeds. The fungal viability and corresponding inactivation kinetics were determined. The inactivation and radiosensitivity of the most abundant species in the contaminant fungi detected on maize seeds (Aspergillus spp., Penicillium spp. and Fusarium spp.) are discussed. RESULTS: Fungal contamination of maize seeds decreased significantly with increasing irradiation dose. The survival curve of total fungi determined by the blotter test showed a sigmoidal pattern that can be attributed to the mixture of fungal subpopulations with different radiation sensitivities. This behaviour could be modelled well (R² = 0.995) with a modified Gompertz equation. The predicted values for shoulder length and inactivation rate were 0.63 ± 0.10 kGy and 0.44 ± 0.04 kGy⁻¹ respectively. The sensitivity of the most common fungi to electron beam treatment followed the order Penicillium spp. > Fusarium spp. > Aspergillus spp., with total inactivation at irradiation doses of 1.7, 2.5 and 4.8 kGy respectively. CONCLUSION: The effect of electron beam treatment against fungi on naturally contaminated maize seeds depended on irradiation dose, allowing the control of maize fungal load.
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Claims 8
Claim · model-written summary
Fungal contamination of maize seeds declined significantly with irradiation dose.
- Organ / stage
- seedse0
- Treatment
- irradiation dosee0
- Interactor
- Fungale0pathogen
- Outcome
- Fungal contamination of maize seedse0
- Direction
- decreasede0
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“maize seeds”
e0“Fungal contamination of maize seeds decreased significantly with increasing irradiation dose.”
Claim · model-written summary
Total fungi survival followed a sigmoidal pattern.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“maize seeds”
e0“The survival curve of total fungi determined by the blotter test showed a sigmoidal pattern”
Claim · model-written summary
A modified Gompertz equation fitted fungal survival well.
Not reportedInteractor
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“maize seeds”
e0“This behaviour could be modelled well (R² = 0.995) with a modified Gompertz equation.”
Claim · model-written summary
Predicted shoulder length was 0.63 ± 0.10 kGy.
Not reportedInteractor
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“maize seeds”
e0“The predicted values for shoulder length and inactivation rate were 0.63 ± 0.10 kGy and 0.44 ± 0.04 kGy⁻¹ respectively.”
Claim · model-written summary
Predicted inactivation rate was 0.44 ± 0.04 kGy⁻¹.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“maize seeds”
e0“The predicted values for shoulder length and inactivation rate were 0.63 ± 0.10 kGy and 0.44 ± 0.04 kGy⁻¹ respectively.”
Claim · model-written summary
Penicillium spp. were totally inactivated at 1.7 kGy.
- Treatment
- irradiation dosese0
- Interactor
- Penicillium spp.
Penicilliume0pathogen - Outcome
- total inactivatione0
- Value
- 1.7e0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“maize seeds”
e0“Penicillium spp. > Fusarium spp. > Aspergillus spp., with total inactivation at irradiation doses of 1.7, 2.5 and 4.8 kGy respectively”
Claim · model-written summary
Fusarium spp. were totally inactivated at 2.5 kGy.
FusariumNot reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“maize seeds”
e0“Penicillium spp. > Fusarium spp. > Aspergillus spp., with total inactivation at irradiation doses of 1.7, 2.5 and 4.8 kGy respectively”
Claim · model-written summary
Aspergillus spp. were totally inactivated at 4.8 kGy.
- Treatment
- irradiation dosese0
- Interactor
- Aspergillus spp.
Aspergilluse0pathogen - Outcome
- total inactivatione0
- Value
- 4.8 kGye0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“maize seeds”
e0“Penicillium spp. > Fusarium spp. > Aspergillus spp., with total inactivation at irradiation doses of 1.7, 2.5 and 4.8 kGy respectively”
The same questions in other papers
radiation · Fusarium · Zea mays (maize)Results agree
1 paper in the same direction as this paper
- positive
radiation · organism · Zea mays (maize)Results agree
3 papers in the same direction as this paper
- positive
- positive
- positive
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.