Abstract
OBJECTIVE: Heavy ion beam, which has emerged as a new mutagen in the mutation breeding of crops and ornamental plants, is expected to result in the induction of novel mutations. This study investigates the morphological and biochemical responses of Oryza sativa toward different doses of carbon ion beam irradiation. METHODS: In this study, the dry seeds of O. sativa were irradiated at 0, 20, 40, 60, 80, 100, and 120 Gy, followed by in-vitro germination under controlled conditions. Morphological and biochemical studies were conducted to investigate the morphological and physiological responses of O. sativa towards ion beam irradiation. RESULTS: The study demonstrated that low doses (10 Gy) of ion beam have a stimulating effect on the height, root length, and fresh weight of the plantlets but not on the number of leaves. Meanwhile, doses higher than 10 Gy caused reductions in all the morphological parameters studied as compared to the control samples. The highest total soluble protein content [(2.11 ± 0.47) mg/g FW] was observed in plantlets irradiated at 20 Gy. All irradiated plantlets were found to have 0.85% to 58.32% higher specific activity of peroxidase as compared to the control samples. The present study also revealed that low doses of ion beam (10 and 20 Gy) had negligible effect on the total chlorophyll content of O. sativa plantlets while 40 Gy had a stimulating effect on the chlorophyll content. Plantlets irradiated between 40 to 120 Gy were shown to be 0.38% to 9.98% higher in total soluble nitrogen content which, however, was not significantly different from the control samples. CONCLUSIONS: Carbon ion beam irradiation administered at low to moderate doses of 10 to 40 Gy may induce O. sativa mutants with superior characteristics.
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Claims 9
Claim · model-written summary
Low dose (10 Gy) ion beam stimulated the height, root length and fresh weight of rice plantlets.
- Taxon
- Oryza sativa
Oryza sativat0 - Material
- MR219t0
- Organ / stage
- plantletse0
- Treatment
- low doses (10 Gy) of ion beame0
- Outcome
- height, root length, and fresh weighte0
- Direction
- stimulating effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Oryza sativa L. (cultivar MR219)”
e0“low doses (10 Gy) of ion beam have a stimulating effect on the height, root length, and fresh weight of the plantlets”
Claim · model-written summary
Low dose (10 Gy) ion beam had no effect on the number of leaves.
- Taxon
- Oryza sativaOryza sativat0
- Material
- MR219t0
- Treatment
- low doses (10 Gy) of ion beame0
- Outcome
- number of leavese1
- Direction
- no_changeinferrede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Oryza sativa L. (cultivar MR219)”
e0“low doses (10 Gy) of ion beam have a stimulating effect on the height, root length, and fresh weight of the plantlets”
e1“but not on the number of leaves”
Claim · model-written summary
Doses higher than 10 Gy reduced all the morphological parameters studied compared with control samples.
- Taxon
- Oryza sativaOryza sativat0
- Material
- MR219t0
- Treatment
- doses higher than 10 Gye2
- Outcome
- all the morphological parameters studiede2
- Direction
- reductionse2
- Comparator
- control samplese2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Oryza sativa L. (cultivar MR219)”
e2“doses higher than 10 Gy caused reductions in all the morphological parameters studied as compared to the control samples”
Claim · model-written summary
The highest total soluble protein content was observed in plantlets irradiated at 20 Gy.
- Taxon
- Oryza sativaOryza sativat0
- Material
- MR219t0
- Organ / stage
- plantletse3
- Treatment
- 20 Gye3
- Outcome
- total soluble protein contente3
- Direction
- higheste3
- Value
- (2.11 ± 0.47) mg/g FWe3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Oryza sativa L. (cultivar MR219)”
e3“The highest total soluble protein content [(2.11 ± 0.47) mg/g FW] was observed in plantlets irradiated at 20 Gy”
Claim · model-written summary
Irradiated rice plantlets had 0.85% to 58.32% higher specific activity of peroxidase than control samples.
- Taxon
- Oryza sativaOryza sativat0
- Material
- MR219t0
- Organ / stage
- plantletse4
- Treatment
- irradiatede4
- Outcome
- specific activity of peroxidasee4
- Direction
- highere4
- Value
- 0.85% to 58.32%e4
- Comparator
- control samplese4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Oryza sativa L. (cultivar MR219)”
e4“All irradiated plantlets were found to have 0.85% to 58.32% higher specific activity of peroxidase as compared to the control samples”
Claim · model-written summary
Low doses (10 and 20 Gy) of ion beam had negligible effect on total chlorophyll content.
- Taxon
- Oryza sativaOryza sativat0
- Material
- MR219t0
- Treatment
- low doses of ion beam (10 and 20 Gy)e5
- Outcome
- total chlorophyll contente5
- Direction
- negligible effecte5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Oryza sativa L. (cultivar MR219)”
e5“low doses of ion beam (10 and 20 Gy) had negligible effect on the total chlorophyll content of O. sativa plantlets”
Claim · model-written summary
40 Gy ion beam had a stimulating effect on chlorophyll content.
- Taxon
- Oryza sativaOryza sativat0
- Material
- MR219t0
- Treatment
- 40 Gye6
- Outcome
- chlorophyll contente6
- Direction
- stimulating effecte6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Oryza sativa L. (cultivar MR219)”
e6“40 Gy had a stimulating effect on the chlorophyll content”
Claim · model-written summary
Plantlets irradiated at 40 to 120 Gy had 0.38% to 9.98% higher total soluble nitrogen content, not significantly different from controls.
- Taxon
- Oryza sativaOryza sativat0
- Material
- MR219t0
- Treatment
- between 40 to 120 Gye7
- Outcome
- total soluble nitrogen contente7
- Direction
- highere7
- Value
- 0.38% to 9.98%e7
- Comparator
- control samplese7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Oryza sativa L. (cultivar MR219)”
e7“Plantlets irradiated between 40 to 120 Gy were shown to be 0.38% to 9.98% higher in total soluble nitrogen content which, however, was not significantly different from the control samples”
Claim · model-written summary
Carbon ion beam at low to moderate doses of 10 to 40 Gy may induce rice mutants with superior characteristics.
- Taxon
- O. sativaOryza sativae1
- Treatment
- low to moderate doses of 10 to 40 Gye1
- Outcome
- mutants with superior characteristicse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Carbon ion beam irradiation administered at low to moderate doses of 10 to 40 Gy may induce O. sativa mutants with superior characteristics”
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