Abstract
Abstract The threats of arsenic (As) contamination of rice grains and rice-based food products are being experienced globally. Arsenic toxicity to rice ( Oryza sativa L. ) affects its production and grain quality. In this work, screening of 67 rice genotypes was performed against As stress (25 µM and 50 µM, in the form of arsenite [As(III)]) for 7d in lab conditions on the basis of germination and early growth of seedlings. Germination percentage, root and shoot length, and seedling vigour were analyzed. The genotypes showed a wide range of variation in germination percentage, and seedling growth in response to both control and As(III) stress. The comparative evaluation of genotypes could demarcate them into sensitive (e.g. Shobhini and DRR Dhan-41) and tolerant (e.g. Pooja and Vivek Dhan) categories. To further investigate the behavior of contrasting varieties, a tolerant (Pooja) and moderately sensitive (CO-50) variety of rice were subjected to As stress for variable concentrations (0–25 µM; fixed duration 5 d) and duration (1–15 d; fixed concentration 25 µM). The accumulation of As by tolerant and sensitive varieties in roots, old leaves and young leaves was found to be significantly lower in Pooja than in CO-50. The differential As accumulation reflected in growth and biochemical responses (malondialdehyde level, superoxide dismutase activity and total non-protein thiols). The results demonstrate the potential of using contrasting rice varieties for future breeding or gene editing approaches to develop low arsenic accumulating rice cultivars.
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Claims 5
Claim · model-written summary
Rice genotypes varied widely in germination percentage and seedling growth under control and As(III) stress.
- Taxon
- rice
Oryza sativat0 - Treatment
- As(III) stresse1
- Outcome
- germination percentage, and seedling growthe1
- Comparator
- controle1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Evaluation of the responses of contrasting sensitive and tolerant rice genotypes to arsenic stress”
e1“The genotypes showed a wide range of variation in germination percentage, and seedling growth in response to both control and As(III) stress”
Claim · model-written summary
Rice genotypes could be classed as sensitive (Shobhini, DRR Dhan-41) or tolerant (Pooja, Vivek Dhan) in the screen.
- Taxon
- riceOryza sativat0
- Material
- Shobhini and DRR Dhan-41e5
- Outcome
- demarcate them into sensitive (e.g. Shobhini and DRR Dhan-41) and tolerant (e.g. Pooja and Vivek Dhan) categoriese5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Evaluation of the responses of contrasting sensitive and tolerant rice genotypes to arsenic stress”
e5“The comparative evaluation of genotypes could demarcate them into sensitive (e.g. Shobhini and DRR Dhan-41) and tolerant (e.g. Pooja and Vivek Dhan) categories”
Claim · model-written summary
Arsenic accumulation was significantly lower in Pooja than in CO-50 in roots, old leaves and young leaves under arsenic stress.
- Taxon
- riceOryza sativat0
- Material
- Poojae3
- Organ / stage
- roots, old leaves and young leavese3
- Treatment
- As stresse2
- Outcome
- accumulation of Ase3
- Direction
- significantly lowere3
- Comparator
- CO-50e3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Evaluation of the responses of contrasting sensitive and tolerant rice genotypes to arsenic stress”
e2“were subjected to As stress”
e3“The accumulation of As by tolerant and sensitive varieties in roots, old leaves and young leaves was found to be significantly lower in Pooja than in CO-50”
Claim · model-written summary
The differential arsenic accumulation was reflected in growth and biochemical responses of rice.
- Taxon
- riceOryza sativat0
- Treatment
- differential As accumulatione4
- Outcome
- growth and biochemical responsese4
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Evaluation of the responses of contrasting sensitive and tolerant rice genotypes to arsenic stress”
e4“The differential As accumulation reflected in growth and biochemical responses (malondialdehyde level, superoxide dismutase activity and total non-protein thiols)”
Claim · model-written summary
Contrasting rice varieties could be used in breeding or gene editing to develop low arsenic accumulating rice cultivars.
- Taxon
- riceOryza sativat0
- Outcome
- develop low arsenic accumulating rice cultivarse6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Evaluation of the responses of contrasting sensitive and tolerant rice genotypes to arsenic stress”
e6“The results demonstrate the potential of using contrasting rice varieties for future breeding or gene editing approaches to develop low arsenic accumulating rice cultivars”
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