Abstract
Aluminum (Al) is the third most abundant metal in earth crust, whose chemical form is mainly dependent on soil pH. The most toxic form of Al with respect to plants is Al3+, which exists in soil pH <5. Acidic soil significantly limits crop production mainly due to Al3+ toxicity worldwide, impacting approximately 50% of the world's arable land (in North-Eastern India 80% soil are acidic). Al3+ toxicity in plants ensues root growth inhibition leading to less nutrient and water uptake impacting crop productivity as a whole. Rice is one of the chief grains which constitutes the staple food of two-third of the world population including India and is not untouched by Al3+ toxicity. Al contamination is a critical constraint to plant production in agricultural soils of North East India. 24 indigenous Indica rice varieties (including Badshahbhog as tolerant check and Mashuri as sensitive check) were screened for Al stress tolerance in hydroponic plant growth system. Results show marked difference in growth parameters (relative growth rate, Root tolerance index, fresh and dry weight of root) of rice seedlings due to Al (100 μM) toxicity. Al3+ uptake and lipid peroxidation level also increased concomitantly under Al treatment. Histochemical assay were also performed to elucidate uptake of aluminum, loss of membrane integrity and lipid peroxidation, which were found to be more in sensitive genotypes at higher Al concentration. This study revealed that aluminum toxicity is a serious harmful problem for rice crop productivity in acid soil. Based on various parameters studied it's concluded that Disang is a comparatively tolerant variety whereas Joymati a sensitive variety. Western blot hybridization further strengthened the claim, as it demonstrated more accumulation of Glutathione reductase (GR) protein in Disang rice variety than Joymati under stressed condition. This study also observed that the emergence of lethal toxic symptoms occurs only after 48h irrespective of the dose used in the study.
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Claims 6
Claim · model-written summary
Growth parameters of rice seedlings differed markedly under Al toxicity.
- Taxon
- rice
Oryza sativae2 - Treatment
- Al (100 μM) toxicitye2
- Outcome
- growth parameterse2
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Results show marked difference in growth parameters (relative growth rate, Root tolerance index, fresh and dry weight of root) of rice seedlings due to Al (100 μM) toxicity”
Claim · model-written summary
Al3+ uptake and lipid peroxidation increased under Al treatment.
- Taxon
- riceOryza sativae2
- Treatment
- Al treatmente3
- Outcome
- Al3+ uptake and lipid peroxidation levele3
- Direction
- increasede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Results show marked difference in growth parameters (relative growth rate, Root tolerance index, fresh and dry weight of root) of rice seedlings due to Al (100 μM) toxicity”
e3“Al3+ uptake and lipid peroxidation level also increased concomitantly under Al treatment”
Claim · model-written summary
Sensitive genotypes showed more aluminum uptake, membrane damage and lipid peroxidation at higher Al concentration.
- Taxon
- riceOryza sativae2
- Material
- sensitive genotypese4
- Treatment
- higher Al concentratione4
- Outcome
- uptake of aluminum, loss of membrane integrity and lipid peroxidatione4
- Direction
- moree4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Results show marked difference in growth parameters (relative growth rate, Root tolerance index, fresh and dry weight of root) of rice seedlings due to Al (100 μM) toxicity”
e4“Histochemical assay were also performed to elucidate uptake of aluminum, loss of membrane integrity and lipid peroxidation, which were found to be more in sensitive genotypes at higher Al concentration”
Claim · model-written summary
Disang is a comparatively tolerant rice variety and Joymati a sensitive one.
- Taxon
- riceOryza sativae2
- Material
- Disange5
- Outcome
- comparatively tolerant varietye5
- Comparator
- Joymatie5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Results show marked difference in growth parameters (relative growth rate, Root tolerance index, fresh and dry weight of root) of rice seedlings due to Al (100 μM) toxicity”
e5“Based on various parameters studied it's concluded that Disang is a comparatively tolerant variety whereas Joymati a sensitive variety”
Claim · model-written summary
Disang showed more accumulation of Glutathione reductase (GR) protein than Joymati under stress.
- Taxon
- riceOryza sativae6
- Material
- Disange6
- Treatment
- stressed conditione6
- Gene
- Glutathione reductase (GR) proteine6
- Outcome
- accumulation of Glutathione reductase (GR) proteine6
- Direction
- moree6
- Comparator
- Joymatie6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“Western blot hybridization further strengthened the claim, as it demonstrated more accumulation of Glutathione reductase (GR) protein in Disang rice variety than Joymati under stressed condition”
Claim · model-written summary
Lethal toxic symptoms emerged only after 48 h irrespective of the Al dose.
- Taxon
- riceOryza sativae2
- Outcome
- emergence of lethal toxic symptomse7
- Value
- 48he7
- Qualifier
- irrespective of the dose used in the studye7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Results show marked difference in growth parameters (relative growth rate, Root tolerance index, fresh and dry weight of root) of rice seedlings due to Al (100 μM) toxicity”
e7“This study also observed that the emergence of lethal toxic symptoms occurs only after 48h irrespective of the dose used in the study”
The same questions in other papers
aluminium atom · physiology: oxidative · Oryza sativa (rice)Positive and negative results
7 papers in the same direction as this paper · 1 in the opposite direction
- negative
- positive
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See all 9 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.