Abstract
ABSTRACT Three rice (Oryza sativa L.) varieties viz. ‘CR 683‘, ‘Budumoni’ “Budumoni”, and ‘Akisali’ were grown in sand culture in a greenhouse with three levels of iron (Fe) in nutrient solutions viz., 0.045 (control), 5.34, and 7.12 mM Fe to study the effects of iron on physiology of rice seedling growth. Shoot length, root, and shoot dry weights were reduced significantly by higher levels of Fe in the medium. Results of leaf bronzing have revealed higher bronzing score in the seedlings grown at 7.12 mM Fe in the growth medium. Occurrence of bronzing was severe in varieties ‘CR683’ and ‘Akisali’. Variety ‘Budumoni'maintained higher leaf chlorophyll content, nitrate reductase activity and total soluble protein in the leaves at 5.34 and 7.12 mM Fe. Higher concentration of iron in the nutrient medium exerted an inhibiting effect on the concentration and content of almost all the macro and micronutrients in the root and shoot. Higher Fe and nitrogen (N) contents and lower phosphorus (P), potassium (K), manganese (Mn), copper (Cu), and zinc (Zn) were determined in roots and shoots in plants grown in medium supplied with 7.12 mM Fe. The variety ‘Budumoni’ “Budumoni” performed relatively better in comparison to other tested varieties at 7.12 mM Fe in the growth medium. ‘Budumoni’ “Budumoni” can be considered a suitable rice variety to use in the rice-breeding programme for Fe toxicity tolerance in acid soils of Assam.
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Claims 7
Claim · model-written summary
Higher iron levels in the medium reduced rice shoot length, root and shoot dry weights.
- Taxon
- rice
Oryza sativae0 - Treatment
- higher levels of Fe in the mediume3
- Outcome
- Shoot length, root, and shoot dry weightse3
- Direction
- reducede3
- Comparator
- 0.045 (control)e2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Three rice (Oryza sativa L.) varieties”
e2“0.045 (control), 5.34, and 7.12 mM Fe”
e3“Shoot length, root, and shoot dry weights were reduced significantly by higher levels of Fe in the medium”
Claim · model-written summary
Seedlings at 7.12 mM Fe had higher leaf bronzing scores.
- Taxon
- riceOryza sativae0
- Treatment
- 7.12 mM Fee4
- Outcome
- bronzing scoree4
- Direction
- highere4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Three rice (Oryza sativa L.) varieties”
e4“Results of leaf bronzing have revealed higher bronzing score in the seedlings grown at 7.12 mM Fe in the growth medium”
Claim · model-written summary
Bronzing was severe in the CR683 variety.
- Taxon
- riceOryza sativae0
- Material
- CR683e5
- Outcome
- Occurrence of bronzinge5
- Qualifier
- severee5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Three rice (Oryza sativa L.) varieties”
e5“Occurrence of bronzing was severe in varieties ‘CR683’ and ‘Akisali’”
Claim · model-written summary
Higher iron concentration in the medium inhibited the concentration and content of almost all macro and micronutrients in roots and shoots.
- Taxon
- riceOryza sativae0
- Organ / stage
- root and shoote7
- Treatment
- Higher concentration of iron in the nutrient mediume7
- Outcome
- concentration and content of almost all the macro and micronutrientse7
- Direction
- inhibitinge7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Three rice (Oryza sativa L.) varieties”
e7“Higher concentration of iron in the nutrient medium exerted an inhibiting effect on the concentration and content of almost all the macro and micronutrients in the root and shoot”
Claim · model-written summary
At 7.12 mM Fe, rice roots and shoots had higher Fe and nitrogen contents.
- Taxon
- riceOryza sativae0
- Organ / stage
- roots and shootse7
- Treatment
- 7.12 mM Fee7
- Outcome
- Fe and nitrogen (N) contentse6
- Direction
- Highere6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Three rice (Oryza sativa L.) varieties”
e6“Higher Fe and nitrogen (N) contents”
e7“lower phosphorus (P), potassium (K), manganese (Mn), copper (Cu), and zinc (Zn) were determined in roots and shoots in plants grown in medium supplied with 7.12 mM Fe”
Claim · model-written summary
At 7.12 mM Fe, rice roots and shoots had lower phosphorus, potassium and manganese.
- Taxon
- riceOryza sativae0
- Organ / stage
- roots and shootse7
- Treatment
- 7.12 mM Fee7
- Outcome
- phosphorus (P), potassium (K), manganese (Mn)e7
- Direction
- lowere7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Three rice (Oryza sativa L.) varieties”
e7“lower phosphorus (P), potassium (K), manganese (Mn), copper (Cu), and zinc (Zn) were determined in roots and shoots in plants grown in medium supplied with 7.12 mM Fe”
Claim · model-written summary
At 7.12 mM Fe, rice roots and shoots had lower copper and zinc.
- Taxon
- riceOryza sativae0
- Organ / stage
- roots and shootse7
- Treatment
- 7.12 mM Fee7
- Outcome
- copper (Cu), and zinc (Zn)e7
- Direction
- lowere7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Three rice (Oryza sativa L.) varieties”
e7“lower phosphorus (P), potassium (K), manganese (Mn), copper (Cu), and zinc (Zn) were determined in roots and shoots in plants grown in medium supplied with 7.12 mM Fe”
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