Abstract
Phosphorus (P) deficiency is a major constraint to rice productivity worldwide. Exogenous application of abscisic acid (ABA) has not been reported to improve rice response toward P-deficiency. Present study analyzed the biochemical response in the shoots and roots of two rice cultivars, CSR10 (low-P tolerant) and Pusa44 (low-P susceptible) at 36, 72 and 216 h after normal P (NP) (10 ppm) (control), low P (LP) (1 ppm), and LP + ABA given to 12-d old seedlings. Results found that biomass and P-uptake reduced in Pusa44 compared to CSR10 under LP but improved significantly under LP + ABA. P-fractionation was utilized efficiently by CSR10 under LP while LP + ABA improved P-fractionation in both cultivars. LP + ABA improved acid phosphatases in both cultivars. Hexose and sucrose levels were depleted while starch hydrolyzed poorly in Pusa44 compared to CSR10 under LP while LP + ABA enhanced starch hydrolysis and levels of sugars in both cultivars. Starch increased at a late stage in the roots of CSR10 under LP while Pusa44 improved it under LP + ABA. Antioxidant capacity was low while H2O2 was high at early stage in Pusa44 compared to CSR10 under LP. LP + ABA improved antioxidant capacity and reduced H2O2 in both cultivars. Results concluded that ABA is a versatile regulator of not only P-acquisition/P-utilization but also carbohydrates and antioxidant activities under P-deficiency, and exogenous ABA improved low-P tolerance in rice.
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Claims 16
Claim · model-written summary
Under low phosphorus, Pusa44 had lower biomass than CSR10.
- Taxon
- rice
Oryza sativat0 - Material
- Pusa44e0
- Treatment
- LPe0
- Outcome
- biomasse0
- Direction
- reducede0
- Comparator
- CSR10e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“biomass and P-uptake reduced in Pusa44 compared to CSR10 under LP”
t0“rice ( Oryza sativa L.)”
Claim · model-written summary
Under low phosphorus, Pusa44 had lower phosphorus uptake than CSR10.
- Taxon
- riceOryza sativat0
- Material
- Pusa44e0
- Treatment
- LPe0
- Outcome
- P-uptakee0
- Direction
- reducede0
- Comparator
- CSR10e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“biomass and P-uptake reduced in Pusa44 compared to CSR10 under LP”
t0“rice ( Oryza sativa L.)”
Claim · model-written summary
ABA under low phosphorus significantly improved biomass and phosphorus uptake in Pusa44.
- Taxon
- riceOryza sativat0
- Material
- Pusa44e0
- Treatment
- LP + ABAe0
- Outcome
- biomass and P-uptakee0
- Direction
- improvede0
- Comparator
- LPe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“biomass and P-uptake reduced in Pusa44 compared to CSR10 under LP but improved significantly under LP + ABA”
t0“rice ( Oryza sativa L.)”
Claim · model-written summary
CSR10 efficiently used phosphorus fractionation under low phosphorus.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“P-fractionation was utilized efficiently by CSR10 under LP”
t0“rice ( Oryza sativa L.)”
Claim · model-written summary
ABA under low phosphorus improved phosphorus fractionation in both cultivars.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“LP + ABA improved P-fractionation in both cultivars”
t0“rice ( Oryza sativa L.)”
Claim · model-written summary
ABA under low phosphorus improved acid phosphatases in both cultivars.
- Taxon
- riceOryza sativat0
- Treatment
- LP + ABAe0
- Gene
- acid phosphatasese0
- Outcome
- acid phosphatasese0
- Direction
- improvede0
- Comparator
- LPe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“LP + ABA improved acid phosphatases in both cultivars”
t0“rice ( Oryza sativa L.)”
Claim · model-written summary
Pusa44 had lower hexose and sucrose levels than CSR10 under low phosphorus.
- Taxon
- riceOryza sativat0
- Material
- Pusa44e0
- Treatment
- LPe0
- Outcome
- Hexose and sucrose levelse0
- Direction
- depletede0
- Comparator
- CSR10e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Hexose and sucrose levels were depleted while starch hydrolyzed poorly in Pusa44 compared to CSR10 under LP”
t0“rice ( Oryza sativa L.)”
Claim · model-written summary
Pusa44 hydrolyzed starch poorly compared with CSR10 under low phosphorus.
- Taxon
- riceOryza sativat0
- Material
- Pusa44e0
- Treatment
- LPe0
- Outcome
- starch hydrolyzede0
- Direction
- poorlye0
- Comparator
- CSR10e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“starch hydrolyzed poorly in Pusa44 compared to CSR10 under LP”
t0“rice ( Oryza sativa L.)”
Claim · model-written summary
ABA under low phosphorus enhanced starch hydrolysis and sugar levels in both cultivars.
- Taxon
- riceOryza sativat0
- Treatment
- LP + ABAe0
- Outcome
- starch hydrolysis and levels of sugarse0
- Direction
- enhancede0
- Comparator
- LPe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“LP + ABA enhanced starch hydrolysis and levels of sugars in both cultivars”
t0“rice ( Oryza sativa L.)”
Claim · model-written summary
Root starch increased late in CSR10 under low phosphorus.
- Taxon
- riceOryza sativat0
- Material
- CSR10e0
- Organ / stage
- rootse0
- Treatment
- LPe0
- Outcome
- Starche0
- Direction
- increasede0
- Qualifier
- at a late stagee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Starch increased at a late stage in the roots of CSR10 under LP”
t0“rice ( Oryza sativa L.)”
Claim · model-written summary
ABA under low phosphorus improved root starch in Pusa44.
- Taxon
- riceOryza sativat0
- Material
- Pusa44e0
- Treatment
- LP + ABAe0
- Outcome
- Pusa44 improved ite0
- Direction
- improvede0
- Comparator
- LPe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Pusa44 improved it under LP + ABA”
t0“rice ( Oryza sativa L.)”
Claim · model-written summary
Early antioxidant capacity was lower in Pusa44 than CSR10 under low phosphorus.
- Taxon
- riceOryza sativat0
- Material
- Pusa44e0
- Treatment
- LPe0
- Outcome
- Antioxidant capacitye0
- Direction
- lowe0
- Qualifier
- at early stagee0
- Comparator
- CSR10e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Antioxidant capacity was low while H2O2 was high at early stage in Pusa44 compared to CSR10 under LP”
t0“rice ( Oryza sativa L.)”
Claim · model-written summary
Early hydrogen peroxide was higher in Pusa44 than CSR10 under low phosphorus.
- Taxon
- riceOryza sativat0
- Material
- Pusa44e0
- Treatment
- LPe0
- Outcome
- H2O2e0
- Direction
- highe0
- Qualifier
- at early stagee0
- Comparator
- CSR10e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“H2O2 was high at early stage in Pusa44 compared to CSR10 under LP”
t0“rice ( Oryza sativa L.)”
Claim · model-written summary
ABA under low phosphorus improved antioxidant capacity in both cultivars.
- Taxon
- riceOryza sativat0
- Treatment
- LP + ABAe0
- Outcome
- antioxidant capacitye0
- Direction
- improvede0
- Comparator
- LPe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“LP + ABA improved antioxidant capacity and reduced H2O2 in both cultivars”
t0“rice ( Oryza sativa L.)”
Claim · model-written summary
ABA under low phosphorus reduced hydrogen peroxide in both cultivars.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“LP + ABA improved antioxidant capacity and reduced H2O2 in both cultivars”
t0“rice ( Oryza sativa L.)”
Claim · model-written summary
Exogenous ABA improved rice tolerance to low phosphorus.
- Taxon
- riceOryza sativat0
- Treatment
- exogenous ABAe0
- Outcome
- low-P tolerancee0
- Direction
- improvede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“exogenous ABA improved low-P tolerance in rice”
t0“rice ( Oryza sativa L.)”
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See all 11 papers →8 of 9 groups shown: named compounds and organisms first, then groups whose results differ (checked claim by claim), then those with positive and negative results, then the smaller groups.
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.