Abstract
For study of underlying physiological mechanisms for genotypic differences in tolerance to Zn and Fe deficiency and hypoxia, two contrasting rice genotypes (Oryza sativa L. cv. Amol and Dashti) were studied in nutrient solution with or without aeration. Growth of the lowland genotype (Amol) was significantly improved in nutrient solution without aeration, the opposite was observed for upland genotype (Dashti). Tolerance of Amol to low Zn was higher than Dashti, in contrast the former genotype was more susceptible to Fe deficiency. Photo- chemistry of leaves was affected strongly by Fe but not Zn deficiency. Low supply of Zn and Fe impaired photosynthetic capacity of plants mainly via stomatal limitation and the amount of reduction in net assimilation rate correlated well with differential growth reduction under Zn and Fe deficiency stress. Under hypoxia, plants had lower stomatal conductance and transpiration rate leading to improved photosynthetic water use efficiency. Activity of ascorbate peroxidase (APX) and guaiacol peroxidase (POD) induced by low Zn supply, but low Fe caused reduction of APX, CAT and POD. Activity of SOD decreased in low Zn plants, but increased in plants suffered from Fe deficiency. Increased APX activity in response to hypoxic conditions in Amol was as- sociated with higher tolerance in this genotype, in contrast POD activity only monitored stress conditions without any protecting role. A close correlation was observed between accumulation of O2 .- and differential sensitivity of genotypes to hypoxia. Acta Biol Szeged 52(2):283-294 (2008)
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 16
Claim · model-written summary
Amol growth was significantly improved in nutrient solution without aeration.
- Taxon
- Oryza sativa L.
Oryza sativae0 - Material
- Amole1
- Treatment
- nutrient solution without aeratione1
- Outcome
- Growthe1
- Direction
- improvede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“two contrasting rice genotypes (Oryza sativa L. cv. Amol and Dashti)”
e1“Growth of the lowland genotype (Amol) was significantly improved in nutrient solution without aeration, the opposite was observed for upland genotype (Dashti)”
Claim · model-written summary
Dashti growth decreased in nutrient solution without aeration, the opposite of the lowland genotype.
- Taxon
- Oryza sativa L.Oryza sativae0
- Material
- Dashtie1
- Treatment
- nutrient solution without aeratione1
- Outcome
- Growthe1
- Direction
- decreaseinferrede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“two contrasting rice genotypes (Oryza sativa L. cv. Amol and Dashti)”
e1“Growth of the lowland genotype (Amol) was significantly improved in nutrient solution without aeration, the opposite was observed for upland genotype (Dashti)”
Claim · model-written summary
Tolerance of Amol to low Zn was higher than that of Dashti.
- Taxon
- Oryza sativa L.Oryza sativae0
- Material
- Amole2
- Treatment
- low Zne2
- Outcome
- Tolerancee2
- Direction
- highere2
- Comparator
- Dashtie2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“two contrasting rice genotypes (Oryza sativa L. cv. Amol and Dashti)”
e2“Tolerance of Amol to low Zn was higher than Dashti”
Claim · model-written summary
Amol was more susceptible to Fe deficiency than Dashti.
- Taxon
- Oryza sativa L.Oryza sativae0
- Treatment
- Fe deficiencye3
- Outcome
- susceptible to Fe deficiencye3
- Direction
- moree3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“two contrasting rice genotypes (Oryza sativa L. cv. Amol and Dashti)”
e3“in contrast the former genotype was more susceptible to Fe deficiency”
Claim · model-written summary
Fe deficiency strongly affected leaf photochemistry, whereas Zn deficiency did not.
- Taxon
- Oryza sativa L.Oryza sativae0
- Treatment
- Fee4
- Outcome
- Photo- chemistry of leavese4
- Comparator
- Zn deficiencye4
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“two contrasting rice genotypes (Oryza sativa L. cv. Amol and Dashti)”
e4“Photo- chemistry of leaves was affected strongly by Fe but not Zn deficiency”
Claim · model-written summary
Low Zn and Fe supply impaired photosynthetic capacity mainly via stomatal limitation.
- Taxon
- Oryza sativa L.Oryza sativae0
- Treatment
- Low supply of Zn and Fee5
- Outcome
- photosynthetic capacitye5
- Direction
- impairede5
- Qualifier
- mainly via stomatal limitatione5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“two contrasting rice genotypes (Oryza sativa L. cv. Amol and Dashti)”
e5“Low supply of Zn and Fe impaired photosynthetic capacity of plants mainly via stomatal limitation”
Claim · model-written summary
Reduction in net assimilation rate correlated well with differential growth reduction under Zn and Fe deficiency stress.
- Taxon
- Oryza sativa L.Oryza sativae0
- Treatment
- Zn and Fe deficiency stresse6
- Outcome
- differential growth reductione6
- Qualifier
- amount of reduction in net assimilation ratee6
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“two contrasting rice genotypes (Oryza sativa L. cv. Amol and Dashti)”
e6“the amount of reduction in net assimilation rate correlated well with differential growth reduction under Zn and Fe deficiency stress”
Claim · model-written summary
Under hypoxia, plants had lower stomatal conductance and transpiration rate.
- Taxon
- Oryza sativa L.Oryza sativae0
- Treatment
- hypoxiae7
- Outcome
- stomatal conductance and transpiration ratee7
- Direction
- lowere7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“two contrasting rice genotypes (Oryza sativa L. cv. Amol and Dashti)”
e7“Under hypoxia, plants had lower stomatal conductance and transpiration rate leading to improved photosynthetic water use efficiency”
Claim · model-written summary
Under hypoxia, photosynthetic water use efficiency was improved.
- Taxon
- Oryza sativa L.Oryza sativae0
- Treatment
- hypoxiae7
- Outcome
- photosynthetic water use efficiencye7
- Direction
- improvede7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“two contrasting rice genotypes (Oryza sativa L. cv. Amol and Dashti)”
e7“Under hypoxia, plants had lower stomatal conductance and transpiration rate leading to improved photosynthetic water use efficiency”
Claim · model-written summary
Low Zn supply induced ascorbate peroxidase (APX) and guaiacol peroxidase (POD) activity.
- Taxon
- Oryza sativa L.Oryza sativae0
- Treatment
- low Zn supplye1
- Gene
- ascorbate peroxidase (APX)e1
- Outcome
- Activity of ascorbate peroxidase (APX) and guaiacol peroxidase (POD)e1
- Direction
- inducede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“two contrasting rice genotypes (Oryza sativa L. cv. Amol and Dashti)”
e1“Activity of ascorbate peroxidase (APX) and guaiacol peroxidase (POD) induced by low Zn supply”
Claim · model-written summary
Low Fe caused reduction of APX, CAT and POD activity.
- Taxon
- Oryza sativa L.Oryza sativae0
- Treatment
- low Fee2
- Outcome
- APX, CAT and PODe2
- Direction
- reductione2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“two contrasting rice genotypes (Oryza sativa L. cv. Amol and Dashti)”
e2“but low Fe caused reduction of APX, CAT and POD”
Claim · model-written summary
Low Zn decreased superoxide dismutase (SOD) activity.
- Taxon
- Oryza sativa L.Oryza sativae0
- Treatment
- low Zne3
- Gene
- SODe3
- Outcome
- Activity of SODe3
- Direction
- decreasede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“two contrasting rice genotypes (Oryza sativa L. cv. Amol and Dashti)”
e3“Activity of SOD decreased in low Zn plants”
Claim · model-written summary
Fe deficiency increased superoxide dismutase (SOD) activity.
- Taxon
- Oryza sativa L.Oryza sativae0
- Treatment
- Fe deficiencye4
- Gene
- SODe4
- Outcome
- Activity of SODe4
- Direction
- increasede4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“two contrasting rice genotypes (Oryza sativa L. cv. Amol and Dashti)”
e4“Activity of SOD decreased in low Zn plants, but increased in plants suffered from Fe deficiency”
Claim · model-written summary
Increased APX activity under hypoxia in Amol was associated with higher tolerance.
- Taxon
- Oryza sativa L.Oryza sativae0
- Material
- Amole5
- Treatment
- hypoxic conditionse5
- Gene
- APXe5
- Outcome
- APX activitye5
- Direction
- Increasede5
- Qualifier
- higher tolerancee5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“two contrasting rice genotypes (Oryza sativa L. cv. Amol and Dashti)”
e5“Increased APX activity in response to hypoxic conditions in Amol was as- sociated with higher tolerance in this genotype”
Claim · model-written summary
POD activity only monitored stress conditions and had no protecting role.
- Taxon
- Oryza sativa L.Oryza sativae0
- Gene
- PODe6
- Outcome
- protecting rolee6
- Qualifier
- POD activity only monitored stress conditions without any protecting rolee6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“two contrasting rice genotypes (Oryza sativa L. cv. Amol and Dashti)”
e6“in contrast POD activity only monitored stress conditions without any protecting role”
Claim · model-written summary
A close correlation was observed between superoxide (O2 .-) accumulation and differential sensitivity of genotypes to hypoxia.
- Taxon
- Oryza sativa L.Oryza sativae0
- Treatment
- hypoxiae7
- Compound
- O2 .-e7
- Outcome
- differential sensitivity of genotypese7
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“two contrasting rice genotypes (Oryza sativa L. cv. Amol and Dashti)”
e7“A close correlation was observed between accumulation of O2 .- and differential sensitivity of genotypes to hypoxia”
The same questions in other papers
iron atom · physiology: photosynthesis · Oryza sativa (rice)Positive and negative results
2 papers in the same direction as this paper · 5 in the opposite direction
- positive
- positive
- positive
4 papers more in this group
See all 8 papers →zinc atom · physiology: photosynthesis · Oryza sativa (rice)Positive and negative results
1 paper in the same direction as this paper · 12 in the opposite direction
- positive
- positive
- positive
10 papers more in this group
See all 14 papers →flooding · physiology: photosynthesis · Oryza sativa (rice)Positive and negative results
7 papers in the same direction as this paper · 18 in the opposite direction
- negative
- negative
- negative
22 papers more in this group
See all 26 papers →fertilization · growth · Oryza sativa (rice)Positive and negative results
669 papers in the same direction as this paper · 81 in the opposite direction · 8 reporting no difference from an alternative
- negative
- negative
- negative
755 papers more in this group
See all 759 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.