Abstract
The effects of 60-d cadmium (Cd) exposure on enzymatic and non-enzymatic antioxidative system of Oryza sativa L. seedlings at tillering stage were studied using soil culture experiment. Research findings showed that chlorophyll content of Oryza sativa L. declined with the increase in soil metal concentration. Cd pollution induced the antioxidant stress by inducing O2(-1) and H2O2, which increased in plants; at the same time, MDA as the final product of peroxidation of membrane lipids, accumulated in plant. The antioxidant enzyme system was initiated under the Cd exposure, i.e. almost all the activities of superoxide dismutase (SOD), peroxidase, catalase, glutathione peroxidase, and ascorbate peroxidase were elevated both in leaves and roots. The non-protein thiols including phytochelatins and glutathione to scavenge toxic free radicals caused by Cd stress was also studied. The contents of phytochelatins and glutathione were about 3.12-6.65-fold and 3.27-10.73-fold in leaves, against control; and the corresponding values were about 3.53-9.37-fold and 1.41-5.11-fold in roots, accordingly.
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Claims 9
Claim · model-written summary
Rice chlorophyll declined as soil cadmium concentration increased.
- Taxon
- Oryza sativa L.
Oryza sativae0 - Treatment
- cadmium (Cd) exposuree1
- Outcome
- chlorophyll contente0
- Direction
- declinede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“chlorophyll content of Oryza sativa L. declined with the increase in soil metal concentration”
e1“cadmium (Cd) exposure”
Claim · model-written summary
Cadmium increased superoxide and hydrogen peroxide in rice plants.
- Taxon
- Oryza sativa L.Oryza sativae1
- Treatment
- Cd pollutione0
- Outcome
- O2(-1) and H2O2e0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cd pollution induced the antioxidant stress by inducing O2(-1) and H2O2, which increased in plants”
e1“Oryza sativa L. seedlings”
Claim · model-written summary
Cadmium exposure caused MDA accumulation in rice.
- Taxon
- Oryza sativa L.Oryza sativae2
- Treatment
- Cd pollutione1
- Outcome
- MDAe0
- Direction
- accumulatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“MDA as the final product of peroxidation of membrane lipids, accumulated in plant”
e1“Cd pollution”
e2“Oryza sativa L. seedlings”
Claim · model-written summary
Cadmium elevated SOD, peroxidase and catalase activities in rice leaves and roots.
- Taxon
- Oryza sativa L.Oryza sativae2
- Organ / stage
- leaves and rootse0
- Treatment
- Cd exposuree1
- Outcome
- activities of superoxide dismutase (SOD), peroxidase, catalasee0
- Direction
- elevatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“activities of superoxide dismutase (SOD), peroxidase, catalase, glutathione peroxidase, and ascorbate peroxidase were elevated both in leaves and roots”
e1“Cd exposure”
e2“Oryza sativa L. seedlings”
Claim · model-written summary
Cadmium elevated glutathione peroxidase and ascorbate peroxidase in rice leaves and roots.
- Taxon
- Oryza sativa L.Oryza sativae2
- Organ / stage
- leaves and rootse0
- Treatment
- Cd exposuree1
- Outcome
- glutathione peroxidase, and ascorbate peroxidasee0
- Direction
- elevatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“activities of superoxide dismutase (SOD), peroxidase, catalase, glutathione peroxidase, and ascorbate peroxidase were elevated both in leaves and roots”
e1“Cd exposure”
e2“Oryza sativa L. seedlings”
Claim · model-written summary
Leaf phytochelatins reached 3.12–6.65-fold control under cadmium.
- Taxon
- Oryza sativa L.Oryza sativae2
- Organ / stage
- leavese0
- Treatment
- Cd stresse1
- Outcome
- contents of phytochelatinse0
- Value
- 3.12-6.65-folde0
- Comparator
- controle0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“contents of phytochelatins and glutathione were about 3.12-6.65-fold and 3.27-10.73-fold in leaves, against control”
e1“Cd stress”
e2“Oryza sativa L. seedlings”
Claim · model-written summary
Leaf glutathione reached 3.27–10.73-fold control under cadmium.
- Taxon
- Oryza sativa L.Oryza sativae2
- Organ / stage
- leavese0
- Treatment
- Cd stresse1
- Outcome
- glutathionee0
- Value
- 3.27-10.73-folde0
- Comparator
- controle0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“contents of phytochelatins and glutathione were about 3.12-6.65-fold and 3.27-10.73-fold in leaves, against control”
e1“Cd stress”
e2“Oryza sativa L. seedlings”
Claim · model-written summary
Root phytochelatins reached 3.53–9.37-fold control under cadmium.
- Taxon
- Oryza sativa L.Oryza sativae2
- Organ / stage
- rootse0
- Treatment
- Cd stresse3
- Outcome
- phytochelatinse1
- Value
- 3.53-9.37-folde0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the corresponding values were about 3.53-9.37-fold and 1.41-5.11-fold in roots”
e1“contents of phytochelatins and glutathione”
e2“Oryza sativa L. seedlings”
e3“Cd stress”
Claim · model-written summary
Root glutathione reached 1.41–5.11-fold control under cadmium.
- Taxon
- Oryza sativa L.Oryza sativae2
- Organ / stage
- rootse0
- Treatment
- Cd stresse3
- Outcome
- glutathionee1
- Value
- 1.41-5.11-folde0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the corresponding values were about 3.53-9.37-fold and 1.41-5.11-fold in roots”
e1“contents of phytochelatins and glutathione”
e2“Oryza sativa L. seedlings”
e3“Cd stress”
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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.