Abstract
Effects of toxic concentrations (up to 100 µM) of copper (Cu) and manganese (Mn) on growth and oxidative defense system of rice (Oryza sativa L.) and sunflower (Helianthus annuus L.) were studied under three light intensities in hydroponic medium. Rice expressed higher susceptibility to both Cu and Mn toxicity than sunflower. Higher light intensity strengthened the effect of toxicity of Cu while ameliorated that of Mn. Activity of ascorbate peroxidase and glutathione reductase responded to Cu and Mn differently in rice. Cu toxicity increased their activity but Mn did not change or rather decreased it. Activity of catalase was induced in response to both Cu and Mn particularly under higher light intensities. Activity of peroxidase, in contrast to other tested enzymes, was correlated with growth response of plants. Copper was not effective in induction of malondialdehyde accumulation. Mn, in concentrations causing no growth inhibition (100 µM), resulted in a significant increase of malondialdehyde. Changes in the tissue content of proline, similar with peroxidase activity, was mainly associated with stress conditions as judged by growth data. On the other word, activity of peroxidase and accumulation of proline monitored the stress conditions without any protecting role and any effect on adaptation of plants. Our results suggested that the antioxidant capacity of plants is not independently correlated with the growth response of plants without regarding the other physiological responses to metal exposure.
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Claims 12
Claim · model-written summary
Rice showed higher susceptibility to Cu and Mn toxicity than sunflower.
- Taxon
- rice
Oryza sativae2 - Treatment
- Cu and Mn toxicitye2
- Outcome
- susceptibilitye2
- Direction
- highere2
- Comparator
- sunflowere2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Effects of toxic concentrations (up to 100 µM) of copper (Cu) and manganese (Mn) on growth and oxidative defense system of rice (Oryza sativa L.) and sunflower (Helianthus annuus L.) were studied under three light intensities in hydroponic medium”
e2“Rice expressed higher susceptibility to both Cu and Mn toxicity than sunflower”
Claim · model-written summary
Higher light intensity strengthened the effect of Cu toxicity on rice.
- Taxon
- riceOryza sativae1
- Treatment
- Higher light intensitye3
- Outcome
- effect of toxicitye3
- Direction
- strengthenede3
- Qualifier
- of Cue3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Effects of toxic concentrations (up to 100 µM) of copper (Cu) and manganese (Mn) on growth and oxidative defense system of rice (Oryza sativa L.) and sunflower (Helianthus annuus L.) were studied under three light intensities in hydroponic medium”
e3“Higher light intensity strengthened the effect of toxicity of Cu while ameliorated that of Mn”
Claim · model-written summary
Higher light intensity ameliorated the effect of Mn toxicity on rice.
- Taxon
- riceOryza sativae1
- Treatment
- Higher light intensitye3
- Outcome
- effect of toxicitye3
- Direction
- amelioratede3
- Qualifier
- of Mne3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Effects of toxic concentrations (up to 100 µM) of copper (Cu) and manganese (Mn) on growth and oxidative defense system of rice (Oryza sativa L.) and sunflower (Helianthus annuus L.) were studied under three light intensities in hydroponic medium”
e3“Higher light intensity strengthened the effect of toxicity of Cu while ameliorated that of Mn”
Claim · model-written summary
Cu toxicity increased ascorbate peroxidase and glutathione reductase activity in rice.
- Taxon
- riceOryza sativae4
- Treatment
- Cu toxicitye5
- Outcome
- Activity of ascorbate peroxidase and glutathione reductasee4
- Direction
- increasede5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“Activity of ascorbate peroxidase and glutathione reductase responded to Cu and Mn differently in rice”
e5“Cu toxicity increased their activity but Mn did not change or rather decreased it”
Claim · model-written summary
Mn did not change or rather decreased ascorbate peroxidase and glutathione reductase activity in rice.
- Taxon
- riceOryza sativae4
- Treatment
- Mne5
- Outcome
- Activity of ascorbate peroxidase and glutathione reductasee4
- Direction
- did not change or rather decreasede5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“Activity of ascorbate peroxidase and glutathione reductase responded to Cu and Mn differently in rice”
e5“Cu toxicity increased their activity but Mn did not change or rather decreased it”
Claim · model-written summary
Catalase activity was induced by both Cu and Mn, particularly under higher light intensities.
- Taxon
- rice (Oryza sativa L.) and sunflower (Helianthus annuus L.)
Helianthus annuusOryza sativae1 - Treatment
- Cu and Mne6
- Outcome
- Activity of catalasee6
- Direction
- inducede6
- Qualifier
- particularly under higher light intensitiese6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Effects of toxic concentrations (up to 100 µM) of copper (Cu) and manganese (Mn) on growth and oxidative defense system of rice (Oryza sativa L.) and sunflower (Helianthus annuus L.) were studied under three light intensities in hydroponic medium”
e6“Activity of catalase was induced in response to both Cu and Mn particularly under higher light intensities”
Claim · model-written summary
Peroxidase activity was correlated with growth response of plants, unlike other tested enzymes.
- Taxon
- rice (Oryza sativa L.) and sunflower (Helianthus annuus L.)Helianthus annuusOryza sativae1
- Gene
- peroxidasee7
- Outcome
- growth response of plantse7
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Effects of toxic concentrations (up to 100 µM) of copper (Cu) and manganese (Mn) on growth and oxidative defense system of rice (Oryza sativa L.) and sunflower (Helianthus annuus L.) were studied under three light intensities in hydroponic medium”
e7“Activity of peroxidase, in contrast to other tested enzymes, was correlated with growth response of plants”
Claim · model-written summary
Copper was not effective in inducing malondialdehyde accumulation.
- Taxon
- rice (Oryza sativa L.) and sunflower (Helianthus annuus L.)Helianthus annuusOryza sativae1
- Treatment
- Coppere2
- Outcome
- malondialdehyde accumulatione2
- Direction
- not effective in inductione2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Effects of toxic concentrations (up to 100 µM) of copper (Cu) and manganese (Mn) on growth and oxidative defense system of rice (Oryza sativa L.) and sunflower (Helianthus annuus L.) were studied under three light intensities in hydroponic medium”
e2“Copper was not effective in induction of malondialdehyde accumulation”
Claim · model-written summary
Mn at 100 µM, causing no growth inhibition, significantly increased malondialdehyde.
- Taxon
- rice (Oryza sativa L.) and sunflower (Helianthus annuus L.)Helianthus annuusOryza sativae1
- Treatment
- Mne2
- Outcome
- malondialdehydee2
- Direction
- increasee2
- Qualifier
- in concentrations causing no growth inhibition (100 µM)e2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Effects of toxic concentrations (up to 100 µM) of copper (Cu) and manganese (Mn) on growth and oxidative defense system of rice (Oryza sativa L.) and sunflower (Helianthus annuus L.) were studied under three light intensities in hydroponic medium”
e2“Mn, in concentrations causing no growth inhibition (100 µM), resulted in a significant increase of malondialdehyde”
Claim · model-written summary
Tissue proline content changes were associated with stress conditions, similar to peroxidase activity.
- Taxon
- rice (Oryza sativa L.) and sunflower (Helianthus annuus L.)Helianthus annuusOryza sativae1
- Treatment
- stress conditionse2
- Outcome
- tissue content of prolinee2
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Effects of toxic concentrations (up to 100 µM) of copper (Cu) and manganese (Mn) on growth and oxidative defense system of rice (Oryza sativa L.) and sunflower (Helianthus annuus L.) were studied under three light intensities in hydroponic medium”
e2“Changes in the tissue content of proline, similar with peroxidase activity, was mainly associated with stress conditions as judged by growth data”
Claim · model-written summary
Peroxidase activity and proline accumulation tracked stress conditions but had no protecting role in plants.
- Taxon
- rice (Oryza sativa L.) and sunflower (Helianthus annuus L.)Helianthus annuusOryza sativae1
- Treatment
- stress conditionse2
- Gene
- activity of peroxidasee2
- Outcome
- protecting rolee2
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Effects of toxic concentrations (up to 100 µM) of copper (Cu) and manganese (Mn) on growth and oxidative defense system of rice (Oryza sativa L.) and sunflower (Helianthus annuus L.) were studied under three light intensities in hydroponic medium”
e2“activity of peroxidase and accumulation of proline monitored the stress conditions without any protecting role and any effect on adaptation of plants”
Claim · model-written summary
The antioxidant capacity of plants was not independently correlated with their growth response.
- Taxon
- rice (Oryza sativa L.) and sunflower (Helianthus annuus L.)Helianthus annuusOryza sativae1
- Treatment
- antioxidant capacity of plantse2
- Outcome
- growth response of plantse2
- Direction
- not independently correlatede2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Effects of toxic concentrations (up to 100 µM) of copper (Cu) and manganese (Mn) on growth and oxidative defense system of rice (Oryza sativa L.) and sunflower (Helianthus annuus L.) were studied under three light intensities in hydroponic medium”
e2“Our results suggested that the antioxidant capacity of plants is not independently correlated with the growth response of plants”
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light · pest · Oryza sativa (rice)Positive and negative results
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See all 5 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.