Abstract
Our objective was to study the effects of additional Se on the physiological activity of wheat seedlings under the stress of Hg.Wheat seedlings were treated with different concentration of ρ(Se)=5~20 mg?L-1,then the height of seedling,the relative content of chlorophyll,the accumulation of MDA and antioxidant enzyme activities of Trimicum aestivum L.wheat seedlings under Hg stress(2.5 mg?L-1) were tested by field commander culture method.We found that treatment with ρ(Hg)=2.5 mg?L-1 alone led to decreasing of concentration of chlorophyll,inhibition of the activity of SOD and CAT,and increased content of MDA in sweat seedlings.In further research,we co-treated the wheat seedlings with Se and Hg at the the concentration of mg?L-1 and Hg mg?L-1 respectively.With cotreatment,chlorophyll content increased by 7.6% than the Hg treatment alone,and 3.5% higher than the control;MDA levels decreased by 38.8%,20.0% lower than the control.When treated with additional Se at high concentration more than 10 mg?L-1,the chlorophyll content of wheat seedlings decreased gradually,while MDA content showed an rising trend.Treatment with additional Se at a concentration of 5-10 mg?L-1 led to promotion of the activity of SOD and CAT,and their activities increased with the rise of Se concentration.Co-treated with Hg and Se at the concentration of ρ(Se)=10 mg?L-1 and ρ(Hg)=2.5 mg?L-1 respectively increased the activity of the two kinds of enzymes above by 21.8% and 32.8%,comparing with the single treatment with Hg.However when ρ(Se) increased at 15 mg?L-1 to 20 mg?L-1,the downtrend of their activities appear.These results elucidated that treatment with different concentration of Se and Hg appreciable impact on the physiology index,and Se can alleviate the toxicity of Hg to wheat seedlings.
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Claims 10
Claim · model-written summary
Mercury alone decreased wheat seedling chlorophyll concentration and SOD and CAT activity and increased MDA content.
- Taxon
- wheat
Triticum aestivumt0 - Treatment
- ρ(Hg)=2.5 mg?L-1e0
- Outcome
- concentration of chlorophylle0
- Direction
- decreasinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“treatment with ρ(Hg)=2.5 mg?L-1 alone led to decreasing of concentration of chlorophyll,inhibition of the activity of SOD and CAT,and increased content of MDA in sweat seedlings”
t0“wheat seeding”
Claim · model-written summary
Selenium and mercury cotreatment increased wheat seedling chlorophyll content by 7.6% over mercury alone.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- cotreatmente0
- Outcome
- chlorophyll contente0
- Direction
- increasede0
- Value
- 7.6%e0
- Comparator
- Hg treatment alonee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“With cotreatment,chlorophyll content increased by 7.6% than the Hg treatment alone”
t0“wheat seeding”
Claim · model-written summary
Selenium and mercury cotreatment increased wheat seedling chlorophyll content by 3.5% over control.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- cotreatmente1
- Outcome
- chlorophyll contente0
- Direction
- highere0
- Value
- 3.5%e0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“chlorophyll content increased by 7.6% than the Hg treatment alone,and 3.5% higher than the control”
e1“With cotreatment”
t0“wheat seeding”
Claim · model-written summary
Cotreatment decreased wheat seedling MDA levels by 38.8% relative to mercury alone.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- cotreatmente1
- Outcome
- MDA levelse0
- Direction
- decreasede0
- Value
- 38.8%e0
- Comparator
- Hg treatment alonee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“MDA levels decreased by 38.8%,20.0% lower than the control”
e1“With cotreatment,chlorophyll content increased by 7.6% than the Hg treatment alone”
t0“wheat seeding”
Claim · model-written summary
Cotreatment yielded wheat seedling MDA levels 20.0% lower than control.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- cotreatmente1
- Outcome
- MDA levelse0
- Direction
- lowere0
- Value
- 20.0%e0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“MDA levels decreased by 38.8%,20.0% lower than the control”
e1“With cotreatment,chlorophyll content increased by 7.6% than the Hg treatment alone”
t0“wheat seeding”
Claim · model-written summary
Selenium above 10 mg?L-1 gradually decreased wheat seedling chlorophyll and raised MDA.
- Taxon
- wheatTriticum aestivume0
- Treatment
- additional Se at high concentration more than 10 mg?L-1e0
- Outcome
- chlorophyll contente0
- Direction
- decreased graduallye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When treated with additional Se at high concentration more than 10 mg?L-1,the chlorophyll content of wheat seedlings decreased gradually,while MDA content showed an rising trend”
Claim · model-written summary
Selenium at 5-10 mg?L-1 promoted SOD and CAT activity in wheat seedlings, with activity increasing with selenium concentration.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- additional Se at a concentration of 5-10 mg?L-1e0
- Outcome
- activity of SOD and CATe0
- Direction
- promotione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Treatment with additional Se at a concentration of 5-10 mg?L-1 led to promotion of the activity of SOD and CAT,and their activities increased with the rise of Se concentration”
t0“wheat seeding”
Claim · model-written summary
Mercury and selenium cotreatment increased SOD activity by 21.8% compared with mercury alone.
- Treatment
- Hg and Se at the concentration of ρ(Se)=10 mg?L-1 and ρ(Hg)=2.5 mg?L-1e0
- Outcome
- activity of SODe1
- Direction
- increasede0
- Value
- 21.8%e0
- Comparator
- single treatment with Hge0
Not reportedTaxon
Verbatim
e0“Co-treated with Hg and Se at the concentration of ρ(Se)=10 mg?L-1 and ρ(Hg)=2.5 mg?L-1 respectively increased the activity of the two kinds of enzymes above by 21.8% and 32.8%,comparing with the single treatment with Hg”
e1“promotion of the activity of SOD and CAT”
Claim · model-written summary
Mercury and selenium cotreatment increased CAT activity by 32.8% compared with mercury alone.
- Treatment
- Hg and Se at the concentration of ρ(Se)=10 mg?L-1 and ρ(Hg)=2.5 mg?L-1e0
- Outcome
- CATe1
- Direction
- increasede0
- Value
- 32.8%e0
- Comparator
- single treatment with Hge0
Not reportedTaxon
Verbatim
e0“Co-treated with Hg and Se at the concentration of ρ(Se)=10 mg?L-1 and ρ(Hg)=2.5 mg?L-1 respectively increased the activity of the two kinds of enzymes above by 21.8% and 32.8%,comparing with the single treatment with Hg”
e1“promotion of the activity of SOD and CAT”
Claim · model-written summary
At 15–20 mg?L-1 selenium, SOD and CAT activities trended downward.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- ρ(Se) increased at 15 mg?L-1 to 20 mg?L-1e0
- Outcome
- activity of SOD and CATe1
- Direction
- downtrende0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“when ρ(Se) increased at 15 mg?L-1 to 20 mg?L-1,the downtrend of their activities appear”
e1“promotion of the activity of SOD and CAT”
t0“wheat seeding”
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See all 13 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.