Abstract
Abstract Selenium is known to be important in antioxidation in human and animals, but little attention has been paid to its role in higher plants. Chemically it is a photovoltaic element, and in order to study its effects on plants, ryegrass ( Lolium perenne L.) and lettuce ( Lactuca sativa L.) were cultivated in a pot experiment without or with H 2 SeO 4 (0.1 and 1.0 mg Se kg −1 ) under normal light or subjected to UV(B)‐irradiation episodes. Without Se addition, UV(B) diminished markedly the yield of lettuce (by 8%) but not that of ryegrass. The lower Se dosage had no effect on yields under normal light conditions, but in combination with UV(B) it enhanced plant growth. This indicates that UV light acted as a trigger for the growth‐promoting effect of Se. The higher Se dosage was toxic to plants, but the toxicity was alleviated under UV(B). The positive interaction between the high‐energy light and Se was manifested also as increased concentrations of nucleic acids and soluble proteins. The synergistic effect was partly attributable to the antioxidative function of Se, shown as inhibition of lipid peroxidation and promotion of glutathione peroxidase (GSH‐Px) activity. Some other possible mechanisms of the positive action of Se are discussed.
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Claims 11
Claim · model-written summary
UV(B) markedly decreased lettuce yield by 8% without Se addition.
- Taxon
- lettuce
Lactuca sativae1 - Treatment
- UV(B)e1
- Outcome
- yielde1
- Direction
- diminishede1
- Value
- 8%e1
- Qualifier
- Without Se additione1
- Setting
- pot experimente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“ryegrass ( Lolium perenne L.) and lettuce ( Lactuca sativa L.) were cultivated in a pot experiment”
e1“Without Se addition, UV(B) diminished markedly the yield of lettuce (by 8%) but not that of ryegrass”
Claim · model-written summary
UV(B) did not change ryegrass yield without Se addition.
- Treatment
- UV(B)e1
- Outcome
- yielde1
- Direction
- no_changeinferrede1
- Qualifier
- Without Se additione1
- Setting
- pot experimente0
LoliumNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“ryegrass ( Lolium perenne L.) and lettuce ( Lactuca sativa L.) were cultivated in a pot experiment”
e1“Without Se addition, UV(B) diminished markedly the yield of lettuce (by 8%) but not that of ryegrass”
Claim · model-written summary
The lower Se dosage had no effect on yields under normal light.
- Taxon
- ryegrass ( Lolium perenne L.) and lettuce ( Lactuca sativa L.)Lactuca sativa
Lolium perennee0 - Treatment
- lower Se dosagee2
- Outcome
- yieldse2
- Direction
- no effecte2
- Setting
- normal light conditionse2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“ryegrass ( Lolium perenne L.) and lettuce ( Lactuca sativa L.) were cultivated in a pot experiment”
e2“The lower Se dosage had no effect on yields under normal light conditions, but in combination with UV(B) it enhanced plant growth”
Claim · model-written summary
The higher Se dosage was toxic to plants.
- Taxon
- ryegrass ( Lolium perenne L.) and lettuce ( Lactuca sativa L.)Lactuca sativaLolium perennee0
- Treatment
- higher Se dosagee3
- Outcome
- toxice3
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“ryegrass ( Lolium perenne L.) and lettuce ( Lactuca sativa L.) were cultivated in a pot experiment”
e3“The higher Se dosage was toxic to plants, but the toxicity was alleviated under UV(B)”
Claim · model-written summary
UV(B) alleviated the toxicity of the higher Se dosage.
- Taxon
- ryegrass ( Lolium perenne L.) and lettuce ( Lactuca sativa L.)Lactuca sativaLolium perennee0
- Treatment
- UV(B)e3
- Outcome
- toxicitye3
- Direction
- alleviatede3
- Comparator
- higher Se dosagee3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“ryegrass ( Lolium perenne L.) and lettuce ( Lactuca sativa L.) were cultivated in a pot experiment”
e3“The higher Se dosage was toxic to plants, but the toxicity was alleviated under UV(B)”
Claim · model-written summary
The lower Se dosage combined with UV(B) enhanced plant growth.
- Taxon
- ryegrass ( Lolium perenne L.) and lettuce ( Lactuca sativa L.)Lactuca sativaLolium perennee0
- Treatment
- lower Se dosagee2
- Outcome
- plant growthe2
- Direction
- enhancede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“ryegrass ( Lolium perenne L.) and lettuce ( Lactuca sativa L.) were cultivated in a pot experiment”
e2“The lower Se dosage had no effect on yields under normal light conditions, but in combination with UV(B) it enhanced plant growth”
Claim · model-written summary
UV light acted as a trigger for the growth-promoting effect of Se, as the authors interpret.
- Taxon
- ryegrass ( Lolium perenne L.) and lettuce ( Lactuca sativa L.)Lactuca sativaLolium perennee0
- Compound
- See6
- Outcome
- plant growthe2
- Qualifier
- UV light acted as a triggere7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“ryegrass ( Lolium perenne L.) and lettuce ( Lactuca sativa L.) were cultivated in a pot experiment”
e2“The lower Se dosage had no effect on yields under normal light conditions, but in combination with UV(B) it enhanced plant growth”
e7“This indicates that UV light acted as a trigger”
e6“The synergistic effect was partly attributable to the antioxidative function of Se”
Claim · model-written summary
Se combined with high-energy light increased nucleic acid and soluble protein concentrations.
- Taxon
- ryegrass ( Lolium perenne L.) and lettuce ( Lactuca sativa L.)Lactuca sativaLolium perennee0
- Treatment
- See6
- Outcome
- concentrations of nucleic acids and soluble proteinse4
- Direction
- increasede4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“ryegrass ( Lolium perenne L.) and lettuce ( Lactuca sativa L.) were cultivated in a pot experiment”
e4“was manifested also as increased concentrations of nucleic acids and soluble proteins”
e6“The synergistic effect was partly attributable to the antioxidative function of Se”
Claim · model-written summary
Se antioxidative function inhibited lipid peroxidation.
- Taxon
- ryegrass ( Lolium perenne L.) and lettuce ( Lactuca sativa L.)Lactuca sativaLolium perennee0
- Treatment
- See6
- Outcome
- lipid peroxidatione5
- Direction
- inhibitione5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“ryegrass ( Lolium perenne L.) and lettuce ( Lactuca sativa L.) were cultivated in a pot experiment”
e5“shown as inhibition of lipid peroxidation and promotion of glutathione peroxidase”
e6“The synergistic effect was partly attributable to the antioxidative function of Se”
Claim · model-written summary
Se promoted glutathione peroxidase activity.
- Taxon
- ryegrass ( Lolium perenne L.) and lettuce ( Lactuca sativa L.)Lactuca sativaLolium perennee0
- Treatment
- See6
- Gene
- glutathione peroxidasee5
- Outcome
- promotion of glutathione peroxidasee5
- Direction
- promotione5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“ryegrass ( Lolium perenne L.) and lettuce ( Lactuca sativa L.) were cultivated in a pot experiment”
e5“shown as inhibition of lipid peroxidation and promotion of glutathione peroxidase”
e6“The synergistic effect was partly attributable to the antioxidative function of Se”
Claim · model-written summary
The synergistic effect is partly attributable to the antioxidative function of Se.
- Taxon
- ryegrass ( Lolium perenne L.) and lettuce ( Lactuca sativa L.)Lactuca sativaLolium perennee0
- Compound
- See6
- Outcome
- synergistic effecte6
- Qualifier
- antioxidative function of See6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“ryegrass ( Lolium perenne L.) and lettuce ( Lactuca sativa L.) were cultivated in a pot experiment”
e6“The synergistic effect was partly attributable to the antioxidative function of Se”
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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.