Abstract
Abstract Selenium is considered an essential element for animals. Despite that it has not been demonstrated to be essential for higher plants, it has been attributed with a protective role against reactive oxygen species in plants subjected to stress. In this study, lettuce plants ( Lactuca sativa cv. Philipus) received different application rates (5, 10, 20, 40, 60, 80 and 120 μM) of selenite or selenate, with the aim of testing the effect of Se on the production and detoxification of H 2 O 2 in non‐stressed plants. The results indicate that the form selenate is less toxic than selenite; that is, the plants tolerated and responded positively to this element, and even increasing in growth up to a rate of 40 μM for the form selenate. On the contrary, the application of selenite triggered a higher foliar concentration of H 2 O 2 and a higher induction of lipid peroxidation [malondialdehyde content and lipoxygenase activity] in comparison to that observed after the selenate application. Also, the plants treated with selenate induced higher increases in enzymes that detoxify H 2 O 2 , especially ascorbate peroxidase and glutathione (GSH) peroxidase, as well as an increase in the foliar concentration of antioxidant compounds such as ascorbate and GSH. These data indicate that an application of selenate at low rates can be used to prevent the induction in plants of the antioxidant system, thereby improving stress resistance.
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Claims 7
Claim · model-written summary
Selenate was less toxic than selenite.
- Taxon
- lettuce plants
Lactuca sativat0 - Treatment
- selenatee0
- Outcome
- toxice0
- Direction
- lesse0
- Comparator
- selenitee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the form selenate is less toxic than selenite”
t0“lettuce plants”
Claim · model-written summary
Selenate increased lettuce growth through 40 μM.
- Taxon
- lettuce plantsLactuca sativat0
- Treatment
- selenatee0
- Outcome
- growthe0
- Direction
- increasinge0
- Qualifier
- 40 μMe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increasing in growth up to a rate of 40 μM for the form selenate.”
t0“lettuce plants”
Claim · model-written summary
Selenite caused higher foliar hydrogen peroxide than selenate.
- Taxon
- lettuce plantsLactuca sativat0
- Treatment
- selenitee0
- Outcome
- foliar concentration of H 2 O 2e0
- Direction
- highere0
- Comparator
- selenate applicatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the application of selenite triggered a higher foliar concentration of H 2 O 2 and a higher induction of lipid peroxidation [malondialdehyde content and lipoxygenase activity] in comparison to that observed after the selenate application.”
t0“lettuce plants”
Claim · model-written summary
Selenite caused higher lipid peroxidation indicators than selenate.
- Taxon
- lettuce plantsLactuca sativat0
- Treatment
- selenitee0
- Outcome
- lipid peroxidation [malondialdehyde content and lipoxygenase activity]e0
- Direction
- highere0
- Comparator
- selenate applicatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the application of selenite triggered a higher foliar concentration of H 2 O 2 and a higher induction of lipid peroxidation [malondialdehyde content and lipoxygenase activity] in comparison to that observed after the selenate application.”
t0“lettuce plants”
Claim · model-written summary
Selenate increased ascorbate peroxidase and GSH peroxidase activities.
- Taxon
- lettuce plantsLactuca sativat0
- Treatment
- selenatee0
- Outcome
- ascorbate peroxidase and glutathione (GSH) peroxidasee0
- Direction
- higher increasese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“plants treated with selenate induced higher increases in enzymes that detoxify H 2 O 2 , especially ascorbate peroxidase and glutathione (GSH) peroxidase”
t0“lettuce plants”
Claim · model-written summary
Selenate increased foliar ascorbate and GSH.
- Taxon
- lettuce plantsLactuca sativat0
- Treatment
- selenatee1
- Outcome
- foliar concentration of antioxidant compounds such as ascorbate and GSHe0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“an increase in the foliar concentration of antioxidant compounds such as ascorbate and GSH.”
t0“lettuce plants”
e1“the form selenate is less toxic than selenite”
Claim · model-written summary
The authors suggest low rate selenate for stress resistance.
- Taxon
- lettuce plantsLactuca sativat0
- Treatment
- selenate at low ratese0
- Outcome
- improving stress resistancee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“an application of selenate at low rates can be used to prevent the induction in plants of the antioxidant system, thereby improving stress resistance.”
t0“lettuce plants”
The same questions in other papers
selenate · growth · Lactuca sativa (garden lettuce)Positive and negative results
2 papers in the same direction as this paper · 1 in the opposite direction
- positive
- no effect
- positive
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.