Abstract
Selenium is an important element associated with enhancement of antioxidant activity in plants, microorganisms, animals, and humans. In Brazil, the information on Se in agricultural crops is lacking, though there are indications that low levels of Se are consumed by the population. The experiment was conducted under greenhouse conditions with pots containing 3 l of nutritive solution in a completely randomized factorial design, with seven Se concentrations (0, 2, 4, 8, 16, 32, and 64 µmol/l) and two forms of Se (sodium selenate - Na2SeO4 and sodium selenite - Na2SeO3), with six replicates. The application of Se as selenate at low concentrations is more appropriate for lettuce biofortification because it favors shoot biomass growth and Se levels in the shoot biomass. Selenium in both forms had two effects on lettuce plant metabolism: at low doses it acted as an antioxidant and enhanced plant growth, whereas at higher levels it reduced yield.
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Claims 4
Claim · model-written summary
Selenium applied as selenate at low concentrations favours lettuce shoot biomass growth and shoot selenium levels, making it more appropriate for biofortification.
- Taxon
- lettuce
Lactuca sativat0 - Organ / stage
- shoot biomasse1
- Treatment
- Se as selenate at low concentrationse1
- Outcome
- shoot biomass growth and Se levels in the shoot biomasse1
- Direction
- favorse1
- Setting
- greenhouse conditionse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Selenium biofortification and antioxidant activity in lettuce plants fed with selenate and selenite”
e0“The experiment was conducted under greenhouse conditions”
e1“The application of Se as selenate at low concentrations is more appropriate for lettuce biofortification because it favors shoot biomass growth and Se levels in the shoot biomass”
Claim · model-written summary
Selenium at low doses enhanced lettuce plant growth.
- Taxon
- lettuceLactuca sativat0
- Treatment
- at low dosese2
- Outcome
- plant growthe2
- Direction
- enhancede2
- Setting
- greenhouse conditionse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Selenium biofortification and antioxidant activity in lettuce plants fed with selenate and selenite”
e0“The experiment was conducted under greenhouse conditions”
e2“Selenium in both forms had two effects on lettuce plant metabolism: at low doses it acted as an antioxidant and enhanced plant growth, whereas at higher levels it reduced yield”
Claim · model-written summary
Selenium at low doses increased antioxidant activity in lettuce.
- Taxon
- lettuceLactuca sativat0
- Treatment
- at low dosese2
- Outcome
- antioxidante2
- Direction
- increaseinferrede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Selenium biofortification and antioxidant activity in lettuce plants fed with selenate and selenite”
e2“Selenium in both forms had two effects on lettuce plant metabolism: at low doses it acted as an antioxidant and enhanced plant growth, whereas at higher levels it reduced yield”
Claim · model-written summary
Selenium at higher levels reduced lettuce yield.
- Taxon
- lettuceLactuca sativat0
- Treatment
- at higher levelse2
- Outcome
- yielde2
- Direction
- reducede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Selenium biofortification and antioxidant activity in lettuce plants fed with selenate and selenite”
e2“Selenium in both forms had two effects on lettuce plant metabolism: at low doses it acted as an antioxidant and enhanced plant growth, whereas at higher levels it reduced yield”
The same questions in other papers
selenate · growth · Lactuca sativa (garden lettuce)Positive and negative results
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- positive
- no effect
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selenium atom · growth · Lactuca sativa (garden lettuce)Positive and negative results
6 papers in the same direction as this paper · 7 in the opposite direction
- negative
- positive
- positive
10 papers more in this group
See all 14 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.