Abstract
Abstract Four lettuce (Lactuca saliva L.) varieties ('Benita’, ‘Wendy’, ‘Mirena’, and ‘Jacky') were grown for 43 days in a pH‐controlled complete nutrient solution without cadmium (Cd) or with either 0.01 or 0.03 mg Cd/1 and with NH4 or NO3 as the form of nitrogen nutrition. Cadmium did not affect dry matter yield. ‘Wendy’ had a significantly higher total dry matter production when grown on NO3 compared to NH4, whereas growth of ‘Mirena’ was best on NH4 (P<0.05). Dry weights of ‘Benita’ and ‘Jacky’ were not affected by the N source. Cadmium concentrations in shoots (and roots) of plants grown on NH4 were significantly higher than in plants grown on NO3. The Zn concentrations in the shoots were also enhanced. The distribution of Cd in the lettuce varieties was independent of the form of N nutrition. It is concluded that the N source directly affects the amount of Cd taken up, without influencing the Cd distribution.
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Claims 8
Claim · model-written summary
Cadmium did not affect lettuce dry matter yield.
- Taxon
- lettuce
Lactuca sativat0 - Treatment
- Cadmiume0
- Outcome
- dry matter yielde0
- Direction
- did not affecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cadmium did not affect dry matter yield”
t0“lettuce varieties”
Claim · model-written summary
Wendy produced significantly more total dry matter on NO3 than NH4.
- Taxon
- lettuceLactuca sativat0
- Material
- ‘Wendy’e0
- Treatment
- NO3e0
- Outcome
- total dry matter productione0
- Direction
- highere0
- Comparator
- NH4e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“‘Wendy’ had a significantly higher total dry matter production when grown on NO3 compared to NH4”
t0“lettuce varieties”
Claim · model-written summary
Mirena grew best on NH4.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“growth of ‘Mirena’ was best on NH4 (P<0.05)”
t0“lettuce varieties”
Claim · model-written summary
Benita dry weight was unaffected by nitrogen source.
- Taxon
- lettuceLactuca sativat0
- Material
- ‘Benita’e0
- Treatment
- N sourcee0
- Outcome
- Dry weightse0
- Direction
- not affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Dry weights of ‘Benita’ and ‘Jacky’ were not affected by the N source”
t0“lettuce varieties”
Claim · model-written summary
Jacky dry weight was unaffected by nitrogen source.
- Taxon
- lettuceLactuca sativat0
- Material
- ‘Jacky’e0
- Treatment
- N sourcee0
- Outcome
- Dry weightse0
- Direction
- not affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Dry weights of ‘Benita’ and ‘Jacky’ were not affected by the N source”
t0“lettuce varieties”
Claim · model-written summary
NH4-grown lettuce had significantly higher cadmium concentrations in shoots and roots than NO3-grown plants.
- Taxon
- lettuceLactuca sativat0
- Treatment
- NH4e0
- Outcome
- Cadmium concentrations in shoots (and roots)e0
- Direction
- highere0
- Comparator
- NO3e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cadmium concentrations in shoots (and roots) of plants grown on NH4 were significantly higher than in plants grown on NO3”
t0“lettuce varieties”
Claim · model-written summary
Shoot zinc concentrations were enhanced under NH4 nutrition.
- Taxon
- lettuceLactuca sativat0
- Treatment
- NH4e1
- Outcome
- Zn concentrations in the shootse0
- Direction
- enhancede0
- Comparator
- NO3e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The Zn concentrations in the shoots were also enhanced”
e1“plants grown on NH4 were significantly higher than in plants grown on NO3”
t0“lettuce varieties”
Claim · model-written summary
Cadmium distribution among lettuce varieties was independent of nitrogen form.
- Taxon
- lettuceLactuca sativae0
- Treatment
- form of N nutritione0
- Outcome
- distribution of Cde0
- Direction
- independente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The distribution of Cd in the lettuce varieties was independent of the form of N nutrition”
The same questions in other papers
cadmium atom · yield · Lactuca sativa (garden lettuce)Results differ
6 papers in the same direction as this paper · 2 in the opposite direction
- no effect
- positive
- positive
5 papers more in this group
See all 9 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.