Abstract
Response of lettuce and rhizosphere biota to successive addition of zinc (Zn) and cadmium (Cd) was assessed in a pot experiment using limed and unlimed tropical Entisol. Cadmium (2.5 mg kg−1 soil) and Zn (50 mg kg−1 soil) were spiked to soil 1 month after germination, and successive applications were superimposed as 5 and 10 times the first dose. Plants were analyzed for metal uptake and mycorrhizal colonization 1 week after each metal application. Rhizosphere soils were assessed for extractable Zn and Cd as well as populations of bacteria, fungi, and metal-tolerant fungi. The greatest metal doses resulted in 84–88 mg Zn and 8–10 mg Cd kg−1 soil and 5–7.5 mg Cd and 70–72 mg Zn kg−1 dry matter. Metal-tolerant fungi population increased from 9–13% to 26–63%, but mycorrhizal colonization and bacterial population were inhibited by 88% and 96%, respectively. Liming had relieved metal stress on rhizosphere biota but did not affect metal uptake.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 9
Claim · model-written summary
Greatest metal doses yielded 84–88 mg Zn per kg soil.
- Taxon
- Lettuce
Lactuca sativat0 - Outcome
- Zne0
- Value
- 84–88 mg Zne0
- Qualifier
- greatest metal dosese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The greatest metal doses resulted in 84–88 mg Zn and 8–10 mg Cd kg−1 soil”
t0“Lettuce”
Claim · model-written summary
Greatest metal doses yielded 8–10 mg Cd per kg soil.
- Taxon
- LettuceLactuca sativat0
- Outcome
- Cde0
- Value
- 8–10 mg Cd kg−1 soile0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The greatest metal doses resulted in 84–88 mg Zn and 8–10 mg Cd kg−1 soil”
t0“Lettuce”
Claim · model-written summary
At greatest doses, lettuce dry matter had 5–7.5 mg Cd per kg.
- Taxon
- LettuceLactuca sativat0
- Outcome
- Cde0
- Value
- 5–7.5 mg Cde0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“5–7.5 mg Cd and 70–72 mg Zn kg−1 dry matter”
t0“Lettuce”
Claim · model-written summary
At greatest doses, lettuce dry matter had 70–72 mg Zn per kg.
- Taxon
- LettuceLactuca sativat0
- Outcome
- Zne0
- Value
- 70–72 mg Zn kg−1 dry mattere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“5–7.5 mg Cd and 70–72 mg Zn kg−1 dry matter”
t0“Lettuce”
Claim · model-written summary
Metal-tolerant fungi population increased from 9–13% to 26–63%.
- Taxon
- LettuceLactuca sativat0
- Interactor
- Metal-tolerant fungie0symbiont
- Outcome
- Metal-tolerant fungi populatione0
- Direction
- increasede0
- Value
- 26–63%e0
- Qualifier
- 9–13%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Metal-tolerant fungi population increased from 9–13% to 26–63%”
t0“Lettuce”
Claim · model-written summary
Mycorrhizal colonization was inhibited by 88%.
- Taxon
- LettuceLactuca sativat0
- Treatment
- successive addition of zinc (Zn) and cadmium (Cd)e1
- Outcome
- mycorrhizal colonizatione0
- Direction
- inhibitede0
- Value
- 88%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“mycorrhizal colonization and bacterial population were inhibited by 88% and 96%, respectively”
t0“Lettuce”
e1“successive addition of zinc (Zn) and cadmium (Cd)”
Claim · model-written summary
Bacterial population was inhibited by 96%.
- Taxon
- LettuceLactuca sativat0
- Treatment
- successive addition of zinc (Zn) and cadmium (Cd)e1
- Outcome
- bacterial populatione0
- Direction
- inhibitede0
- Value
- 96%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“mycorrhizal colonization and bacterial population were inhibited by 88% and 96%, respectively”
t0“Lettuce”
e1“successive addition of zinc (Zn) and cadmium (Cd)”
Claim · model-written summary
Liming relieved metal stress on rhizosphere biota.
- Taxon
- LettuceLactuca sativat0
- Treatment
- Liminge0
- Outcome
- metal stress on rhizosphere biotae0
- Direction
- relievede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Liming had relieved metal stress on rhizosphere biota”
t0“Lettuce”
Claim · model-written summary
Liming did not affect metal uptake.
- Taxon
- LettuceLactuca sativat0
- Treatment
- Liminge0
- Outcome
- metal uptakee0
- Direction
- did not affecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Liming had relieved metal stress on rhizosphere biota but did not affect metal uptake.”
t0“Lettuce”
The same questions in other papers
cadmium atom · disease · Lactuca sativa (garden lettuce)Positive and negative results
1 in the opposite direction
- positive
zinc atom · disease · Lactuca sativa (garden lettuce)Results agree
1 paper in the same direction as this paper
- negative
lime · nutrient: content · Lactuca sativa (garden lettuce)Positive and negative results
2 papers in the same direction as this paper · 6 in the opposite direction
- positive
- 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.