lead atom · Physiology: pigments · Helianthus annuus (common sunflower)
6 claims from these papers.
Papers whose results differ, checked claim by claim 2
2 pairs of papers on this question report results that differ: an effect in one paper, the opposite effect or no effect in the other. Two model reviewers reading both claims accepted each pair.
Each paper in the lists below is placed by all its claims here taken together, positive if any claim is positive. A pair compares one claim of each paper, so a paper placed on the positive side can also report a decrease or no effect.
- Effect of excess lead on sunflower growth and photosynthesis (1998)
decreaseLead treatment markedly reduced chlorophyll content.
Morpho - Physiological Responses of Sunflower (Helianthus annus L) Exposed to Lead and Cyanide Stress (2025)no changeTotal chlorophyll did not differ significantly across lead concentrations.
What separates themTest system: controlled environment · laboratoryCompare the two papers → - Toxic Effects of Lead on Growth and Some Biochemical and Ionic Parameters of Sunflower (Helianthus annuus L.) Seedlings (2011)
decreaseLead reduced leaf chlorophyll, catalase activity, potassium and calcium.
Morpho - Physiological Responses of Sunflower (Helianthus annus L) Exposed to Lead and Cyanide Stress (2025)no changeTotal chlorophyll did not differ significantly across lead concentrations.
What separates themTest system: controlled environment · laboratoryCompare the two papers →
How these papers cite each other
None of these papers cites another one here.
- Positive result
- Negative result or no effect
- Citation, pointing to the cited paper
- Citation across the two sides
- Larger circle: more citations overall
Years run left to right. Citations come from the papers’ OpenAlex reference lists. Hover a paper to bring forward its citations; click it to open the paper.
Papers reporting a negative result or no effect 5
Effect of excess lead on sunflower growth and photosynthesis · 1998
- negative
- negative
- negative
- negative
- negative
- no effect
A paper is on the positive side when any of its claims here is positive. Claims are grouped by organism, treatment and what was measured or targeted. Claims that compare genotypes are left out; a claim about lacking a nutrient counts the other way round in that nutrient’s question. “Results differ” marks a question where two model reviewers, reading both claims, accepted at least one pair of papers whose results differ.
lead atom on Helianthus annuus (common sunflower) against other targets
lead atom · physiology: pigments on other organisms
- Brassica juncea (Indian mustard)
- Triticum aestivum (wheat)
- Zea mays (maize)
- Nicotiana tabacum (tobacco)
- Phaseolus vulgaris (common bean)
- Brassica napus (oilseed rape)
- Hordeum vulgare (barley)
- Lolium perenne (perennial ryegrass)
- Lactuca sativa (garden lettuce)
- Solanum lycopersicum (tomato)
- Oryza sativa (rice)
- Solanum melongena (eggplant)