Abstract
Chlorophyll and carotenoid content (ChCar), lipid peroxidation (LP) and growth parameters (GP) in plants are often used for environmental pollution estimation. However, the nonmonotonic dose-response dependences (hormesis and paradoxical effects) of these indices are insufficiently explored following exposure to different pollutants. In this experiment, we studied nonmonotonic changes in ChCar, LP, GP in wheat seedlings (Triticum aestivum L.) upon exposure to lead, cadmium, copper, manganese, formaldehyde, the herbicide glyphosate, and sodium chloride in a wide range from sublethal concentration to 10(2)-10(5) times lower concentrations. 85.7% of dose-response dependences were nonmonotonic (of these, 5.5% were hormesis and paradoxical effects comprised 94.5%). Multiphasic dependences were the most widespread type of paradoxical effect. Hormesis was a part of some multiphasic responses (i.e. paradoxical effects), which indicates a relationship between these phenomena. Sublethal pollutant concentrations significantly increased LP (to 2.0-2.4 times, except for manganese and glyphosate) and decreased GP (to 2.1-36.6 times, except for glyphosate), while ChCar was reduced insignificantly, normalized or even increased. Lower pollutant concentrations caused a moderate deviation in all parameters from the control (not more than 62%) for hormesis and paradoxical effects. The seedling parameters could have different types of nonmonotonic responses upon exposure to the same pollutant.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by-nc. 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 10
Claim · model-written summary
85.7% of dose-response relationships were nonmonotonic.
- Taxon
- Wheat
Triticum aestivumt0 - Outcome
- dose-response dependencese0
- Direction
- nonmonotonice0
- Value
- 85.7%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“85.7% of dose-response dependences were nonmonotonic”
t0“Wheat Seedling”
Claim · model-written summary
5.5% of nonmonotonic responses were hormesis.
- Taxon
- WheatTriticum aestivumt0
- Outcome
- hormesise0
- Value
- 5.5%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“of these, 5.5% were hormesis”
t0“Wheat Seedling”
Claim · model-written summary
94.5% of nonmonotonic responses were paradoxical effects.
- Taxon
- WheatTriticum aestivumt0
- Outcome
- paradoxical effectse0
- Value
- 94.5%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“paradoxical effects comprised 94.5%”
t0“Wheat Seedling”
Claim · model-written summary
Multiphasic dependences were the most widespread paradoxical response.
- Taxon
- WheatTriticum aestivumt0
- Outcome
- type of paradoxical effecte0
- Direction
- most widespreade0
- Qualifier
- Multiphasic dependencese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Multiphasic dependences were the most widespread type of paradoxical effect.”
t0“Wheat Seedling”
Claim · model-written summary
Hormesis appeared within some multiphasic responses.
- Taxon
- WheatTriticum aestivumt0
- Outcome
- Hormesise0
- Qualifier
- some multiphasic responsese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Hormesis was a part of some multiphasic responses”
t0“Wheat Seedling”
Claim · model-written summary
Sublethal pollutants increased lipid peroxidation by 2.0–2.4 times, except manganese and glyphosate.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- Sublethal pollutant concentrationse0
- Outcome
- LPe0
- Direction
- increasede0
- Value
- 2.0-2.4 timese0
- Qualifier
- except for manganese and glyphosatee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sublethal pollutant concentrations significantly increased LP (to 2.0-2.4 times, except for manganese and glyphosate)”
t0“Wheat Seedling”
Claim · model-written summary
Sublethal pollutants reduced growth indices by 2.1–36.6 times, except glyphosate.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- Sublethal pollutant concentrationse1
- Outcome
- GPe0
- Direction
- decreasede0
- Value
- 2.1-36.6 timese0
- Qualifier
- except for glyphosatee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“decreased GP (to 2.1-36.6 times, except for glyphosate)”
t0“Wheat Seedling”
e1“Sublethal pollutant concentrations”
Claim · model-written summary
Chlorophyll and carotenoids under sublethal pollutants were variously reduced insignificantly, normalized or increased.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- Sublethal pollutant concentrationse1
- Outcome
- ChCare0
- Direction
- reduced insignificantly, normalized or even increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“while ChCar was reduced insignificantly, normalized or even increased”
t0“Wheat Seedling”
e1“Sublethal pollutant concentrations”
Claim · model-written summary
Lower pollutant concentrations caused deviations no greater than 62% in all indices.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- Lower pollutant concentrationse0
- Outcome
- all parameterse0
- Direction
- moderate deviatione0
- Value
- not more than 62%e0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Lower pollutant concentrations caused a moderate deviation in all parameters from the control (not more than 62%) for hormesis and paradoxical effects.”
t0“Wheat Seedling”
Claim · model-written summary
The same pollutant could produce different types of nonmonotonic seedling responses.
- Taxon
- WheatTriticum aestivumt0
- Outcome
- seedling parameterse0
- Qualifier
- different types of nonmonotonic responsese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The seedling parameters could have different types of nonmonotonic responses upon exposure to the same pollutant.”
t0“Wheat Seedling”
The same questions in other papers
pollution · physiology: oxidative · Triticum aestivum (wheat)Positive and negative results
1 paper in the same direction as this paper · 3 in the opposite direction
- positive
- positive
- positive
1 paper more in this group
See all 5 papers →pollution · growth · Triticum aestivum (wheat)Positive and negative results
12 papers in the same direction as this paper · 1 in the opposite direction
- positive
- negative
- no effect
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.