This preprint is under consideration at Archives of Environmental Contamination and Toxicology. A preprint is a preliminary version of a manuscript that has not completed peer review at a journal. Research Square does not conduct peer review prior to posting preprints. The posting of a preprint on this server should not be interpreted as an endorsement of its validity or suitability for dissemination as established information or for guiding clinical practice.
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Research Article
Flávio Henrique Silveira Rabêlo
Universidade de São Paulo Escola Superior de Agricultura Luiz de Queiroz
Corresponding Author
ORCiD: https://orcid.org/0000-0002-8804-7182
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This work is licensed under a CC BY 4.0 License. Read Full License
The bioaccumulation of trace elements (TEs) in crops consumed by humans can lead to a lower food production due to photosynthetic damages and several diseases in humans, but decreasing soil acidity could mitigate these problems by decreasing TEs bioavailability. Thus, we evaluate the effect of increasing soil base saturation (BS%) on photosynthesis, growth and bioaccumulation of barium (Ba), cadmium (Cd), copper (Cu), nickel (Ni) or zinc (Zn) in lettuce (Lactuca sativa L.), rice (Oryza sativa L.), sunflower (Helianthus annuus L.) and tomato (Solanum lycopersicum L.) grown in sandy Entisol. The crops were grown in uncontaminated or contaminated Entisol, under two BS% ratios: 30% for all crops or 50% for rice and 70% for lettuce, sunflower and tomato. The photosynthesis-related parameters varied depending on the metal and crop, but in general, increasing BS% did not attenuate photosynthetic damages induced by Ba, Cd, Cu, Ni and Zn in the crops. There was no strong correlation between the photosynthetic parameters measured and biomass production, which suggest us that the suppression on biomass induced by Ba, Cd, Cu, Ni or Zn is related to other metabolic disorders besides the impairment on CO2 assimilation or chlorophyll synthesis in the crops assayed, with exception of Ni and Zn in lettuce. In conclusion, increasing BS% was not consistent in decreasing Ba, Cd, Cu, Ni and Zn accumulation in the edible parts of lettuce, rice, sunflower and tomato grown in the sandy soil, which probably is related to the low capacity of this soil in control TEs bioavailability.
Keywords
Food safety, Human health, Metals translocation, Soil chemistry, Trace elements uptake
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This preprint is under consideration at Archives of Environmental Contamination and Toxicology. A preprint is a preliminary version of a manuscript that has not completed peer review at a journal. Research Square does not conduct peer review prior to posting preprints. The posting of a preprint on this server should not be interpreted as an endorsement of its validity or suitability for dissemination as established information or for guiding clinical practice.
Learn more about In Review
Research Article
Flávio Henrique Silveira Rabêlo
Universidade de São Paulo Escola Superior de Agricultura Luiz de Queiroz
Corresponding Author
ORCiD: https://orcid.org/0000-0002-8804-7182
Badges
Prescreen
This manuscript passed our Prescreen assessment
Complete author information
Appropriate declaration statements
Potential risks to human health
Prescreen
Peer Review Timeline
CURRENT STATUS: Under Review
Version 1
Posted 11 Feb, 2021
No community comments so far
Reviewers invited
Invitations sent on 13 Feb, 2021
Reviews received
Received 13 Feb, 2021
Editor assigned
On 07 Feb, 2021
First submitted
On 17 Jan, 2021
Metrics
Comments: 0
PDF Downloads: ...
HTML Views: ...
License:
This work is licensed under a CC BY 4.0 License. Read Full License
The bioaccumulation of trace elements (TEs) in crops consumed by humans can lead to a lower food production due to photosynthetic damages and several diseases in humans, but decreasing soil acidity could mitigate these problems by decreasing TEs bioavailability. Thus, we evaluate the effect of increasing soil base saturation (BS%) on photosynthesis, growth and bioaccumulation of barium (Ba), cadmium (Cd), copper (Cu), nickel (Ni) or zinc (Zn) in lettuce (Lactuca sativa L.), rice (Oryza sativa L.), sunflower (Helianthus annuus L.) and tomato (Solanum lycopersicum L.) grown in sandy Entisol. The crops were grown in uncontaminated or contaminated Entisol, under two BS% ratios: 30% for all crops or 50% for rice and 70% for lettuce, sunflower and tomato. The photosynthesis-related parameters varied depending on the metal and crop, but in general, increasing BS% did not attenuate photosynthetic damages induced by Ba, Cd, Cu, Ni and Zn in the crops. There was no strong correlation between the photosynthetic parameters measured and biomass production, which suggest us that the suppression on biomass induced by Ba, Cd, Cu, Ni or Zn is related to other metabolic disorders besides the impairment on CO2 assimilation or chlorophyll synthesis in the crops assayed, with exception of Ni and Zn in lettuce. In conclusion, increasing BS% was not consistent in decreasing Ba, Cd, Cu, Ni and Zn accumulation in the edible parts of lettuce, rice, sunflower and tomato grown in the sandy soil, which probably is related to the low capacity of this soil in control TEs bioavailability.
Figure 1
Figure 2
Figure 3
Figure 4
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