Evidence map›Paper›PMID 36978914›Full record

ReviewAntioxidants (Basel, Switzerland)2023

Accumulation of Proline in Plants under Contaminated Soils-Are We on the Same Page?

Sofia Spormann, Pedro Nadais, Filipa Sousa, Mafalda Pinto, Maria Martins, Bruno Sousa, Fernanda Fidalgo, Cristiano Soares

Open access · goldFull text readReview
In one paragraph

Review in Antioxidants (Basel, Switzerland), 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 46 papers.

0numbers the graph read from it
0cells of the map it votes in
46citing papers in PubMed
59.6field-weighted citation impact, top 1% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

46 citing papers in PubMed, 150 citations in OpenAlex.

  1. Integrated nutrient and plant growth regulator management improves cadmium phytoextraction in Ricinus communis.Biometals : an international journal on the role of metal ions in biology, biochemistry, and medicine · 2026
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  10. Exogenous nitrogen mitigation of cadmium stress inFrontiers in plant science · 2026
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  18. Effect of Nickel Stress on Nitrogen Metabolism in Cucumber Plants.International journal of molecular sciences · 2025
    Article
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  20. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

8 authors at 1 institution in 1 country.

Sofia SpormannGreenUPorto-Sustainable Agrifood Production Research Centre & Inov4Agro, Faculty of Sciences, University of Porto, Rua do Campo Alegre s/n, 4169-007 Porto, Portugal.
Pedro NadaisBiology Department, Faculty of Sciences, University of Porto, Rua do Campo Alegre s/n, 4169-007 Porto, Portugal.
Filipa SousaGreenUPorto-Sustainable Agrifood Production Research Centre & Inov4Agro, Faculty of Sciences, University of Porto, Rua do Campo Alegre s/n, 4169-007 Porto, Portugal.
Mafalda PintoGreenUPorto-Sustainable Agrifood Production Research Centre & Inov4Agro, Faculty of Sciences, University of Porto, Rua do Campo Alegre s/n, 4169-007 Porto, Portugal.
Maria MartinsGreenUPorto-Sustainable Agrifood Production Research Centre & Inov4Agro, Faculty of Sciences, University of Porto, Rua do Campo Alegre s/n, 4169-007 Porto, Portugal.ORCID 0000-0001-8262-1393
Bruno SousaGreenUPorto-Sustainable Agrifood Production Research Centre & Inov4Agro, Faculty of Sciences, University of Porto, Rua do Campo Alegre s/n, 4169-007 Porto, Portugal.ORCID 0000-0002-4450-3596
Fernanda FidalgoGreenUPorto-Sustainable Agrifood Production Research Centre & Inov4Agro, Faculty of Sciences, University of Porto, Rua do Campo Alegre s/n, 4169-007 Porto, Portugal.ORCID 0000-0001-7756-5243
Cristiano SoaresGreenUPorto-Sustainable Agrifood Production Research Centre & Inov4Agro, Faculty of Sciences, University of Porto, Rua do Campo Alegre s/n, 4169-007 Porto, Portugal.ORCID 0000-0003-3330-2024
Universidade do Porto · PT

Funding

Fundação La Caixa / BPI PD21-00007Fundação para a Ciência e Tecnologia 2020/07826/BDFundação para a Ciência e Tecnologia 2021.04941.BDFundação para a Ciência e Tecnologia 2021.07342.BDFundação para a Ciência e Tecnologia 2021.07825.BDFundação para a Ciência e Tecnologia PCIF/GVB/0150/2018Fundação para a Ciência e Tecnologia SFRH/BD/143268/2019Fundação para a Ciência e Tecnologia UIDB/05748/2020Fundação para a Ciência e Tecnologia UIDP/05748/2020
6 · The paper itself

Abstract

Agricultural soil degradation is occurring at unprecedented rates, not only as an indirect effect of climate change (CC) but also due to intensified agricultural practices which affect soil properties and biodiversity. Therefore, understanding the impacts of CC and soil degradation on plant physiology is crucial for the sustainable development of mitigation strategies to prevent crop productivity losses. The amino acid proline has long been recognized for playing distinct roles in plant cells undergoing osmotic stress. Due to its osmoprotectant and redox-buffering ability, a positive correlation between proline accumulation and plants' tolerance to abiotic stress has been pointed out in numerous reviews. Indeed, proline quantification is used systematically by plant physiologists as an indicator of the degree of tolerance and a measurement of the antioxidant potential in plants under stressful conditions. Moreover, the exogenous application of proline has been shown to increase resilience to several stress factors, including those related to soil degradation such as salinity and exposure to metals and xenobiotics. However, recent data from several studies often refer to proline accumulation as a signal of stress sensitivity with no clear correlation with improved antioxidant activity or higher stress tolerance, including when proline is used exogenously as a stress reliever. Nevertheless, endogenous proline levels are strongly modified by these stresses, proving its involvement in plant responses. Hence, one main question arises-is proline augmentation always a sign of improved stress resilience? From this perspective, the present review aims to provide a more comprehensive understanding of the implications of proline accumulation in plants under abiotic stress induced by soil degradation factors, reinforcing the idea that proline quantification should not be employed as a sole indicator of stress sensitivity or resilience but rather complemented with further biochemical and physiological endpoints.

Indexed as

abiotic stressantioxidantsmetalsoxidative stressredox homeostasissalinitysoil erosionxenobiotics

Identifiers

PMID36978914
PMCPMC10045403
OpenAlexW4323569687

What OpenQuestion holds

Textfull text, public
LicenceCC BY
measurements read3
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.