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Effects of elevated CO2 concentration and temperature on the mixed-culture grown wild mustard (Sinapis arvensis L.) response to auxin herbicide

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Abstract

Recently, there has been growing concern over the potential impact of CO2 concentration and temperature on herbicide efficacy. The aim of the study was to examine the influence of single elevated CO2 (400 vs. 800 ppm) and elevated CO2 in combination with temperature (21 °C vs. 25 °C) on the effects of auxin herbicide 4-chloro-2-methylphenoxyacetic acid (MCPA) (0.5–2 × field recommended rate) to wild mustard (Sinapis arvensis L.) grown in mixed-culture with spring barley (Hordeum vulgare L.). MCPA had a detrimental effect on aboveground and belowground biomass, content of chlorophylls, enzymatic and non-enzymatic antioxidants and induced oxidative stress. The significant decline in photosynthetic rate, stomatal conductance and transpiration with MCPA dose was detected. Elevated CO2 reinforced MCPA efficacy on S. arvensis: sharper decline in biomass, photosynthetic rate and antioxidant enzymes and more pronounced lipid peroxidation were detected. Under elevated CO2 and temperature, MCPA efficacy to control S. arvensis dropped due to herbicide dilution because of increased root:shoot ratio, higher activity of antioxidants and less pronounced oxidative damage. Reinforced MCPA impact on weeds under elevated CO2 resulted in higher H. vulgare biomass, while decreased MCPA efficacy under elevated CO2 and temperature reduced H. vulgare biomass.

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The datasets used and/or analysed during the current study are available from the corresponding author on reasonable request.

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Acknowledgements

This research is a part of a project “The integrated impact of climate and environmental changes on agroecosystems productivity, biodiversity and stability” no. SIT-8/2015 and was supported by the Research Council of Lithuania. We would like also to thank H. AbdElgawad and H. Asard (University of Antwerp) for their help during chemical analysis.

Funding

This research is a part of a project “The integrated impact of climate and environmental changes on agroecosystems productivity, biodiversity and stability” no. SIT-8/2015 and was supported by the Research Council of Lithuania.

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All authors contributed to the study conception and design. Material preparation, data collection and analysis were performed by Jūratė Žaltauskaitė, Austra Dikšaitytė, Diana Miškelytė, Giedrė Kacienė, Gintarė Sujetovienė and Irena Januškaitienė. The first draft of the manuscript was written by Jūratė Žaltauskaitė and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.

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Correspondence to Jūratė Žaltauskaitė.

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Žaltauskaitė, J., Dikšaitytė, A., Miškelytė, D. et al. Effects of elevated CO2 concentration and temperature on the mixed-culture grown wild mustard (Sinapis arvensis L.) response to auxin herbicide. Environ Sci Pollut Res 30, 13711–13725 (2023). https://doi.org/10.1007/s11356-022-23134-1

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  • DOI: https://doi.org/10.1007/s11356-022-23134-1

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