Occurrence of pesticides in wastewater: Bioremediation approach for environmental safety and its toxicity

Jesus, Roberta Anjos de; Barros, Gabriela Pereira; Bharagava, Ram Naresh; Liu, Jiayang; Mulla, Sikandar I.; Bilal, Muhammad; Azevedo, Lucas Carvalho Basilio; Ferreira, Luiz Fernando Romanholo

doi:10.1016/bs.apmp.2022.10.002

Cited by 3 publications

(1 citation statement)

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“…Its foliar absorption is rapid, compromising the synthesis of chlorophyll and carotenoids [ 7 ]. We know that the continuous use of pesticides in agriculture occurs with the aim of improving the quality of food products and reducing the number of plant diseases, but the occurrence of pesticides in wastewater and atmospheric currents worries the scientific community since these pollutants have harmful effects and are persistent, undergoing bioaccumulation resulting in risks to human health and environmental damage due to their toxicity [ 15 , 16 ]. In sensitive plants, glyphosate induces irreversible cellular damage that includes chloroplast rupture, cell plasmolysis, hyperplasia, cell proliferation, wax layer removal, and cuticle disruption, resulting in cell collapse and necrosis [ 17 ].…”

Section: Introductionmentioning

confidence: 99%

Hormetic Effect Caused by Sublethal Doses of Glyphosate on Toona ciliata M. Roem

de Faria,

Carlos,

Jakelaitis

et al. 2023

Plants

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This study aimed to evaluate the response of Toona ciliata seedlings to sublethal doses of glyphosate. The increasing use of glyphosate in agriculture concerns the scientific community, as the drift of this pollutant into aquatic systems or atmospheric currents can affect non-target species. Therefore, we need to understand how non-target species respond to small doses of this herbicide. T. ciliata seedlings (clone BV-1110) were exposed to sublethal doses of glyphosate (0, 9.6, 19.2, 38.4, 76.8 g ae ha−1). Anatomical, physiological, and photochemical analyses were performed 60 days after herbicide application, and growth assessments were carried out after 160 days of cultivation. We found that sublethal doses of glyphosate above 19.2 g ae ha−1 induced toxicity symptoms in Toona ciliata leaves. These symptoms were mild in some cases, such as chlorosis, but severe in other cases, such as tissue necrosis. We observed a positive relationship between increased plant height and photochemical yield with plant exposure to sub-doses 9.6 and 19.2 g ae ha−1. A sublethal dose of 38.4 g ae ha−1 improved the photosynthetic rate and carboxylation efficiency. Thus, we confirmed the hypothesis of a hormetic effect when T. ciliata was exposed to sub-doses of glyphosate equal to or lower than 38.4 g ae ha−1. However, the sublethal dose of 76.8 g ae ha−1 must be considered toxic, impacting photosynthetic activity and, consequently, the height of T. ciliata. The stem diameter of T. ciliata responded positively to increasing glyphosate doses. This occurs to compensate for the negative effect of glyphosate on water absorption. Further research will provide valuable information for harnessing the potential benefits of hormesis to improve the productivity of T. ciliata.

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Section: Introductionmentioning

confidence: 99%