Clethodim (herbicide) alters the growth and toxins content of Microcystis aeruginosa and Raphidiopsis raciborskii

Brêda-Alves, Fernanda; Militão, Frederico Pacheco; Alvarenga, Brener Freitas de; Miranda, Pamela Ferreira; Fernandes, Valéria de Oliveira; Cordeiro‐Araújo, Micheline Kézia; Chia, Mathias Ahii

doi:10.1016/j.chemosphere.2019.125318

Cited by 16 publications

(6 citation statements)

References 68 publications

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“…In addition, the results of Breda-Alves et al also demonstrated that clethodim (400 mg/L) treatment increased the activities of SOD and POD, with the H 2 O 2 levels being concentration-dependent. POD is directly involved in the conversion of H 2 O 2 to H 2 O and O 2 , which may explain why its content dramatically elevated in R. raciborskii when the herbicide was applied at high concentrations . Similarly, according to Xie et al, both napropamide and acetochlor treatment boosted the activities of SOD, POD, CAT, and MDA in Echinochloa crus-galli tissues compared with controls (roots and shoots) .…”

Section: Discussionmentioning

confidence: 89%

“…POD is directly involved in the conversion of H 2 O 2 to H 2 O and O 2 , which may explain why its content dramatically elevated in R. raciborskii when the herbicide was applied at high concentrations. 39 Similarly, according to Xie et al, both napropamide and acetochlor treatment boosted the activities of SOD, POD, CAT, and MDA in Echinochloa crus-galli tissues compared with controls (roots and shoots). 40 Flavonoids and phenolic acids may protect cells against pesticide damage through their antioxidant, antiapoptotic, and antistress properties as well as through their effects on xenobiotic excretion, hormone modulation, and the regulation of lipid and energy metabolism.…”

Section: ■ Discussionmentioning

confidence: 99%

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Bensulfuron-Methyl, Terbutylazine, and 2,4-D Butylate Disturb Plant Growth and Resistance by Deteriorating Rhizosphere Environment and Plant Secondary Metabolism in Wheat Seedlings

Zhou

Cheng

et al. 2022

J. Agric. Food Chem.

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Frequent and improper use of herbicides disrupts a plant's metabolism, causing oxidative stress that degrades crop quality. However, few studies have examined the inhibitory effects of herbicides on plant growth and defense mechanisms in terms of their impact on soil quality and crop rhizosphere. Therefore, the current study investigated the detrimental impacts of six typical and multilevel herbicides on the microbial community and signal molecules in the soil as well as on the levels of hormones and secondary metabolites in wheat seedlings. Interestingly, bensulfuron-methyl, terbutylazine (TBA), and 2,4-D butylate significantly induced oxidative damage while reducing the number of phytohormones (salicylic acid and jasmonic acid) and secondary metabolites (tricin, quercetin, and caffeic acid) in the roots and leaves compared with the controls, isoproturon, fenoxaprop-p-ethyl, and pretilachlor. At twice the recommended levels (2×), they also decreased the microbial α diversity and, in particular, the abundance of Gammaproteobacteria, Alphaproteobacteria, Actinobacteria, Bacteroidia, Verrucomicrobia, Bacilli, Acidimicrobiia, Deltaproteobacteria, and Gemmatimonadetes by disrupting the level of enzymes (e.g., urease and sucrase) and metabolites (indole-3-acetic acid, salicylic acid, apigenin, 4-hydroxybenzoic acid, DIMBOA, and melatonin) in the rhizosphere soil. Overall, significant exposure to herbicides may inhibit wheat growth by disturbing the microbial composition in the rhizosphere soil and the distribution of secondary metabolites in wheat seedlings.

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Section: Discussionmentioning

confidence: 89%

Section: ■ Discussionmentioning

confidence: 99%

Bensulfuron-Methyl, Terbutylazine, and 2,4-D Butylate Disturb Plant Growth and Resistance by Deteriorating Rhizosphere Environment and Plant Secondary Metabolism in Wheat Seedlings

Zhou

Cheng

et al. 2022

J. Agric. Food Chem.

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“…Herbicides in surface runoff from agricultural landscapes alter the physical and chemical conditions of aquatic ecosystems and change the community structure and dynamics of phytoplankton. Herbicides constitute about 47% of the global agrochemical market; among them, glyphosate-based herbicides (GBH) are the most widely used herbicides worldwide. − The presence of herbicides can facilitate , or inhibit , the production and release of cyanotoxins by cyanobacteria. , Although some evidence exists that herbicides change the phytoplankton community structure and affect the growth of cyanobacteria toward the formation of harmful cyanobacterial blooms (cyanoHABs), there is still a lot that remains to be done to fully understand their effects . Obviously, blooms of cyanobacteria are a great threat to freshwater quality and global water security. , There is now a considerable amount of research addressing the mechanism of cyanobacterial blooms, although the interactive effects of these driving factors and cyanobacterial blooms are still not clear. , …”

Section: Introductionmentioning

confidence: 99%

“…45−47 The presence of herbicides can facilitate 11,22 or inhibit 8,48 the production and release of cyanotoxins by cyanobacteria. 48,49 Although some evidence exists that herbicides change the phytoplankton community structure and affect the growth of cyanobacteria toward the formation of harmful cyanobacterial blooms (cyanoHABs), there is still a lot that remains to be done to fully understand their effects. 10 Obviously, blooms of cyanobacteria are a great threat to freshwater quality and global water security.…”

Section: ■ Introductionmentioning

confidence: 99%

Chemodiversity of Cyanobacterial Toxins Driven by Future Scenarios of Climate Warming and Eutrophication

Yang

Wang

Yan

et al. 2023

Environ. Sci. Technol.

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Climate change and eutrophication are two environmental threats that can alter the structure of freshwater ecosystems and their service functions, but we know little about how ecosystem structure and function will evolve in future scenarios of climate warming. Therefore, we created different experimental climate scenarios, including present-day conditions, a 3.0 °C increase in mean temperature, and a "heatwaves" scenario (i.e., an increase in temperature variability) to assess the effects of climate change on phytoplankton communities under simultaneous stress from eutrophication and herbicides. We show that the effects of climate warming, particularly heatwaves, are associated with elevated cyanobacterial abundances and toxin production, driven by a change from mainly nontoxic to toxic Microcystis spp. The reason for higher cyanobacterial toxin concentrations is likely an increase in abundances because under the dual pressures of climate warming and eutrophication individual Microcystis toxin-producing ability decreased. Eutrophication and higher temperatures significantly increased the biomass of Microcystis, leading to an increase in the cyanobacterial toxin concentrations. In contrast, warming alone did not produce higher cyanobacterial abundances or cyanobacterial toxin concentrations likely due to the depletion of the available nutrient pool. Similarly, the herbicide glyphosate alone did not affect abundances of any phytoplankton taxa. In the case of nutrient enrichment, cyanobacterial toxin concentrations were much higher than under warming alone due to a strong boost in biomass of potential cyanobacterial toxin producers. From a broader perspective our study shows that in a future warmer climate, nutrient loading has to be reduced if toxic cyanobacterial dominance is to be controlled.

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“…The interaction of weeds with other biological components is; it can damage nearby crops [4]. Due to this reason, weed containing herbicide residuals can cause the accumulation of off-flavour products [5], or in some cases, making them harmful to humans and animal health when they enter the food chain [6]. If consumed, the detrimental health ingredients could cause hepatic failure in humans and farm animals [7].…”

Section: Introductionmentioning

confidence: 99%

How Can Unmanned Aerial Vehicles Be Used for Detecting Weeds in Agricultural Fields?

et al. 2021

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Weeds are among the most harmful abiotic factors in agriculture, triggering significant yield loss worldwide. Remote sensing can detect and map the presence of weeds in various spectral, spatial, and temporal resolutions. This review aims to show the current and future trends of UAV applications in weed detection in the crop field. This study systematically searched the original articles published from 1 January 2016 to 18 June 2021 in the databases of Scopus, ScienceDirect, Commonwealth Agricultural Bureaux (CAB) Direct, and Web of Science (WoS) using Boolean string: “weed” AND “Unmanned Aerial Vehicle” OR “UAV” OR “drone”. Out of the papers identified, 144 eligible studies did meet our inclusion criteria and were evaluated. Most of the studies (i.e., 27.42%) on weed detection were carried out during the seedling stage of the growing cycle for the crop. Most of the weed images were captured using red, green, and blue (RGB) camera, i.e., 48.28% and main classification algorithm was machine learning techniques, i.e., 47.90%. This review initially highlighted articles from the literature that includes the crops’ typical phenology stage, reference data, type of sensor/camera, classification methods, and current UAV applications in detecting and mapping weed for different types of crop. This study then provides an overview of the advantages and disadvantages of each sensor and algorithm and tries to identify research gaps by providing a brief outlook at the potential areas of research concerning the benefit of this technology in agricultural industries. Integrated weed management, coupled with UAV application improves weed monitoring in a more efficient and environmentally-friendly way. Overall, this review demonstrates the scientific information required to achieve sustainable weed management, so as to implement UAV platform in the real agricultural contexts.

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Clethodim (herbicide) alters the growth and toxins content of Microcystis aeruginosa and Raphidiopsis raciborskii

Cited by 16 publications

References 68 publications

Bensulfuron-Methyl, Terbutylazine, and 2,4-D Butylate Disturb Plant Growth and Resistance by Deteriorating Rhizosphere Environment and Plant Secondary Metabolism in Wheat Seedlings

Bensulfuron-Methyl, Terbutylazine, and 2,4-D Butylate Disturb Plant Growth and Resistance by Deteriorating Rhizosphere Environment and Plant Secondary Metabolism in Wheat Seedlings

Chemodiversity of Cyanobacterial Toxins Driven by Future Scenarios of Climate Warming and Eutrophication

How Can Unmanned Aerial Vehicles Be Used for Detecting Weeds in Agricultural Fields?

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