Defense responses and oxidative metabolism of glyphosate-resistant soybean plants infected by Phakopsora pachyrhizi modulated by glyphosate and nickel

Einhardt, Andersom Milech; Oliveira, Lillian Matias de; Ferreira, S. E. S.; Araújo, Wagner L.; Medeiros, David B.; Fernie, Alisdair R.; Rodrigues, Fabrício Á.

doi:10.1016/j.pmpp.2022.101817

Cited by 6 publications

(6 citation statements)

References 54 publications

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“…Ahammed et al (2020) reported that under iron toxicity antioxidant enzymes activity were enhanced in C. sativus. The results of this study are comparable with those of Sarafi et al (2017) Ni toxicity (Einhardt et al, 2022), andValivand et al (2019) in zucchini seedlings exposed to Ni toxicity. Antioxidant enzymes scavenge ROS and other free radicals, protecting plant cell membranes from damage.…”

Section: Discussionsupporting

confidence: 84%

Physiological and Biochemical Responses of Pepper (Capsicum annuum L.) Seedlings to Nickel Toxicity

Altaf

Hao

et al. 2022

Front. Plant Sci.

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Globally, heavy metal pollution of soil has remained a problem for food security and human health, having a significant impact on crop productivity. In agricultural environments, nickel (Ni) is becoming a hazardous element. The present study was performed to characterize the toxicity symptoms of Ni in pepper seedlings exposed to different concentrations of Ni. Four-week-old pepper seedlings were grown under hydroponic conditions using seven Ni concentrations (0, 10, 20, 30, 50, 75, and 100 mg L–1 NiCl2. 6H2O). The Ni toxicity showed symptoms, such as chlorosis of young leaves. Excess Ni reduced growth and biomass production, root morphology, gas exchange elements, pigment molecules, and photosystem function. The growth tolerance index (GTI) was reduced by 88-, 75-, 60-, 45-, 30-, and 19% in plants against 10, 20, 30, 50, 75, and 100 mg L–1 Ni, respectively. Higher Ni concentrations enhanced antioxidant enzyme activity, ROS accumulation, membrane integrity [malondialdehyde (MDA) and electrolyte leakage (EL)], and metabolites (proline, soluble sugars, total phenols, and flavonoids) in pepper leaves. Furthermore, increased Ni supply enhanced the Ni content in pepper’s leaves and roots, but declined nitrogen (N), potassium (K), and phosphorus (P) levels dramatically. The translocation of Ni from root to shoot increased from 0.339 to 0.715 after being treated with 10–100 mg L–1 Ni. The uptake of Ni in roots was reported to be higher than that in shoots. Generally, all Ni levels had a detrimental impact on enzyme activity and led to cell death in pepper seedlings. However, the present investigation revealed that Ni ≥ 30 mg L–1 lead to a deleterious impact on pepper seedlings. In the future, research is needed to further explore the mechanism and gene expression involved in cell death caused by Ni toxicity in pepper plants.

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Section: Discussionsupporting

confidence: 84%

Physiological and Biochemical Responses of Pepper (Capsicum annuum L.) Seedlings to Nickel Toxicity

Altaf

Hao

et al. 2022

Front. Plant Sci.

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“…This is shown by the necrosis spots on the leaf lamina caused by this treatment. Joint action of these molecules may have stimulated ethylene production or other defenses against biotrophic pathogens 38,39 …”

Section: Discussionmentioning

confidence: 99%

“…Joint action of these molecules may have stimulated ethylene production or other defenses against biotrophic pathogens. 38,39 Concerning Gly, it is reported that its disease-inhibiting activity can occur both directly and indirectly. Gly applications in soybean are related to the accumulation of glyceollin, a phytoalexin toxic to pathogens, 40,41 and to inhibition of the enzyme 5-enolpyruvylshikimate-3-phosphate synthase (EPSPS), also present in fungi.…”

Section: Discussionmentioning

confidence: 99%

Herbicides reduce the severity and sporulation of Phakopsora pachyrhizi in soybean with triple herbicide resistance

Claus

Roncatto

Barroso

et al. 2023

Pest Management Science

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BACKGROUNDTransgenic event DAS44406‐6 (E3) makes soybeans that are herbicide [glyphosate (Gly), 2,4‐dichlorophenoxyacetic acid (2,4‐D) and glufosinate] and caterpillar resistant. The E3 soybean was commercially released for the 2021/2022 harvest in Brazil. We conducted this study to test whether Gly and 2,4‐D applied alone and in a commercial mixture affect Asian soybean rust (ASR). Assays were conducted in detached leaves and in vivo, in a controlled environment using the herbicides Gly, 2,4‐D and Gly + 2,4‐D, and pathogen inoculation. Disease severity and spore production were evaluated.RESULTSOnly the herbicides Gly and Gly + 2,4‐D inhibited ASR in detached leaves and in vivo. When applied preventively and curatively in vivo, these herbicides reduced the disease severity and spore production of the fungus. In vivo, inhibition of disease severity reached 87% for Gly + 2,4‐D and 42% for Gly. A synergistic effect was observed with the commercial Gly + 2,4‐D mixture. Application of 2,4‐D alone in the in vivo assays did not reduce or increase disease severity. Gly and Gly + 2,4‐D act residually in inhibiting the disease. Growing E3 soybeans may combine weed and caterpillar management benefits with ASR inhibition.CONCLUSIONApplication of Gly and Gly + 2,4‐D herbicides in resistant E3 soybean shows inhibitory activity for ASR. © 2023 Society of Chemical Industry.

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“…70 Einhardt et al insinuated that nickel ion and glyphosate act synergistically in reducing Asian soybean rust in GR soybean, but a more than additive effect was not proven. 71 Glyphosate applied at the V3 or V6 growth stages of GR soybean suppressed charcoal rot (Macrophomina phaseolina) in a tilled site and had no effect in a no-till site. 72 Glyphosate was fungicidal to this microbe in an in vitro assay.…”

Section: Found In Fungi That Are Not Commercial Fungicide Targetsmentioning

confidence: 98%

Molecular Targets of Herbicides and Fungicides─Are There Useful Overlaps for Fungicide Discovery?

Duke,

Pan,

Bajsa-Hirschel

et al. 2023

J. Agric. Food Chem.

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Defense responses and oxidative metabolism of glyphosate-resistant soybean plants infected by Phakopsora pachyrhizi modulated by glyphosate and nickel

Cited by 6 publications

References 54 publications

Physiological and Biochemical Responses of Pepper (Capsicum annuum L.) Seedlings to Nickel Toxicity

Physiological and Biochemical Responses of Pepper (Capsicum annuum L.) Seedlings to Nickel Toxicity

Herbicides reduce the severity and sporulation of Phakopsora pachyrhizi in soybean with triple herbicide resistance

Molecular Targets of Herbicides and Fungicides─Are There Useful Overlaps for Fungicide Discovery?

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