Effect of Thymus vulgaris essential oil on soybeans seeds infected with Pseudomonas syringae

Sotelo, Jesica P.; Oddino, Claudio; Giordano, Damián Francisco; Carezzano, María Evangelina; Oliva, María de Las Mercedes

doi:10.1016/j.pmpp.2021.101735

Cited by 14 publications

(9 citation statements)

References 19 publications

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“…These data confirmed previous results obtained for Psg and Cff. In particular, the work [ 38 ] reported on the in vivo use of thyme EO for the control of Psg seed infection and showed that when treated with this substance, the number of bacteria on seeds decreased by 6%, and germination increased by 21%. The results for Cff are also consistent with those of Flores et al [ 52 ], in which EOs of oregano, thyme, and cinnamon were tested against Clavibacter michiganensis subsp.…”

Section: Discussionmentioning

confidence: 99%

“…There are several reports on the determination of the antibacterial activity of EOs and PEs in vitro against Psg [ 6 ], Cff [ 34 , 35 ], and both bacteria simultaneously [ 36 , 37 ]. A single in vivo study of the control of Psg soybean seed infection has been reported [ 38 ], while no experiments on Cff infection in soybean have been performed to date. The purpose of this study is to screen the in vitro activity of EOs and PEs against soybean bacterial pathogens and evaluate the effectiveness of these substances against an artificial infection on plants.…”

Section: Introductionmentioning

confidence: 99%

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Using of Essential Oils and Plant Extracts against Pseudomonas savastanoi pv. glycinea and Curtobacterium flaccumfaciens pv. flaccumfaciens on Soybean

Tarakanov

Dzhalilov

2022

Plants

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The bacteria Pseudomonas savastanoi pv. glycinea (Coerper, 1919; Gardan et al., 1992) (Psg) and Curtobacterium flaccumfaciens pv. flaccumfaciens (Hedges 1922) (Cff) are harmful pathogens of soybean (Glycine max). Presently, there are several strategies to control these bacteria, and the usage of environmentally friendly approaches is encouraged. In this work, purified essential oils (EOs) from 19 plant species and total aqueous and ethanolic plant extracts (PEs) from 19 plant species were tested in vitro to observe their antimicrobial activity against Psg and Cff (by agar diffusion and broth microdilution method). Tested EOs and PEs produced significant bacterial growth inhibition with technologically acceptable MIC and MBC values. Non-phytotoxic concentrations for Chinese cinnamon and Oregano essential oils and leather bergenia ethanolic extract, which previously showed the lowest MBC values, were determined. Testing of these substances with artificial infection of soybean plants has shown that the essential oils of Chinese cinnamon and oregano have the maximum efficiency against Psg and Cff. Treatment of leaves and seeds previously infected with phytopathogens with these essential oils showed that the biological effectiveness of leaf treatments was 80.6–77.5% and 86.9–54.6%, respectively, for Psg and Cff. GC-MS and GC-FID analyzes showed that the major compounds were 5-Methyl-3-methylenedihydro-2(3H)-furanone (20.32%) in leather bergenia ethanolic extract, cinnamaldehyde (84.25%) in Chinese cinnamon essential oil and carvacrol (62.32%) in oregano essential oil.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Using of Essential Oils and Plant Extracts against Pseudomonas savastanoi pv. glycinea and Curtobacterium flaccumfaciens pv. flaccumfaciens on Soybean

Tarakanov

Dzhalilov

2022

Plants

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“…The previously extracted and analyzed essential oils of thyme and oregano were utilized in this study. Thyme Essential Oil (TEO) is comprised primarily of p-cymene (25.99%), carvacrol (20.74%), and γterpinene (11.32%) (Sotelo et al, 2021). Oregano Essential Oil (OEO) consists predominantly of cissabinene hydrate (20.99%), followed by thymol (12.03%), carvacrol (11.39%), terpinene-4-ol (10.31%), and γ-terpinene (9.22%) (Sotelo et al, 2023).…”

Section: Essentials Oilsmentioning

confidence: 99%

Effect of applications of oregano and thyme essential oils in Glycine max seeds against bacterial blight caused by Pseudomonas savastanoi

Sotelo,

Carezzano,

Rovey

et al. 2024

Preprint

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Pseudomonas savastanoi is the causal agent of bacterial blight in Glycine max. One of the routes of transmission of this pathogen is through seeds. Therefore, treating seeds with compounds that reduce bacterial proliferation represents an appealing solution to prevent production losses. Currently, studies focus on the search for natural products derived from aromatic plants with antimicrobial properties as effective and environmentally prudent alternatives. This study aims to further investigate the efficacy of oregano and thyme essential oils in treating seeds against this pathogen. In a previous study, greenhouse trials were conducted using thyme oil. In this research, greenhouse trials were performed using oregano essential oil, and field trials were conducted for both oils. In both oils, a non-phytotoxic concentration of 0.89 mg/ml for oregano essential oil and 1.76 mg/ml for thyme essential oil was determined. Both essential oils reduced the incidence and severity of the disease and the number of cells in the seeds, showing that thyme oil has a better effect than oregano under controlled conditions and in the field. The results obtained in this study demonstrate the efficiency of natural products in reducing pathogenic bacteria in seeds, representing a new natural alternative to control these microorganisms.

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“…Plants themselves produce secondary metabolites that can have antifungal and antimicrobial activity [ 111 , 112 , 113 ]. For this reason, plant extracts and essential oils are being studied as a natural solution to phytopathogenic disease.…”

Section: Disease Managementmentioning

confidence: 99%

Ascochyta Blight in Chickpea: An Update

Foresto

Carezzano

Giordano

et al. 2023

JoF

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Chickpea (Cicer arietinum L.), one of the most cultivated legumes worldwide, is crucial for the economy of several countries and a valuable source of nutrients. Yields may be severely affected by Ascochyta blight, a disease caused by the fungus Ascochyta rabiei. Molecular and pathological studies have not yet managed to establish its pathogenesis, since it is highly variable. Similarly, much remains to be elucidated about plant defense mechanisms against the pathogen. Further knowledge of these two aspects is fundamental for the development of tools and strategies to protect the crop. This review summarizes up-to-date information on the disease’s pathogenesis, symptomatology, and geographical distribution, as well as on the environmental factors that favor infection, host defense mechanisms, and resistant chickpea genotypes. It also outlines existing practices for integrated blight management.

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Effect of Thymus vulgaris essential oil on soybeans seeds infected with Pseudomonas syringae

Cited by 14 publications

References 19 publications

Using of Essential Oils and Plant Extracts against Pseudomonas savastanoi pv. glycinea and Curtobacterium flaccumfaciens pv. flaccumfaciens on Soybean

Using of Essential Oils and Plant Extracts against Pseudomonas savastanoi pv. glycinea and Curtobacterium flaccumfaciens pv. flaccumfaciens on Soybean

Effect of applications of oregano and thyme essential oils in Glycine max seeds against bacterial blight caused by Pseudomonas savastanoi

Ascochyta Blight in Chickpea: An Update

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