Studies on Biological Control of Fire Blight With Some Antagonistic Bacteria

Özaktan, Hatice; Bora, Tayyar

doi:10.17660/actahortic.2006.704.49

Cited by 7 publications

(11 citation statements)

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“…However, to date, only a few plant endophytes have been screened for the treatment of disease. Ozaktan et al 30 assayed 29 epiphytes from healthy walnut leaves against Xaj, 18 strains have antagonistic effects with inhibitory zone 3.0 to 13.0mm. Bacteria measured as around 60% antagonistic, have decreased walnut bacterial blight 41-77% on walnut seedlings.…”

Section: Discussionmentioning

confidence: 99%

“…These include the examination of medicinal plant essential oils and aqueous extracts 26 and bacteriophages isolated from walnut orchard soils in New Zealand and Chile 27,28,29 . Screening, identification, and evaluation for antagonistic bacteria led to four Pseudomonas fluorescens strains being identified as putative antagonists of Xaj and being shown to significantly reduce symptoms on walnut leaves (41% to 82%) 30 .…”

Section: Introductionmentioning

confidence: 99%

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Screening of Antagonistic Bacteria from Endophytes against Walnut Blight Pathogen Xanthomonas arboricola pv. juglandis

Fu¹,

Yu²,

Wang³

et al. 2021

J. Pure Appl. Microbiol.

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Walnut blight caused by Xanthomonas arboricola pv. juglandis (Xaj) is the most important bacterial disease in walnut production worldwide. To seek biocontrol agents against Xaj, we screened 152 endophytic bacteria isolated from 87 plants. Through dual-culture method screening, we obtained four antagonistic bacteria, ATE17, BME17, CIE17, and OFE17 which were isolated from Amaranthus tricolor, Bambusa multiplex, Canna indica, and Osmanthus fragrans plants respectively. The inhibition ratios of ATE18, BME17, CIE18, and OFE17 against Xaj on plates were 1.5, 1.6, 1.3, and 1.6, respectively. These indicated they have good biocontrol potential for walnut bacterial blight. Subsequently, the four endophytic bacteria were identified by morphology, Gram staining, Microbial Identification System (fatty acid methyl ester analysis), as well as 16S rDNA and gyrB sequencing. It turns out that all four strains were identified as Bacillus sp. Furthermore, the two strains BME17 and OFE17 can suppress multiple plant fungal pathogens and bacterial pathogens on plates.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Screening of Antagonistic Bacteria from Endophytes against Walnut Blight Pathogen Xanthomonas arboricola pv. juglandis

Fu¹,

Yu²,

Wang³

et al. 2021

J. Pure Appl. Microbiol.

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“…Our outcomes are in accordance with those of (Blessington et al 2013), who described the occurrence of S. enterica, E. coli and L. monocytogenes on walnuts during storage. Other researchers successfully isolated and identified some strains of Xanthomonas arboricola pv.juglandis in walnuts growing in areas of Turkey (Ozaktan et al 2012). Nut products have been recognized as a vector for salmonellosis.…”

Section: Discussionmentioning

confidence: 99%

Inhibition of Pathogenic Bacteria Isolated from Some Nuts Seeds by Natural and Some Commercial Coumarins

Aldayel¹

2020

SJKFU

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The antibacterial potential of a natural coumarin compound that was extracted from the root of Lotus lalambensis Schweinf and several commercial coumarin compounds (herniarin, xanthotoxin, umbelliferone and scopoletin) were investigated against five pathogenic bacteria (Staphylococcus epidermidis, Bacillus mycoides, Escherichia coli, Staphylococcus aureus and Bacillus cereus) that were isolated from different nut products. The natural coumarin showed the best antibacterial potential against the most sensitive bacteria (Staphylococcus aureus and Bacillus cereus) with a minimum inhibitory concentration of 62.5 μg ml-1. The antibacterial mechanism of different coumarin compounds was investigated by assessing the effect of coumarin on the membrane potential to quantify the alkaline phosphatase and lactate dehydrogenase activities of tested bacteria. The membrane potential of Staphylococcus aureus was higher in natural coumarin than in the control and commercial coumarin, followed by Bacillus cereus. The concentration of extracellular protein and the activity of lactate dehydrogenase and alkaline phosphtase were evaluated, and the bacteria that was treated with the natural coumarin had the highest antibacterial activity. The results showed the significant potential of coumarin in isolated DNA cleavage reactions. Our data also showed that the addition of natural coumarin and commercial coumarins resulted in a higher discharge of membrane potential in the supernatant. The conclusion revealed that the natural coumarin of Lotus lalambensis is potentially a significant source of useful molecules for the expansion of new antibacterial agents and the promising manipulation of natural coumarin to protect contaminated nuts and other foods against the pathogenic bacteria.

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“…However, there are some reports on the use of antagonistic bacteria to control X. arboricola disease on Prunus spp. (11,42) and walnut (67). Finally, although bacteriophages have been used successfully to manage several Xanthomonas diseases of annual plants (41), little progress has been made to control X. arboricola on woody plants.…”

Section: Disease Managementmentioning

confidence: 99%

Xanthomonas arboricolaDiseases of Stone Fruit, Almond, and Walnut Trees: Progress Toward Understanding and Management

Lamichhane

2014

Plant Disease

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Stone fruit (Prunus spp.: apricot, cherry, peach, nectarine, plum, and sloe), almond (Prunus spp.), and walnut (Juglans spp.) crops are among the most economically important tree crops worldwide and are cultivated to a different extent on all continents. The number of countries growing these crops has increased in the last decade with a subsequent increase in acreage globally. Throughout the range of cultivation, Prunus spp. and Juglans spp. are often subjected to pathogen attack. Among them, Xanthomonas arboricola has become markedly important over the last decade. The putative pathovars of X. arboricola, pv. pruni and pv. juglandis, cause bacterial canker and spot and bacterial blight on stone fruits and almond, and on walnut, respectively. In recent years, disease outbreaks caused by X. arboricola on Prunus and on Juglans have increased, as has international concern. The rate at which these outbreaks are occurring suggests the possibility of future epidemics. To address the consequences of such disease emergences, it is important to understand the epidemiology of these diseases, about which little is known to date. The objectives of this review are to provide an overview of X. arboricola diseases of stone fruit, almond, and walnut trees, and to discuss current and future management strategies.

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Studies on Biological Control of Fire Blight With Some Antagonistic Bacteria

Cited by 7 publications

References 0 publications

Screening of Antagonistic Bacteria from Endophytes against Walnut Blight Pathogen Xanthomonas arboricola pv. juglandis

Screening of Antagonistic Bacteria from Endophytes against Walnut Blight Pathogen Xanthomonas arboricola pv. juglandis

Inhibition of Pathogenic Bacteria Isolated from Some Nuts Seeds by Natural and Some Commercial Coumarins

Xanthomonas arboricolaDiseases of Stone Fruit, Almond, and Walnut Trees: Progress Toward Understanding and Management

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