Characterization of Xanthomonas spp. strains by bacteriocins

Bonini, Marcel; Maringoni, Antônio Carlos; Neto, J. Rodrigues

doi:10.1590/s0100-54052007000100003

Summa phytopathol.

2007

DOI: 10.1590/s0100-54052007000100003

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Characterization of Xanthomonas spp. strains by bacteriocins

Marcel Bonini

Antônio Carlos Maringoni

J. Rodrigues Neto

Abstract: Twenty-five strains of Xanthomonas axonopodis pv. citri and 14 strains of Xanthomonas spp. were tested for bacteriocin production. X. axonopodis pv. passiflorae strains were sensitive to the bacteriocins produced by the 25 X. axonopodis pv. citri strains evaluated in this study while strains of X. axonopodis pv. manihotis and X. campestris pv. campestris showed variable sensitivity. Only five of the 25 X. axonopodis pv. citri strains were not inhibited by the bacteriocins produced by the two X. axonopodis pv. … Show more

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Cited by 3 publications

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The role of stress in colicin regulation

Ghazaryan¹,

Tonoyan²,

Al-Ashhab³

et al. 2014

Arch Microbiol

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Bacteriocins produced by Enterobacteriaceae are high molecular weight toxic proteins that kill target cells through a variety of mechanisms, including pore formation and nucleic acid degradation. What is remarkable about these toxins is that their expression results in death to the producing cells and therefore bacteriocin induction have to be tightly regulated, often confined to times of stress. Information on the regulation of bacteriocins produced by enteric bacteria is sketchy as their expression has only been elucidated in a handful of bacteria. Here, we review the known regulatory mechanisms of enteric bacteriocins and explore the expression of 12 of them in response to various triggers: DNA-damaging agents, stringent response, catabolite repression, oxidative stress, growth phase, osmolarity, cold shock, nutrient deprivation, anaerobiosis and pH stress. Our results indicate that the expression of bacteriocins is mostly confined to mutagenic triggers, while all other triggers tested are limited inducers.

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The role of stress in colicin regulation

Ghazaryan¹,

Tonoyan²,

Al-Ashhab³

et al. 2014

Arch Microbiol

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show abstract

Produção e sensibilidade de isolados brasileiros de Xanthomonas axonopodis pv. citri à bacteriocinas

2012

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The aim of this study was to evaluate the production and sensitivity of 48 Brazilian isolates of X. axonopodis pv. citri (Xac) to bacteriocins. v.38, n.3, p.232-234, 2012. Pelos resultados obtidos, nenhum isolado de Xac foi sensível às bacteriocinas produzidas pelos isolados bacterianos avaliados.Based on the obtained results, no isolate of Xac was sensitive to the bacteriocins produced by the evaluated bacterial isolates.

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The current status, challenges, and future perspectives for managing diseases of brassicas

et al. 2023

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The Brassica genus comprises the greatest diversity of agriculturally important crops. Several species from this genus are grown as vegetable and oil crops for food, animal feed and industrial purposes. In particular, B. oleracea has been extensively bred to give rise to several familiar vegetables (cabbage, broccoli, cauliflower, kale and Brussels Sprouts, etc.) that are grouped under seven major cultivars. In 2020, 96.4 million tonnes of vegetable brassicas were produced globally with a 10.6% increase over the past decade. Yet, like other crops, the production of brassicas is challenged by diseases among which, black rot, clubroot, downy mildew and turnip yellows virus have been identified by growers as the most damaging to UK production. In some cases, yield losses can reach 90% depending upon the geographic location of cultivation. This review aims to provide an overview of the key diseases of brassicas and their management practices, with respect to the biology and lifecycle of the causal pathogens. In addition, the existing controls on the market as well as those that are currently in the research and development phases were critically reviewed. There is not one specific control method that is effective against all the diseases. Generally, cultural practices prevent disease rather than reduce or eliminate disease. Chemical controls are limited, have broad-spectrum activity, are damaging to the environment and are rapidly becoming ineffective due to the evolution of resistance mechanisms by the pathogens. It is therefore important to develop integrated pest management (IPM) strategies that are tailored to geographic locations. Several knowledge gaps have been identified and listed in this review along with the future recommendations to control these four major diseases of brassicas. As such, this review paper will act as a guide to sustainably tackle pre-harvest diseases in Brassica crops to reduce food loss.

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Characterization of Xanthomonas spp. strains by bacteriocins

Cited by 3 publications

References 15 publications

The role of stress in colicin regulation

The role of stress in colicin regulation

Produção e sensibilidade de isolados brasileiros de Xanthomonas axonopodis pv. citri à bacteriocinas

The current status, challenges, and future perspectives for managing diseases of brassicas

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