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Keywords = Xanthomonas hortorum pv. gardneri

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8 pages, 1557 KiB  
Article
Screening Wild Pepper Germplasm for Resistance to Xanthomonas hortorum pv. gardneri
by Zoltán Gábor Tóth, Máté Tóth, Sándor Fekete, Zoltán Szabó and Zoltán Tóth
Sustainability 2023, 15(2), 908; https://doi.org/10.3390/su15020908 - 4 Jan 2023
Cited by 3 | Viewed by 2587
Abstract
Bacterial spot disease on peppers is caused by four species of the genus Xanthomonas. This disease causes black spot lesions not only on the leaves but also on the fruit, leading to yield and quality loss. Xanthomonas species cause major disease outbreaks [...] Read more.
Bacterial spot disease on peppers is caused by four species of the genus Xanthomonas. This disease causes black spot lesions not only on the leaves but also on the fruit, leading to yield and quality loss. Xanthomonas species cause major disease outbreaks in tropical, subtropical and humid continental regions worldwide. Bacterial blight caused by xanthomonads occurs on both greenhouse- and field-grown peppers and is particularly important in areas characterized by hot and humid environmental conditions. As pesticides are currently not sufficiently effective in the control of bacterial spot, the development of pepper varieties resistant to Xanthomonas species, including X. hortorum pv. gardneri, is of primary importance for sustainable production. In our research, 119 lines of Capsicum baccatum from the USDA ARS gene bank (Griffin, GA) and MATE (Hungarian University of Agriculture and Life Sciences) were tested against strains of X. hortorum pv. gardneri under greenhouse conditions. Four accessions of the wild pepper species C. baccatum appeared to be resistant to seven strains of X. hortorum pv. gardneri in greenhouse trials. The resistant genotypes of X. hortorum pv. gardneri identified in this study can be used for the resistance gene pyramidation against different bacterial spotted Xanthomonas species in pepper. Full article
(This article belongs to the Special Issue Plant Breeding Supporting the Sustainable Field Crop Production)
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19 pages, 3321 KiB  
Review
A Pan-Global Study of Bacterial Leaf Spot of Chilli Caused by Xanthomonas spp.
by Desi Utami, Sarah Jade Meale and Anthony Joseph Young
Plants 2022, 11(17), 2291; https://doi.org/10.3390/plants11172291 - 1 Sep 2022
Cited by 14 | Viewed by 7871
Abstract
Bacterial Leaf Spot (BLS) is a serious bacterial disease of chilli (Capsicum spp.) caused by at least four different Xanthomonas biotypes: X. euvesicatoria pv. euvesicatoria, X. euvesicatoria pv. perforans, X. hortorum pv. gardneri, and X. vesicatoria. Symptoms include [...] Read more.
Bacterial Leaf Spot (BLS) is a serious bacterial disease of chilli (Capsicum spp.) caused by at least four different Xanthomonas biotypes: X. euvesicatoria pv. euvesicatoria, X. euvesicatoria pv. perforans, X. hortorum pv. gardneri, and X. vesicatoria. Symptoms include black lesions and yellow halos on the leaves and fruits, resulting in reports of up to 66% losses due to unsalable and damaged fruits. BLS pathogens are widely distributed in tropical and subtropical regions. Xanthomonas is able to survive in seeds and crop residues for short periods, leading to the infections in subsequent crops. The pathogen can be detected using several techniques, but largely via a combination of traditional and molecular approaches. Conventional detection is based on microscopic and culture observations, while a suite of Polymerase Chain Reaction (PCR) and Loop-Mediated Isothermal Amplification (LAMP) assays are available. Management of BLS is challenging due to the broad genetic diversity of the pathogens, a lack of resilient host resistance, and poor efficacy of chemical control. Some biological control agents have been reported, including bacteriophage deployment. Incorporating stable host resistance is a critical component in ongoing integrated management for BLS. This paper reviews the current status of BLS of chilli, including its distribution, pathogen profiles, diagnostic options, disease management, and the pursuit of plant resistance. Full article
(This article belongs to the Special Issue Detection and Diagnostics of Bacterial Plant Pathogens)
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