Following a request from the European Commission, the European Food Safety Authority (EFSA) Plant Health (PLH) Panel analysed a dossier submitted by the Japanese authorities in order to clarify the host status of with regard to pv. and pv. , causal agents of citrus bacterial canker, and to indicate whether fruit could represent a pathway for the introduction of citrus bacterial canker into the European Union. In a previous opinion in the year 2014, the EFSA PLH Panel concluded that commercial fresh citrus fruit is generally pathway and that no commercially important species or variety can be considered as immune to citrus bacterial canker. In the current assessment, the EFSA PLH Panel analysed the two scientific papers provided by the Japanese authorities, as well as 16 additional papers identified through a systematic literature review. The PLH Panel considered that the conclusions of its previous opinion remain valid and that convergent lines of evidence provide sufficient demonstration that is a host of pv. and pv. . Therefore, there is no reason to consider the fruit differently from other citrus species. Consequently, the assessment of the general citrus fruit pathway from the 2014 opinion still applies. Uncertainties on these conclusions are a result of the scarce scientific evidence published on this subject in addition to the methodological and reporting limitations of the published papers.
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http://dx.doi.org/10.2903/j.efsa.2017.4876 | DOI Listing |
Mol Phylogenet Evol
January 2025
Laboratory of Diagnosis and Integrated Management of Plant Bio-Aggressors. University of Parakou, BP123 Parakou, Borgou, Benin.
Multigene, genus-wide phylogenetic studies have uncovered the limited taxonomic resolution power of commonly used gene markers, particularly of rRNA genes, to discriminate closely related species of the nematode genus Heterorhabditis. In addition, conflicting tree topologies are often obtained using the different gene markers, which limits our understanding of the phylo- and co-phylogenetic relationships and biogeography of the entomopathogenic nematode genus Heterorhabditis. Here we carried out phylogenomic reconstructions using whole nuclear and mitochondrial genomes, and whole ribosomal operon sequences, as well as multiple phylogenetic reconstructions using various single nuclear and mitochondrial genes.
View Article and Find Full Text PDFPlants (Basel)
December 2024
Department of Life Science, Health, and Health Professions, University of Rome "Link Campus", 00165 Rome, Italy.
Mandarin, one of the winter fruits commonly used in the preparation of foods and juices, is a fruit native to China and Southeast Asia. In this work, essential oils (EOs) obtained from by-products of the Blanco flavedo of five cultivars present and cultivated within the Botanical Garden of Palermo were chemically and biologically studied: 'Avana' (), 'Tardivo di Ciaculli' (), 'Bombajensis' (), 'Aurantifolia' (), and 'Padre Bernardino' (). The GC and GC-MS analysis performed on all the extracted samples clearly highlighted the notable presence of limonene, a characteristic hydrocarbon monoterpene of EOs of the genus.
View Article and Find Full Text PDFMicroorganisms
December 2024
Changsha Comprehensive Survey Center of Natural Resources, China Geological Survey, Changsha 410600, China.
The phosphorus (P) availability in soils is influenced by microbes, particularly those containing the gene responsible for phosphate solubilization. The present study investigated the community structure, diversity, and co-occurrence networks of -harboring bacteria in karst and non-karst citrus orchard soils across a planting duration gradient, natural forests, and abandoned land, as well as the soil total P (TP) and available P (AP) contents and enzyme activities. The soil AP contents were lower in the karst regions than in the non-karst regions, while the soil organic carbon (C; SOC), exchangeable calcium, and microbial biomass nitrogen (N) contents; alkaline phosphatase (ALP) and β-Glucuronidase activities; and pH had the opposite trends.
View Article and Find Full Text PDFMicroorganisms
December 2024
College of Coastal Agricultural Science, Guangdong Ocean University, Zhanjiang 524088, China.
subsp. () is a Gram-negative bacterium responsible for citrus canker, a significant threat to citrus crops. ClpV is a critical protein in the type VI secretion system (T6SS) as an ATPase involved in bacterial motility, adhesion, and pathogenesis to the host for some pathogenic bacteria.
View Article and Find Full Text PDFAntibiotics (Basel)
November 2024
Department of Food Science, National Taiwan Ocean University, No. 2, Pei-Ning Road, Keelung 202, Taiwan.
Essential oils (EOs), regarded as secondary metabolites from plants, possess effective antibacterial properties. This study investigates the antibacterial efficacy of seven citrus EOs against six spoilage bacteria: , , , , , and . The antibacterial activity of these EOs was evaluated using solid- and vapor-phase applications.
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