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sp. nov., and sp. nov., isolated from watermelon in Florida.
Int J Syst Evol Microbiol
December 2024
Department of Plant Pathology, University of Florida, Gainesville, FL, USA.
Three fluorescent bacterial strains, K1, K13 and K18, were obtained from watermelon () foliage symptomatic of bacterial leaf spot of cucurbits in Florida. The strains underwent phenotypic characterization, including LOPAT (levan production, oxidase activity, pectolytic activity on potato, arginine dihydrolase production and hypersensitive response (HR) on both tobacco and tomato) and pathogenicity testing on watermelon and squash seedlings. Whole-genome sequencing of the isolates was performed, and multi-locus sequence analysis (MLSA) utilizing housekeeping genes , , and placed the isolates into two distinct clades within the genus.
View Article and Find Full Text PDFsp. nov., a novel bacterial species causing leaf spots on strawberry (×).
Int J Syst Evol Microbiol
August 2024
Department of Plant Pathology, University of Florida, Gulf Coast Research and Education Center, Wimauma, FL 33598, USA.
In Florida, angular leaf spot, caused by , was the only known bacterial disease in strawberry, which is sporadic and affects the foliage and calyx. However, from the 2019-2020 to 2023-2024 Florida strawberry seasons, unusual bacterial-like symptoms were observed in commercial farms, with reports of up to 30 % disease incidence. Typical lesions were water-soaked and angular in early stages that later became necrotic with a circular-ellipsoidal purple halo, and consistently yielded colonies resembling on culture media.
View Article and Find Full Text PDFA metagenomic survey of the fecal microbiome of the African savanna elephant (Loxodonta africana).
Anim Genet
August 2024
Department of Animal Science, University of the Free State, Bloemfontein, Free State, South Africa.
The African savanna elephant (Loxodonta africana) is the largest terrestrial animal on Earth and is found primarily in Southern and Eastern Africa. It is a hindgut, colonic fermenter and subsists on a diet of raw plant materials found in its grazing area. In this study the bacterial, archaeal and fungal populations of seven African savanna elephant fecal metagenomes were first characterized using amplicon sequencing.
View Article and Find Full Text PDFFirst Report of Causing Potato Blackleg in Fujian Province China.
Plant Dis
April 2024
Fujian Academy of Agricultural Sciences, 107629, Institute of Crop Sciences, Fuzhou, Fujian, China;
Blackleg and soft rot are harmful diseases in potato (Solanum tuberosum) caused by Pectobacterium spp. and Dickeya spp. (Czajkowski et al.
View Article and Find Full Text PDFSvx Peptidases of Phytopathogenic Pectolytic Bacteria: Structural, Catalytic and Phytoimmune Properties.
Int J Mol Sci
January 2024
Kazan Institute of Biochemistry and Biophysics, FRC Kazan Scientific Center of RAS, 420111 Kazan, Russia.
Svx proteins are virulence factors secreted by phytopathogenic bacteria of the genus into the host plant cell wall. Svx-encoding genes are present in almost all species of the soft rot Pectobacteriaceae ( and genera). The Svx of () has been shown to be a gluzincin metallopeptidase that presumably targets plant extensins, proteins that contribute to plant cell wall rigidity and participate in cell signaling.
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