As such, they are classified as bacillus bacteria based on shape. Xylella fastidiosa: Xylella fastidiosa is a common plant pathogen belonging to the genus Xylella.Ĭharacteristics of this species are discussed below in detail:Īs mentioned, members of the genus Xylella are Gram-negative rods.Here, Xylella fastidiosa is one of the most popular members of the genus Xylella. Members of this group are plant pathogens that are mostly transmitted by insects. Genus: Xylella - The genus Xylella consists of Gram-negative rods.Rhodanobacter and Xanthomonas etc) have been shown to be involved in the degradation of petroleum hydrocarbons. As such, they lack flagella used by some bacteria for motility. Family: Xanthomonadaceae - Members of the family Xanthomonadaceae (about 23 genera) are Gram-negative rods that move by means of type IV pili.

The group also consists of many plant parasites. They are generally aerobic and are catalase positive. Order: Xanthomonadales - The order Xanthomonadales consists of Gram-negative bacteria that are characterized by a rod-shaped morphology and do not form spores.While some of the species are capable of forming a symbiotic relationship with other organisms, others are pathogenic while others live freely in aquatic and terrestrial environments. Depending on the species, they may have flagella for motility (polar or peritrichous flagella) while others lack this structure. Class: Gammaproteobacteria - Consisting of about 250 genera, Gammaproteobacteria is a class of Gram-negative bacteria that are well distributed in the environment.The group is also very diverse and consists of both free-living and pathogenic species. A good number of these species move by means of flagella while others, like Xylella fastidiosa, move by gliding. fastidiosa belong to the phylum Proteobacteria which is a large phylum of Gram-negative bacteria. In addition, they have a cell wall in place that consists of a peptidoglycan layer.

fastidiosa is a prokaryote characterized by a simple cell structure lacking membrane-bound organelles.

Kingdom: Bacteria - Like other bacteria, X.

Xylella cytoscape