What disease does Xanthomonas citri cause?
Summary of Invasiveness. X. citri is a bacterial pathogen that causes citrus canker – a disease which results in heavy economic losses to the citrus industry worldwide either in terms of damage to trees (p…
Is Xanthomonas citri subsp a bacteria?
The causal agent is Xanthomonas citri subsp. citri (Xcc), a Gram-negative bacterial pathogen capable of colonizing all aboveground tissues of citrus plants, including young leaves, thorns, shoots, and fruits3,4.
What is meant by citrus canker?
Citrus canker, caused by the bacterium Xanthomonas citri subsp. citri, affects the leaves, twigs and fruit of citrus plants causing the leaves to drop and unripe fruit to fall to the ground. All types of citrus are affected by the disease.
Is Xanthomonas gram positive?
Xanthomonas species are gram negative, aerobic, rod-shaped bacteria with cells measuring 0.4 to 1.0 µm wide by 0.7 to 2.0 µm long. All members of the genus Xanthomonas are catalase positive and oxidase negative.
How did Xanthomonas citri get its name?
Description and significance. X. citri is part of the Xanthomonas genus of phytopathogenic bacteria that inhabit the phyllosphere of citrus plants species and crops and produce the citrus canker disease. The bacteria are named for their pathogenic behaviors that target citrus fruits and crops.
Is the Xanthomonas citri bacteria harmless to humans?
Xanthomonas citri is a Gram-negative, rod-shaped proteobacterium. Although it is harmless for humans, it is a phytopathogen, known for being the causing agent of citrus canker . Xanthomonas citri uses its type IV secretion system to kill other Gram-negative bacterial species in a contact-dependent manner.
What kind of bug is Xanthomonas campestris pv.citri?
Xanthomonas axonopodis pv. citric (synonym: Xanthomonas campestris pv. citri) is a gram negative, aerobic, rod-shaped bacterium that causes citrus canker. This pathogen generally causes leaf-spotting and fruit rind-blemishing disease.
How many species of Xanthomonas are there in the world?
Xanthomonas (from greek: xanthos – “yellow”; monas – “entity”) is a genus of Proteobacteria, many of which cause plant diseases. There are at least 27 plant associated Xanthomonas spp., that all together infect at least 400 plant species.