What does Erwinia amylovora cause?

amylovora causes fire blight, a devastating plant disease affecting a wide range of host species within the Rosaceae subfamily Spiraeoideae, and is a major global threat to commercial apple and pear production.

Which disease is caused by Erwinia?

Pathogen. Erwinia amylovora is a gram negative, facultative anaerobic, short rod-shaped bacterium. The cell sizes of this bacterium range from 1.1 to 1.6 µm x 0.6 to 0.9 µm. This bacterium is the causal agent of the disease fire blight in many rosaceous plants.

Is Erwinia harmful to humans?

Erwinia chrysanthemi strains cause death of human gastrointestinal cells in culture and express an intimin-like protein.

What does Erwinia look like?

Symptoms may appear anywhere on the plant, with water-soaked lesions appearing on leaves, and soft rots on stems and plant crowns. Erwinia cells have flagella (tails) scattered over their surface membranes.

How was Erwinia amylovora named?

Description and significance Fire blight, a disease that affects and can cause extensive damage to apple and pear trees, is caused Erwinia amylovora. It received its name from the appearance of the infected leaves and branches, which often appears blackened as if scorched by fire (4).

Who discovered Erwinia amylovora?

Eventually, a U.S. Department of Agriculture scientist named Erwin F. Smith and colleagues overcame the opposition and carried on additional research in the early 1900s that proved that bacteria cause diseases in many plants. The fire blight bacterium, Erwinia amylovora, was later named for him.

Who discovered Erwinia?

Erwinia is a genus of Enterobacterales bacteria containing mostly plant pathogenic species which was named for the famous plant pathologist, Erwin Frink Smith. It contains Gram-negative bacteria related to Escherichia coli, Shigella, Salmonella, and Yersinia. They are primarily rod-shaped bacteria.

What shape is Erwinia?

Erwinia carotovora is a plant pathogen belonging to the Family Enterobacteriaceae. It is a Gram- negative, rod- shaped bacterium. It is non- sporeforming and peritrichously flagellated.

Where is Erwinia amylovora from?

Erwinia amylovora is a native pathogen of wild, rosaceous hosts in eastern North America. It was the first bacterium proven to be a pathogen of plants. Today, fire blight is an important disease of apples and pears in many parts of the world.

What is the scientific name of Erwinia?

Erwinia amylovora (fireblight)

What do you need to know about Erwinia amylovora?

Tissues affected by the symptoms of Erwinia amylovora include blossoms, fruits, shoots, and branches of apple (Pomoideae), pear, and many other rosaceous plants. All symptoms are above ground and are typically easy to recognize. Symptoms on blossoms include water soaking of the floral receptacle, ovary, and peduncles.

How did the genus Erwinia get its name?

Erwinia is a genus of Enterobacterales bacteria containing mostly plant pathogenic species which was named for the famous plant pathologist, Erwin Frink Smith. It contains Gram-negative bacteria related to Escherichia coli, Shigella, Salmonella, and Yersinia.

How does e.amylovora survive outside the host?

Since E. amylovora is not an obligate biotroph, it is able to survive outside the host which allows it to spread in many ways such as rain. Type strain NCPPB 683 “Australia, New Zealand trade insults over fire blight. “Local apple producers say no to Kiwis’ fruit”. Helm, Leslie; Eisenstodt, Gale (July 22, 1996).

What kind of pathogen does Erwinia aphidicola have?

Erwinia aphidocola and E. persicina species were both observed to be present within the floral nectar microbial community of seven different orchid ( Epipactis) flower species. E. aphidicola appears to display characteristics of a pathogen as it had decimated fifty percent of a bean crop in Spain in late 2003.