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Brenneria
''Brenneria'' is a genus of Pectobacteriaceae, containing mostly pathogens of woody plants. This genus is named after the microbiologist Don J. Brenner. Some members of this genus were formerly placed in ''Erwinia''. Species Species now placed in ''Brenneria'' include: * ''Brenneria alni'' * ''Brenneria corticis'' * ''Brenneria goodwinii'' * ''Brenneria nigrifluens'' * ''Brenneria populi'' * ''Brenneria roseae'' ** subsp. ''americana'' ** subsp. ''roseae'' * ''Brenneria rubrifaciens'' * ''Brenneria salicis ''Brenneria salicis'' is a Gram-negative bacterium that is pathogenic on plants. The bacterium is known to cause 'watermark disease' in willow ('' Salix'' ssp.) trees. Watermark disease affects infected trees by occluding the xylem Xylem is ...'' Plant disease Plant diseases and host ''Brenneria rubrifaciens'' (deep bark canker) - Walnut (''Juglans regia'') ''Brenneria'' ''goodwinii'' (Acute Oak Decline) - Oak (''Quercus robur'') ''Brenneria salicis'' (Wate ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Brenneria Corticis
''Brenneria'' is a genus of Pectobacteriaceae, containing mostly pathogens of woody plants. This genus is named after the microbiologist Don J. Brenner. Some members of this genus were formerly placed in ''Erwinia''. Species Species now placed in ''Brenneria'' include: * ''Brenneria alni'' * ''Brenneria corticis'' * ''Brenneria goodwinii'' * ''Brenneria nigrifluens'' * ''Brenneria populi'' * ''Brenneria roseae'' ** subsp. ''americana'' ** subsp. ''roseae'' * ''Brenneria rubrifaciens'' * ''Brenneria salicis'' Plant disease Plant diseases and host ''Brenneria rubrifaciens'' (deep bark canker) - Walnut (''Juglans regia'') ''Brenneria'' ''goodwinii'' (Acute Oak Decline) - Oak (''Quercus robur'') ''Brenneria salicis'' (Watermark disease) - Willow (''Salix spp.'') ''Brenneria alni'' (bark canker) - Alder (''Alnus spp.'') ''Brenneria nigrifluens'' (shallow bark canker) - Walnut (''Juglans regia'') ''Brenneria populi'' (bark canker) - Poplar (''Populus x euramericana'') '' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Brenneria Goodwinii
''Brenneria'' is a genus of Pectobacteriaceae, containing mostly pathogens of woody plants. This genus is named after the microbiologist Don J. Brenner. Some members of this genus were formerly placed in ''Erwinia''. Species Species now placed in ''Brenneria'' include: * ''Brenneria alni'' * ''Brenneria corticis ''Brenneria'' is a genus of Pectobacteriaceae, containing mostly pathogens of woody plants. This genus is named after the microbiologist Don J. Brenner. Some members of this genus were formerly placed in ''Erwinia''. Species Species now place ...'' * '' Brenneria goodwinii'' * '' Brenneria nigrifluens'' * '' Brenneria populi'' * '' Brenneria roseae'' ** subsp. ''americana'' ** subsp. ''roseae'' * '' Brenneria rubrifaciens'' * '' Brenneria salicis'' Plant disease Plant diseases and host ''Brenneria rubrifaciens'' (deep bark canker) - Walnut (''Juglans regia'') ''Brenneria'' ''goodwinii'' (Acute Oak Decline) - Oak (''Quercus robur'') ''Brenneria salicis'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Brenneria Salicis
''Brenneria salicis'' is a Gram-negative bacterium that is pathogenic on plants. The bacterium is known to cause 'watermark disease' in willow ('' Salix'' ssp.) trees. Watermark disease affects infected trees by occluding the xylem Xylem is one of the two types of transport tissue (biology), tissue in vascular plants, the other being phloem; both of these are part of the vascular bundle. The basic function of the xylem is to transport water upward from the roots to parts o ... vessels, impeding circulation. Early signs of the disease are wilting or dried-out, dead leaves on intermittent branches throughout the tree's crown. Cross sections from affected branches show a watery, transparent discoloration to an orange-brown staining in the wood. Cross sections of a killed tree's main stem are blanched completely white.Willow Resistance to the Watermark Disease, author: M. Steenackers. The white willow, '' S. alba'', is very sensitive to watermark disease, while the crack willow, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Acute Oak Decline
Acute oak decline (AOD) is a disease that infects oak trees originally described in the UK. It mainly affects mature oak trees of over 50 years old of both Britain's native oak species: the pedunculate oak (''Quercus robur'') and the sessile oak (''Quercus petraea''). The disease is characterised by the trees bleeding or oozing a dark fluid from small lesions or splits in their bark. Unlike chronic oak decline, acute oak decline can lead to the death of trees within 4 to 5 years of symptoms appearing. The number of trees affected is thought to number in the low thousands, with a higher number of infected trees being found in the Midlands. Causes of the disease Acute Oak Decline is a complex tree decline disease that cannot be explained by a single cause. It results from a combination of environmental factors weakening the trees and some biotic factors. Bacterial pathogens Two different species of bacteria, ''Brenneria goodwinii, Gibbsiella quercinecans,'' are repeatedly f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pectobacteriaceae
The ''Pectobacteriaceae'' are a family (biology), family of Gram-negative bacteria which largely consist of plant pathogens. This family is a member of the order Enterobacterales in the class Gammaproteobacteria of the phylum Pseudomonadota. The type species of this family is ''Pectobacterium''. The name ''Pectobacteriaceae'' is derived from the Latin term ''Pectobacterium'', referring the type genus of the family and the suffix "-aceae", an ending used to denote a family. Together, ''Pectobacteriaceae'' refers to a family whose nomenclatural type is the genus ''Pectobacterium''. Biochemical Characteristics and Molecular Signatures Source: Members of the family produce acid from N-acetylglucosamine and are negative for arginine dihydrolase, orthinine decarboxylase and lysine decarboxylase. These bacteria are catalase-positive, oxidase-negative, and do not produce hydrogen disulfide. Genomic analyses identified four conserved signature indels (CSIs) that are specific this fami ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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. Many infect woody plants. A well-known member of this genus is the species '' E. amylovora'', which causes fire blight on apples, pears, and other Rosaceae crops; ''E. tracheiphila'', though, causes bacterial wilt of cucurbits. Other familiar species, such as '' E. carotovora'' (another major cause of plant diseases), are more distantly related to the fire blight bacterium, and have been moved to genera '' Brenneria'', '' Dickeya'', and '' Pectobacterium''. ''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' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pathogen
In biology, a pathogen (, "suffering", "passion" and , "producer of"), in the oldest and broadest sense, is any organism or agent that can produce disease. A pathogen may also be referred to as an infectious agent, or simply a Germ theory of disease, germ. The term ''pathogen'' came into use in the 1880s. Typically, the term ''pathogen'' is used to describe an ''infectious'' microorganism or agent, such as a virus, bacterium, protozoan, prion, viroid, or fungus. Small animals, such as helminths and insects, can also cause or Transmission (medicine), transmit disease. However, these animals are usually referred to as parasites rather than pathogens. The scientific study of microscopic organisms, including microscopic pathogenic organisms, is called microbiology, while parasitology refers to the scientific study of parasites and the organisms that host them. There are several pathways through which pathogens can invade a host. The principal pathways have different episodic time ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
