Plant pathogenic bacteria

2020-03-30 23:11

Antibiotic resistance in plantpathogenic bacteria has become a problem in pathosystems where these antibiotics have been used for many years. Where the genetic basis for resistance has been examined, antibiotic resistance in plant pathogens has most often evolved through the acquisition of a resistance determinant via horizontal gene transfer.Most plant pathogenic bacteria are rodshaped (bacilli). In order to be able to colonize the plant they have specific pathogenicity factors. Five main types of bacterial pathogenicity factors are known: uses of cell walldegrading enzymes, toxins, effector proteins, phytohormones and exopolysaccharides. plant pathogenic bacteria

The enterobacterial plant pathogens are an important group of bacteria responsible for disease on a wide range of plant species in geographically diverse regions. The enterobacterial plant pathogens entered the postgenomics age in 2004, with the completion of the Pectobacterium atrosepticum SCRI1043 genome sequence.

How can the answer be improved? Most of the plant pathogenic bacteria are either Grampositive, classified within the Phylum Actinobacteria, or Gramnegative, in the Phylum Proteobacteria. Grampositive and Gramnegative cells appear purple or red, respectively, with specific stains when viewed at 1000x magnification with a light microscope ( Figure 12 ).plant pathogenic bacteria Plant pathogenic bacterial vir ulence factors are associated w ith the bacterial sur face or secreted into the surrou nding environment. Proteins sec reted by bacteria are tr ansported via molecula r

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Plant pathogenic bacteria free

The Epoch of Plant Warfare If a pathogenic bacteria is to be thwarted in its attempts to make a meal out of its host plant, then every part of its lifestyle needs to be understood down to the minute details to find places to counter them. A single small chemical change has the potential to allow a pathogen to thrive or expire in its target host. plant pathogenic bacteria Plant pathogenic bacteria have rodshaped cells and rely on contact with a host organism to obtain the energy they need to grow and reproduce. They do not have a dispersal mechanism, so must rely on naturally occurring vectors (such as rain, insects, and soildwelling organisms) to move their cells into contact with a suitable host. BACTERIAL PLANT PATHOGENS AND SYMPTOMOLOGY Bacteria are microscopic prokaryotic (a cell in which the nuclear material is not enclosed by a nuclear membrane) and, for the most part, singlecelled microorganisms. A single teaspoon of healthy topsoil contains about a billion bacterial cells, 120, 000 fungal cells and 25, 000 algal cells. Ralstonia solanacearum is probably the most destructive plant pathogenic bacterium worldwide. One of the reasons for this is that the R.  solanacearum species is composed of a very large group of strains varying in their geographical origin, host range and pathogenic behaviour (Denny, 2006; Genin, 2010).