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Showing 2 results for Polysaccharide

Rasool Rezaei,
Volume 4, Issue 1 (3-2015)

Rezaei R. 2015. Pathogenicity and virulence factors of plant pathogenic bacteria. Plant Pathology Science 4(1):23-33.
 Plant pathogenic bacteria have evolved specialized strategies to infect their hosts. In this regard, the key virulence factors are effector proteins, cell wall degrading enzymes, toxins, extracellular polysaccharides and phytohormones. The interactions between plant pathogenic bacteria and their hosts have resulted in an evolutionary system between host defense responses and pathogen virulence factors. Pathogenic bacteria are continually under pressure to diversify their mechanisms to prevent host defenses and optimize nutrient availability. In turn, these virulence mechanisms have shaped the evolution of plant innate immunity. In this paper, the pathogenicity and virulence factors of plant pathogenic bacteria are discussed.

Maryam Khezri,
Volume 5, Issue 2 (8-2016)

Khezri  M. 2016. Biofilm  formation  in  probiotic  bacterium Bacillus subtilis. Plant  Pathology  Science 5(2):52-62.

Most bacteria have a common ability to form communities known as biofilm. They are varied in structure and function, but have some similarities in general properties. The main compounds of biofilms are extracellular polysaccharides. The probiotic Bacillus subtilis is a gram-positive, rod-shape, endospore-forming and soil inhabiting bacterium that has many agricultural use, such as plant growth promoting activity and biocontrol potential against many of phytopathogens. Biofilm formation is an important microbial survival strategy that enables microorganisms to stay together for long time. Biofilm can protect the bacteria against unfavorable conditions, like antibiotics, chemical pesticides and biocide components. Capability of biofilm formation in probiotic B. subtilis plays significant role in root colonization and biological control of plant pathogens.

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