دانلود متن کامل مقاله شماره 17
سیستم های تحمل ریزوباکتریها به بیماریهای گیاهی
Understanding the involvement of rhizobacteriamediated induction of systemic resistance in biocontrol of plant diseases
Abstract: range of plant pathogens. To exploit induced systemic resistance, detailed knowledge of the triggering bacterial traits involved and on signal transduction pathways in the plant is necessary. Possibilities to improve effectiveness of induced resistance by rhizobacterial strains are discussed.
Introduction The estimated number of prokaryotic cells in our planet’s soil is 2.6 × 10 29, providing an enormous capacity for genetic
diversity (Whitman et al. 1998) and a great potential for exploitation. One of the uses of prokaryotes from soil is for biological control of soilborne plant diseases (Handelsman and Stabb 1996). Particularly, strains of plantroot- inhabiting fluorescent Pseudomonas spp. have been
studied in detail for their disease suppressive properties. In a recent review, Weller et al. (2002) described the importance of these bacteria in soil suppressiveness against Gaeumannomyces graminis root surface of the plant (Lugtenberg et al. 2001), and effective expression of disease-suppressive traits (Handelsman and Stabb 1996), are generally considered prerequisites for successful suppression of soilborne diseases by rhizobacteria. The mechanisms involved in disease suppression
induced systemic resistance, lipopolysaccharides, Pseudomonas fluorescens, Pseudomonas putida, salicylic
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